Animal and animal produce inspired signs
Animal and animal produce inspired signs may sound a little silly, but the radiology literature is replete with such signs, some more fanciful than others.
On this page:
Fish and marine life
- cluster of black pearls sign
- endosteal scalloping: medullary cavity masses, e.g. multiple myeloma
- fish vertebra (also known as codfish vertebra): biconcave vertebrae as seen in osteoporosis
- fishtail deformity of the elbow: due to abnormal trochlear ossification following a distal humeral fracture in childhood
- fishtail pancreas: rare anatomic variant of the pancreas
- lobster claw sign of papillary necrosis
- manta ray sign of bladder exstrophy
- scallop sign of rheumatoid arthritis
- vertebral scalloping: may be anterior or posterior border
- turtleback sign (liver)
Birds
- bird beak sign of achalasia (also known as rat tail sign)
- beak sign of arterial dissection or of sigmoid volvulus
- eggshell calcification of silicosis and occasionally sarcoidosis
- gull wing appearance of erosive osteoarthritis
- hummingbird sign or penguin sign
- owl-eyes sign of anterior spinal cord infarction etc.
- pooping duck sign of triquetral fracture
- swan neck deformity of rheumatoid arthritis
- winking owl sign
Mammals
- anteater nose sign of calcaneonavicular coalition
- bat's wing
- pulmonary opacities, e.g. in alveolar edema
- 4th ventricle (Joubert anomaly and related syndromes)
- bear's paw sign: xanthogranulomatous pyelonephritis
- beaver tail liver
- Brahma bull sign: femoral neck osteochondroma
- buffalo chest: bilateral pneumothoraces due to abnormal communication between the pleural spaces
- bull's eye: evoked in the mind's eye by many a pathology
- bunny waveform sign: Doppler waveform in subclavian steal syndrome
- dog ear sign: fluid/blood in pelvic peritoneal recess
- dural tail: of meningioma and several other dura-based lesions
- ears of the lynx sign: hereditary spastic paraplegia
- eye of tiger sign: classical of Hallervorden-Spatz syndrome
- feline esophagus: horizontal striations seen on barium swallows as a variant of normal
- giraffe sign
- hidebound sign of gastrointestinal scleroderma
- ivory vertebra sign
- joint mouse: intra-articular loose body resulting from osteochondritis dissecans
- leather bottle stomach: of linitis plastica
- leopard skin sign or tigroid pattern
- moose head appearance of corpus callosal dysgenesis
-
panda sign
- of the midbrain in Wilson disease
- of sarcoidosis
- piglet sign of osmotic demyelination
- pleural mouse
- raccoon eyes sign
- rat bite erosions of gout
- rat tail sign of arterial dissection or of achalasia (also known as bird-beak sign)
- Scottie dog sign
- Snoopy sign
- staghorn calculus: struvite renal calculi
- tigroid pattern or leopard skin sign
- winking owl sign
- zebra sign: remote cerebellar hemorrhage
- zebra stripe sign: osteogenesis imperfecta
Arthropods
- abdominal cocoon: encapsulating peritoneal sclerosis
- butterfly fracture
- butterfly glioma: glioma crossing midline to the contralateral hemisphere
- butterfly shape of the grey matter of the spinal cord
- butterfly vertebra
- caterpillar sign: of pyloric stenosis
- spider web: intrahepatic veins in hepatic venous outflow obstruction
Reptiles
- cobra head sign of ureterocele
- snake-eye appearance: pathology of anterior horns of cervical grey matter
-
snake eyes
- appearance of the facial canal in the petrous temporal bone
- alternative name for owl-eyes sign of spinal cord infarction
- snake sign (or serpent sign)
- turtleback sign (schistosomiasis)
Micro-organisms
- plankton sign: diagnostic on ultrasound of an exudative pleural effusion
Mythical creatures
- cyclops lesion: usually post-ACL repair
-
medusa head
- of a developmental venous anomaly (DVA)
- also a sign of severe portal hypertension (i.e. caput medusae)
- Shmoo sign: left ventricular enlargement
Animal product foods
- cervical hamburger sign: normal cervical facet joints on axial CT
- head cheese sign of hypersensitivity pneumonitis
- honeycomb lung of UIP/pulmonary fibrosis
- ice cream cone sign of the middle ear ossicles
- ice cream cone sign of vestibular schwannoma
- mesenteric hamburger sign (also called sandwich sign): mesenteric nodal mass
- omental cake: metastases to omentum
- sausage digit: underlying inflammatory arthritis or dactylitis
- water bottle sign: massive pericardial effusion
Related Radiopaedia articles
Inspired signs
-
inanimate object inspired
- astronomical inspired
- ball of wool sign
- chain of lakes sign
- champagne glass pelvis
- Coca-Cola bottle sign
- coin lesion
- corduroy artifact
- corduroy sign
-
corkscrew sign (disambiguation)
- corkscrew sign (midgut volvulus)
- corkscrew sign (diffuse esophageal spasm)
- corkscrew sign (inner ear)
- dinner fork deformity
- fishhook ureters
- ghost triad (gallbladder)
- goblet sign
- ground glass opacity
- hatchet sign
- hockey stick sign (disambiguation)
- horseshoe (disambiguation)
- hourglass sign
- keyhole sign (disambiguation)
- leather bottle stomach
- Lincoln log vertebra
- mosaic appearance (disambiguation)
- napkin ring sign
- open book fracture
- pearl necklace sign
- polka-dot sign
- rachitic rosary
- ring shadow
- rugger jersey spine
- sack of marbles sign
- sail sign (disambiguation)
- scalpel sign
- spilled teacup sign
- stepladder sign (disambiguation)
-
string of pearls sign (disambiguation)
- string of pearls sign (abdominal radiograph of small bowel)
- string of pearls sign (polycystic ovarian syndrome)
- string of pearls sign (fibromuscular dysplasia)
- Tam o' Shanter sign
- telephone receiver deformity
- tombstone iliac wings
- Venetian blind sign
- water bottle sign
-
weapon and munition inspired signs
- bayonet deformity
- boomerang sign (disambiguation)
- bullet-shaped vertebra
- cannonball metastases
- Cupid bow contour
- dagger sign
- double barrel sign
- halberd pelvis
- panzerherz
- pistol grip deformity
- saber-sheath trachea
- scimitar syndrome
-
target sign (disambiguation)
- double target sign (hepatic abscess)
- eccentric target sign (cerebral toxoplasmosis)
- reverse target sign (cirrhotic nodules)
- target sign (cholangiocarcinoma)
- target sign (choledocholithiasis)
- target sign (hepatic metastases)
- target sign (intussusception)
- target sign (neurofibromas)
- target sign (pyloric stenosis)
- target sign (tuberculosis)
- trident appearance
- Viking helmet sign
- white pyramid sign
- windswept knees
- wine bottle sign
-
vegetable and plant inspired
- aubergine sign
- celery stalk appearance (disabiguation)
- coconut left atrium
- coffee bean sign
- cotton wool appearance
- drooping lily sign
- ginkgo leaf sign (disambiguation)
- holly leaf sign
- ivy sign
- miliary opacities
- mistletoe sign
- onion skin periosteal reaction
- pine cone bladder
- popcorn calcification
- potato nodes
- rice bodies
- rice grain calcification
- salt and pepper skull
- tree-in-bud
- water lily sign
-
fruit inspired
- apple core sign (disambiguation)
- apple-peel intestinal atresia
- banana and egg sign
- banana fracture
- banana sign
- berry aneurysm
- bowl of grapes sign
-
bunch of grapes sign (disambiguation)
- bunch of grapes sign (hydatidiform mole)
- bunch of grapes sign (bronchiectasis)
- bunch of grapes sign (IPMN)
- bunch of grapes sign (botryoid rhabdomyosarcoma)
- bunch of grapes sign (intracranial tuberculoma)
- bunch of grapes sign (multicystic dysplastic kidney)
- bunch of grapes sign (intraosseous hemangiomas)
- lemon sign
- pear-shaped bladder
- strawberry gallbladder
- strawberry skull
- watermelon skin sign
-
animal and animal produce inspired
- human
- fish and marine life
- birds
- mammals
- anteater nose sign
- antler sign
- bat wing opacities
- bear paw sign
- beaver tail liver
- Brahma bull sign
- buffalo chest
- bull's eye sign (disambiguation)
- bunny waveform sign
- claw sign
- dog ear sign
- dog leg sign
- ears of the lynx sign
- eye of tiger sign
- feline esophagus
- giraffe pattern
- hide-bound sign
- ivory vertebra sign
- leaping dolphin sign
- leopard skin sign
- moose head appearance
- panda sign
- pleural mouse
- raccoon eyes sign
- rat bite erosions
- rat-tail sign
- Scottie dog sign
- Snoopy sign
- stag's antler sign
- staghorn calculus
- tiger stripe sign
- zebra sign
- zebra stripe sign
- arthropods
- reptiles
- micro-organisms
- mythical creatures
-
food inspired
- Cheerio sign (disambiguation)
- chocolate cyst
- cottage loaf sign
- double Oreo cookie (glenoid labrum)
- doughnut sign (disambiguation)
- hamburger sign (spine)
- head cheese sign (lungs)
- honeycombing (lungs)
- ice cream cone sign (middle ear ossicles)
- ice cream cone sign (vestibular schwannoma)
- licked candy stick appearance (bones)
- linguine sign (breast implants)
- macaroni sign
- omental cake
- Oreo cookie (heart)
- pancake adrenal
- pancake brain
- pancake vertebra
- Polo mint sign
- salad oil sign (breast implants)
- sandwich sign (disambiguation)
- sandwich vertebra
- sausage digit
- spaghetti sign
- Swiss cheese sign
-
alphabet inspired
- C sign (MSK)
- delta sign (diambiguation)
- E sign
- H-shaped vertebra
- H sign
- J-shaped sella
- J sign (shoulder)
- L sign (brain)
- lambda sign (disambiguation)
- M sign
- omega epiglottis
- S sign of Golden
- tau sign
- T sign (diambiguation)
- U fibers
- U-figure (pelvis)
- U sign (brain)
- V (inverted) sign (disambiguation)
- W hernia
- X-marks-the-spot sign
- Y sign (epidural lipomatosis)
- Z deformity
-
Christmas inspired
- Christmas tree bladder in neurogenic bladder
- holly leaf sign in calcified pleural plaques
- ivy sign in leptomeningeal enhancement
- nutcracker esophagus in esophageal dysmotility
- shepherd's crook deformity of the femur in fibrous dysplasia
- snowcap sign in avascular necrosis
- snowman sign (disambiguation)
- snowstorm appearance in complete hydatidiform mole and testicular microlithiasis
- miscellaneous