light bulb appearance

A term of art used in various specialties referring to a symmetrically bulbous structure or finding—also termed piriform, pear-shaped—the appearance of which has been likened to the incandescent light bulb
Ophthalmology A pattern characterised by piriform—light bulb-like—swellings of abnormal telangiectatic retinal vessels seen by fundoscopy in patients with Coats disease.
Orthopaedics Light bulb sign A morphology seen on a plain film of a posterior dislocation of the shoulder, which is almost invariably accompanied by a fracture of the medial part of an internally rotated head of humerus

light bulb appearance

Orthopedics A morphology seen on a plain film of a posterior dislocation of the shoulder, which is almost invariably accompanied by a fracture of the medial part of an internally rotated humeral head.
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