Articles

Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and edited by countless contributing members over a period of time. A global group of dedicated editors oversee accuracy, consulting with expert advisers, and constantly reviewing additions.

96 results found
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Abnormal bowel wall attenuation patterns

Abnormal bowel wall attenuation patterns on CT scan can be grouped under five categories: white enhancement gray enhancement water halo sign fat halo sign black attenuation The first three patterns are seen on contrast studies. White enhancement It is defined as uniform enhancement of th...
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Accordion sign

The accordion sign is seen on CT examinations of the abdomen and refers to the similarity between the thickened oedematous wall of pseudomembranous colitis to that of an accordion. The appearance arises as a result of oral contrast being trapped between oedematous haustral folds and pseudomembra...
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Antral nipple sign

The antral nipple sign refers to redundant pyloric mucosa protruding into the gastric antrum and is seen in pyloric stenosis. See also cervix sign of pyloric stenosis target sign of pyloric stenosis shoulder sign of pyloric stenosis
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Antral pad sign

An antral pad sign is a feature seen on a spot radiograph of the upper gastrointestinal tract obtained with orally administered contrast material. It refers to the the extrinsic impression or indentation on the postero-inferior aspect of the antrum. The impression is generally arcuate and smooth...
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Apple core sign - colon

The apple core sign, also known as a napkin ring sign (bowel), is most frequently associated with constriction of the lumen of the colon by a stenosing annular colorectal carcinoma. Differential diagnosis The appearance of the apple-core lesion of the colon also can be caused by other diseases...
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Apple-peel intestinal atresia

Apple-peel intestinal atresia, also known as type IIIb or Christmas tree intestinal atresia, is a rare form of small bowel atresia in which the duodenum or proximal jejunum ends in a blind pouch and the distal small bowel wraps around its vascular supply in a spiral resembling an apple peel. Oft...
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Arrowhead sign

The arrowhead sign refers to the focal caecal thickening centered on the appendiceal orifice, seen as a secondary sign in acute appendicitis. The contrast material in the cecal lumen assumes an arrowhead configuration, pointing at the appendix.   The arrowhead sign is applicable only when enter...
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Backwash ileitis

Backwash ileitis is seen in patients with ulcerative colitis (UC), where the entire colon is involved. In such cases the terminal ileum is oedematous. Backwash ileitis extends contiguously backward from the cecum without skip regions. One source estimates it to occur in 6% of patients with UC, ...
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Beak sign in pyloric stenosis

Beak sign in pyloric stenosis is one of the fluoroscopic (Barium meal) findings which is useful in the diagnosis of congenital hypertrophic pyloric stenosis.  Radiographic features Barium meal Peak of Barium is seen entering into the narrowed and compressed pyloric channel with distal taperin...
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Bilateral adrenal gland hyperenhancement

Bilateral adrenal gland hyperenhancement or intense adrenal enhancement may be a feature of hypotension and forms part of the CT hypoperfusion complex. It has has been described in paediatric and small adult series or individual cases of haemorrhagic shock, pancreatitis, sepsis and trauma 1-3 b...
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Bird-beak sign

The bird-beak sign is used to refer to the tapering of the inferior oesophagus in achalasia. The same appearance (although it is difficult to see the similarity) is also referred to as the rat-tail sign. The appearances although classically occurring in primary achalasia, can also occur in pseu...
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Bull's eye sign: general

There are many bull's eye signs, also referred to as target signs: red bone marrow located in shaft of long bone with central yellow marrow on MRI peripheral plexiform neurofibromas on MRI intussusception: see target sign of intussusception choledocholithiasis: see target sign of choledochol...
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Caecal bar sign

The caecal bar sign is a secondary sign in acute appendicitis. It refers to the appearance of inflammatory soft tissue at the base of the appendix, separating the appendix from the contrast-filled caecum. See also arrowhead sign
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Carman meniscus sign

The Carman meniscus sign describes the lenticular shape of barium in cases of large and flat gastric ulcers, in which the inner margin is convex toward the lumen. It usually indicates a malignant ulcerated neoplasm; in cases of benign gastric ulcers, the inner margin is usually concave toward th...
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Centipede sign

The centipede sign is seen as engorged mesenteric vessels in case of acute sigmoid diverticulitis which gives an appearance similar to centipede 1.
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Cervix sign of pyloric stenosis

The cervix sign of pyloric stenosis describes indentation of the pylorus into the fluid-filled antrum, seen in pyloric stenosis. See also antral nipple sign target sign of pyloric stenosis shoulder sign of pyloric stenosis
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Cobblestoning

Cobblestoning (having a cobblestone appearance) can occur in a number of hollow organs with mucosa, most commonly the bowel, in the setting of Crohn's disease.  Longitudinal and circumferential fissures and ulcers separate islands of mucosa, giving it an appearance reminiscent of cobblestones. ...
Article

Coffee-bean sign

The coffee-bean sign (also known as bent inner tube sign 4 ) is a sign on an abdominal plain film of a sigmoid volvulus although some authors have also used the term to refer to closed loop small bowel obstructions. This contrasts to a kidney bean sign which is seen with a caecal volvulus. This...
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Colon cut-off sign

Colon cut-off sign describes gaseous distension seen in proximal colon associated with narrowing of the splenic flexure in cases of acute pancreatitis. Though originally described in abdominal radiographs, this sign has also been demonstrated in contrast enemas and computed tomography1. This ap...
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Comb sign

The comb sign refers to the hypervascular appearance of the mesentery in active Crohn disease.  Fibrofatty proliferation and perivascular inflammatory infiltration outline the distended intestinal arcades. This forms linear densities on the mesenteric side of the affected segments of small bowel...
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Cone-shaped caecum

A number of conditions can result in a cone-shaped caecum, with the apex pointing at the base of the appendix. Pathology Aetiology infectious blastomycosis amebiasis Yersinia enterocolitis tuberculosis typhoid fever cytomegalovirus (CMV) infection inflammatory inflammatory bowel disea...
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Corkscrew sign

The corkscrew sign describes the spiral appearance of the distal duodenum and proximal jejunum seen in midgut volvulus. It has been identified as a diagnostic indicator of midgut volvulus1. In patients with malrotation and volvulus, the distal duodenum and proximal jejunum do not cross the midl...
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Crescent in a doughnut sign

The crescent in a doughnut sign refers to the transverse ultrasound appearance of intestinal intussusception, and is a variation of the target sign (which is also known as the doughnut sign) The doughnut is formed by concentric alternating echogenic and hypoechogenic bands. The echogenic b...
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Cupola sign

The cupola sign is seen on a supine chest or abdominal radiograph in the presence of pneumoperitoneum. It refers to dependant air that rises within the abdominal cavity of the supine patient to accumulate underneath the central tendon of the diaphragm in the midline. The superior border is well...
Article

Dependent viscera sign

The dependent viscera sign is one of the signs of diaphragmatic rupture on axial CT or MR images, where herniated viscera lies against the posterior thoracic wall in a dependent position, as it is no longer supported by the diaphragm. See also  collar sign (or hour glass sign)
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Doge cap sign

Doge cap sign a radiographic sign of pneumoperitoneum. It is due to air in Morrison pouch, which presents as a triangular gas density.
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Double barrel sign

Double barrel sign is an imaging appearance of two lumens adjacent to each other. It can be seen in: dilated bile duct adjacent to portal vein double barrel aorta: aortic dissection double barrel oesophagus: oesophageal dissection
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Double bubble sign

The double bubble sign is seen in infants and represents dilatation of the proximal duodenum and stomach. It is seen in both radiographs and ultrasound, and can be identified antenatally 2. Pathology Causes include 1,2: congenital obstruction duodenal web duodenal atresia duodenal stenosis...
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Double duct sign

The double duct sign refers to the presence of simultaneous dilatation of the common bile and pancreatic ducts. Being an anatomical sign it can be seen on all modalities that can visualise the region, including: MRI, CT, ultrasound and endoscopic retrograde cholangiopancreatography (ERCP).  The...
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Double track sign of pyloric stenosis

The double track sign is a radiological sign described in pyloric stenosis on various imaging modalities.  Barium study Double streaks of barium passing through the narrow pylorus.1 Ultrasound On fluid aided real-time examination, Pyloric fluid compressed into smaller tracks as it is impinge...
Article

Double wall sign

The double wall sign is another name for the Rigler sign. It is a sign of pneumoperitoneum with air outlining both sides of the bowel wall. It is seen when large amount of free air, > 1000 ml, is present. It should be distinguished from the false double-wall sign which refers to two dilated ...
Article

Duct penetrating sign

The duct-penetrating sign is a radiographic sign which can be useful in differentiating between focal pancreatitis (inflammatory pancreatic mass ) from pancreatic carcinoma. Best description of positive sign is visualisation of a mass penetrated by an unobstructed pancreatic duct makes focal pa...
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Falciform ligament sign

The falciform ligament sign (also called the Silver's sign) is a sign seen with a pneumoperitoneum. It is almost never seen in isolation. If there is enough free air to outline the falciform ligament, there is usually enough air to also provide at least a Rigler's sign.  The falciform ligamen...
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Fascial tail sign

The fascial tail sign is the linear extension along the fascia/muscular aponeurosis from a deeper tumor. Radiographic features It appears as a tail and is best appreciated on MRI, classically seen in desmoid tumours as T2 hypointense bands that progressively enhance particularly on delayed pha...
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Fat halo sign of inflammatory bowel disease

The fat halo sign refers to a feature seen on CT examination of the abdomen, and represents infiltration of the submucosa with fat, between the muscularis propria and the mucosa. It is characterised by an inner (mucosa) and outer (muscularis propria and serosa) ring of enhancing bowel wall along...
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Fat ring sign

The fat ring sign (also known as a  fat halo sign) describes preservation of fat around the mesenteric vessels and around soft tissue nodules on back ground of diffuse fat stranding in patients with mesenteric panniculitis or mesenteric lipomas.  This finding may help distinguish mesenteric pan...
Article

Fat stranding (summary)

Fat stranding is a sign that is seen on CT. It describes the change in attenuation of fat around an inflamed structure and is a very helpful signpost for intra-abdominal pathology. Summary relatively high sensitivity for intra-abdominal inflammatory pathology many inflammatory processes will ...
Article

Fat stranding on CT

Fat stranding is a common sign on CT seen anywhere fat can be found but is most commonly seen in the abdomen/pelvis, but also in the retroperitoneum, thorax and subcutaneous tissues. It can be helpful in localising both acute and chronic pathology. Radiographic features CT Fat stranding can a...
Article

Feline oesophagus

Feline oesophagus also known as oesophageal shiver, refers to the transient transverse bands seen in the mid and lower oesophagus on a double contrast barium swallow. The appearance is almost always associated with active gastro-oesophageal reflux 2,3 and is thought to be due to contraction of ...
Article

Fleischner sign of tuberculosis

The Fleischner sign refers to a widely gaping, thickened,patulous ileocaecal valve and narrowed ulcerated terminal ileum associated with tuberculous involvement of the ileocaecum. See also gastrointestinal tuberculosis stierlin sign fleishner's sign
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Floating aorta sign

The floating aorta sign refers to displacement of the abdominal aorta away from the vertebral column. It is a radiographic/ CT sign of retroperitoneal masses. Radiographic findings On lateral lumbar spine radiographs, the expected location of posterior aortic wall is expected to be <= 10mm...
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Foamy oesophagus sign

Foamy oesophagus is an appearence seen on a single contrast barium study in Candida oesophagitis with associated scleroderma/achalasia (stasis). Pathophysiology Pathophysiologic basis of the foamy esophagus is uncertain. Stasis is a predisposing factor.  Foam is produced directly by the fungal...
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Football sign

The football sign is seen in cases of massive pneumoperitoneum, where the abdominal cavity is outlined by gas from a perforated viscus. The median umbilical ligament and falciform ligament are sometimes included in the description of this sign, as representing the sutures. Which football is use...
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Frimann-Dahl sign

Frimann-Dahl sign is a diagnostic sign demonstrated when three dense lines representing the sigmoid walls seen converging to the site of obstruction in sigmoid volvulus and associated with empty rectal gas.
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Frostburg inverted 3 sign

Frostburg inverted 3 sign is a sign seen on a barium examination where there is  effacement and distortion of the mucosal pattern on the medial wall of the second part of the duodenum due to focal mass and local oedema. It is most commonly asssociated with carcinoma of the head of the pancreas b...
Article

Gastrointestinal string sign

The gastrointestinal string sign (string sign of Kantour) refers to the string-like appearance of a contrast-filled bowel loop caused by severe narrowing of a bowel loop. Originally used to describe the reversible narrowing caused by spasms in Crohn disease, it is now used for any severe narrow...
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Gut signature sign

The gut signature sign is an ultrasound term used to describe the appearance of the gastrointestinal wall. Radiographic features  Ultrasound Bowel has 5 layers, comprised of alternating hyperechoic and hypoechoic layers. Anatomically these layers are as follows (innermost to outermost) 1,2: ...
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Hampton line

The Hampton line is a thin millimetric radiolucent line seen at the neck of a gastric ulcer in barium studies (profile view), indicating its benign nature. It is caused by a thin line of mucosa overhanging the ulcer's crater.
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Hidebound bowel sign

The hidebound bowel sign refers to an appearance on a barium study of the small bowel in patients with scleroderma. The sign describes the narrow separation between the valvulae conniventes which are of normal thickness despite dilatation of the bowel lumen.   Although the term hidebound is use...
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Hyperattenuating ring sign in epiploic appandagitis

The hyperattenuating ring sign is a sign that has been described with epiploic appendagitis and refers to a hyperattenuating ring of visceral peritoneum surrounding a inflammed epiploic appendix 1. On CT it can be seen as a ring of soft tissue surrounding a region of fat attenuation adjacent to ...
Article

Hypercontracting (nutcracker) oesophagus

Hypercontracting (nutcracker) oesophagus is a motility disorder of the oesophagus. This condition is primarily diagnosed with manometry with high intra-oesopahgeal pressure and normal peristalsis. Most patients will have a normal barium swallow.  Hypercontracting oesophagus ("nutcracker oe...
Article

Ice pick sign

The ice pick sign is a smooth tapered narrowing of the upstream pancreatic duct distal to the pancreatic lesion seen frequently in benign pancreatic lesions such as a focal autoimmune pancreatitis, this is due to the extrinsic narrowing of the duct secondary to periductal fibrosis and inflammati...
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Intramural gas

Intramural gas, also known as pneumatosis intestinalis, refers to gas within the wall of the bowel. Terminology There are different terminologies in the medical literature, such as pneumatosis intestinalis, pneumatosis coli, and pneumatosis cystoides intestinalis, that seem to describe the sam...
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Jejunoileal fold pattern reversal

Jejunoileal fold pattern reversal (a.k.a. jejunisation of the ileum) is one of the signs of coeliac disease, and is seen on small bowel follow-through studies as well as CT. The pattern is one of increased number of ileal folds and reduced number of jejunal folds 1,2, and is considered positive ...
Article

Kirklin complex

The Kirklin complex is a combination of the Carman meniscus sign associated with a radiolucent semi-circular zone surrounding the elevated ridge of the ulcer. This complex is seen in cases of gastric adenocarcinoma on barium studies. See also Carman meniscus sign
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Kirklin sign

The Kirklin sign refers to a deformity of the normal gastric air bubble on an upright chest radiograph due to a mass lesion of the gastric cardia or fundus. The differential for a Kirklin sign includes gastric tumour gastric carcinoma oesophageal carcinoma gastrointestinal stromal tumour (G...
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Lateral crescent sign

Lateral crescent sign is a useful diagnostic sign of direct inguinal hernia on CT scan, the hernia cause compression and lateral displacement of inguinal canal contents (vas deferens, testicular vessels, fat, etc.) to form a semicircle of tissue that resembles a moon crescent seen lateral to the...
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Lead pipe sign

Lead pipe appearance of colon is the classical barium enema finding in chronic ulcerative colitis. There is complete loss of haustral markings in the diseased section of colon, and the organ appears smooth walled and cylindrical. 
Article

Light bulb sign - adrenal pheochromocytoma

The light bulb sign of an adrenal pheochromocytoma is MRI feature of this tumour. This refers to marked hyperintensity seen on T2 weighted sequences however this finding is neither sensitive nor specific and pheochromocytomas are more often heterogeneous with intermediate or high T2 signal inten...
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Low attenuation lymphadenopathy

Low attenuation lymphadenopathy suggests underlying necrosis and can be seen in: metastatic carcinoma (or lymphoma) infections (tuberculous or fungal) Whipple disease coeliac sprue See also lymphadenopathy low attenuating lymphadenopathy high attenuating lymphadenoapthy
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Lucent liver sign

The lucent liver sign is represented by a reduction of hepatic radiodensity on supine radiograph when there is a collection of free intraperitoneal air located anterior to the liver.
Article

Mallory Weiss tear

Mallory Weiss tears occur due to violent projection of gastric contents against the lower oesophagus, which results in mucosal and submucosal tear with involvement of the venous plexus.  Clinical presentation Patients present with massive painless haematemesis. Pathology Tears most commonly ...
Article

Mercedes-Benz sign (gallbladder)

In the gallbladder the Mercedes-Benz sign describes a star-shaped pattern of gas-fissuring within gallstones initially described on an abdominal radiograph 2. Fissures, usually fluid-filled, are present in close to 50% of gallstones. Less than half of these fissured gallstones contain some amou...
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Moulage sign

The moulage sign is related to sprue, in particular coeliac disease. It occurs where there is a dilated jejunal loop with complete loss of jejunal folds 1. It is said to appear like a tube into which wax has been poured. History and etymology Moulage (French: casting/moulding) is the art of ap...
Article

Mushroom cap sign

Mushroom cap sign is one of the important signs of deep rectosigmoid endometriosis seen on T2 weighted MRI sequence. It indicates the submucosal involvement in rectosigmoid region. Radiographic appearance MRI Hypertrophic muscularis propria appears as heterogeneous low signal intensity surrou...
Article

Mushroom sign of pyloric stenosis

The mushroom sign (also called umbrella sign) is a radiological sign described in pyloric stenosis on barium examination. This sign refers to the impression made by the hypertrophic pylorus on the duodenal cap. See also shoulder sign cervix sign of pyloric stenosis target sign of pyloric st...
Article

Neuhauser sign

Neuhauser sign refers to a soap bubble appearance seen in the distal ileum in cases of meconium ileus, related to the air mixed with meconium. It may be seen with barium enema if contrast passes beyond the ileocaecal valve or with small-bowel follow-through. Although classically described with ...
Article

Northern exposure sign

The northern exposure sign has been described as a high specificity sign in sigmoid volvulus. The sigmoid colon will be dilated and the apex of the volvulus is seen cephalic to gas in the transverse colon on supine abdominal radiography. 
Article

Polo mint sign

The polo mint sign is a description given to a venous thrombosis on contrast enhanced CT imaging.  When viewed in the axial plane, a thin rim of contrast persists around a central filling defect due to thrombus. This gives an appearance like that of the popular mint sweet, the polo, also referre...
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Pseudo vein sign

The pseudo vein sign can occur with active gastrointestinal bleeding where contrast extravasation during angiography may have a curvilinear appearance as it pools in the gastric rugae or mucosal folds of bowel, mimicking the appearance of a vein. However, contrast in the “pseudo-vein” persists ...
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Pseudokidney of intussusception

The pseudokidney of intussusception refers to the longitudinal ultrasound appearance of the intussuscepted segment of bowel. The fat containing mesentary which is dragged into the intussusception, containing vessels, is reminiscent of the renal hilum, with the renal parenchyma formed by the oe...
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Radiological signs: gastrointestinal tract

Radiological signs are described across the disciplines of imaging, including the gastrointestinal tract. Fruit-inspired, nature-related, and more feature in the list of signs described for a wide array of pathology. How fascinating are the minds of radiologists work in describing pathology?
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Rat-tail sign

The rat-tail sign is used to refer to the tapering of the inferior oesophagus in achalasia. The same appearance (although it is difficult to see the similarity) is also referred to as the bird-beak sign. 
Article

Reverse figure 3 sign

The reverse figure 3 sign (also known as the E sign) is seen on barium swallows in patients with a coarctation of the aorta and is the medial equivalent of the figure 3 sign seen on CXR. It is formed by prestenotic dilatation of the ascending aorta, indentation of the coarctation site (or "...
Article

Rigler sign

The Rigler sign, also known as the double wall sign, is seen on a radiograph of the abdomen when the air is present on both sides of the intestine, i.e. when there is air on both the luminal and peritoneal side of the bowel wall. Pneumoperitoneum may be a result of perforation or, from recent i...
Article

Rigler triad

Rigler triad consists of three findings seen in gallstone ileus: pneumobilia small bowel obstruction gallstone, usually in the right iliac fossa Rigler triad should not be confused with Rigler sign or the Hoffman-Rigler sign. History and etymology It is named after Leo George Rigler, Ameri...
Article

Ring shadow (disambiguation)

Ring shadows are radiographic signs seen on either chest x-rays or on upper gastrointestinal fluoroscopy: ring shadow (chest) ring shadow (abdomen)
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Sandwich sign

A sandwich sign, sometimes known as a hamburger sign, refers to a mesenteric nodal mass, either para-aortic or not, giving an appearance of a hamburger. Confluent lymphadenopathy on both sides of the mesenteric vessels gives rise to an appearance described as the sandwich sign 2. The sign is sp...
Article

Seatbelt sign

The seatbelt sign is both a clinical and radiological sign. It is simply the presence of bruising/abrasions in the distribution of a seatbelt (i.e. horizontal and/or diagonal) across the abdomen, chest and sometimes neck.  A positive seatbelt sign, in combination with abdominal pain or tenderne...
Article

Sentinel loop

A sentinel loop is a focal area of adynamic ileus close to an intra-abdominal inflammatory process. The sentinel loop sign may aid in localizing the source of inflammation. For example, a sentinel loop in the upper abdomen may indicate pancreatitis, while one in the right lower quadrant may be ...
Article

Seurat spleen

Seurat spleen is an angiographic appearance seen following blunt trauma to the spleen. Multiple small punctate regions of intraparenchymal contrast extravasation lead to a spotted appearance. History and etymology The term refers to a likeness between the angiographic appearance and the artwor...
Article

Shading sign

Shading sign is an MRI finding typically seen in an endometrioma. It may also be seen with some endometrioid tumours (e.g endometrioid carcinoma of the ovary) It helps to distinguish endometriomas from other blood containing lesions (e.g. haemorrhagic corpus luteum cysts), with a sensitivity of...
Article

Small bowel faeces sign

The small bowel faeces sign (SBFS) can be observed on abdominal CT-scans. The sign has been described as a finding indicative of small bowel obstruction (SBO) or another severe small-bowel abnormality (i.e. metabolic or infectious disease). While the reported prevalence of the sign in SBO is low...
Article

Stierlin sign

The Stierlin sign refers to repeated emptying of the caecum, seen radiographically as barium remaining in the terminal part of the ileum and in the transverse colon. This occurs due to irritation of the caecum caused by M. tuberculosis.   See also gastrointestinal tuberculosis  Fleischner si...
Article

String of beads sign

The string of beads sign is the description typically given to the appearance of the renal artery in fibromuscular dysplasia (FMD) but may also be used to describe the appearance of splanchnic arteries in segmental arterial mediolysis (SAM). It refers to the appearance arising from the stenoses ...
Article

String of pearls sign

String of pearls sign can refer to: string of pearls sign on an abdominal radiograph of fluid-filled dilated small-bowel loops string of pearls sign on ultrasound in polycystic ovarian syndrome string of pearls sign for angiographic appearances in fibromuscular dysplasia 
Article

String of pearls sign (gastrointestinal)

The string of pearls (or beads) sign can be seen on upright or decubitus abdominal radiographs as well as on CT in patients with small bowel obstruction, increased intraluminal fluid, and slow resorption of intraluminal gas. It consists of an obliquely or horizontally oriented row of small gas ...
Article

String sign

The string sign may refer to: angiographic string sign gastrointestinal string sign string sign of parosteal osteosarcoma
Article

Target sign of intussusception

There are many target signs, one of which the the appearance of intestinal intussusception, also known as the doughnut sign. The appearance is generated by concentric alternating echogenic and hypoechogenic bands. The echogenic bands are formed by mucosa and muscularis whereas the submucosa is ...
Article

Target sign of pyloric stenosis

The target sign of pyloric stenosis is a sign seen due to hypertrophied hypoechoic muscle surrounding echogenic mucosa, seen in pyloric stenosis. This is likened to that of a target. See also antral nipple sign cervix sign of pyloric stenosis shoulder sign of pyloric stenosis
Article

Tear drop sign of the superior mesenteric vein

Tear drop sign of the superior mesenteric vein  is one of the important signs in the staging of pancreatic adenocarcinoma . Its importance lies in its diagnosis as well as prognostic significance . This sign is used in assessing the resectability of pancreatic cancer. Radiographic appearance C...
Article

Thumbprinting

Thumbprinting is a radiographic sign of large bowel wall thickening, usually caused by oedema, related to an infective or inflammatory process (colitis). The normal haustra become thickened at regular intervals appearing like thumbprints projecting into the aerated lumen. Pathology Aetiology ...
Article

Troisier sign

Troisier sign is the clinical finding of a hard and enlarged left supraclavicular node (Virchow node), and is considered a sign of metastatic abdominal malignancy. Terminology It is sometimes referred to as Virchow node, which is the name given by Dr Rudolf Virchow (1821-1902), a German pathol...

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