Bird beak sign (disambiguation)
Bird beak sign is used in many contexts to denote a rapid tapering to a point, reminiscent of a bird's beak. Described bird beak signs include:
 beak sign (arterial dissection)
 beak sign (pyloric stenosis)
 bird beak sign (esophagus)
 bird beak sign (right colon)
 bird beak sign (sigmoid colon)
 talar beak sign (talus)
 tectal beaking (midbrain)
 beak sign (ovary)
The term “beak sign” is also applied when a mass deforms the edge of an adjacent organ into a “beak” shape, suggesting that the mass arises from that organ^{1}. While an adjacent organ with dull edges suggests that the mass compresses the organ but does not arise from it.
Related Radiopaedia articles
Inspired signs

inanimate object inspired
 astronomical inspired
 ball of wool sign
 chain of lakes sign
 champagne glass pelvis
 CocaCola 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
 polkadot 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)
 bulletshaped vertebra
 cannonball metastases
 Cupid bow contour
 dagger sign
 double barrel sign
 halberd pelvis
 panzerherz
 pistol grip deformity
 sabersheath 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
 treeinbud
 water lily sign

fruit inspired
 apple core sign (disambiguation)
 applepeel 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
 pearshaped 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
 hidebound sign
 ivory vertebra sign
 leaping dolphin sign
 leopard skin sign
 moose head appearance
 panda sign
 pleural mouse
 raccoon eyes sign
 rat bite erosions
 rattail sign
 Scottie dog sign
 Snoopy sign
 stag's antler sign
 staghorn calculus
 tiger stripe sign
 zebra sign
 zebra stripe sign
 arthropods
 reptiles
 microorganisms
 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
 Hshaped vertebra
 H sign
 Jshaped 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
 Ufigure (pelvis)
 U sign (brain)
 V (inverted) sign (disambiguation)
 W hernia
 Xmarksthespot 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