A ganglion cyst is a round, fluid-filled lump of tissue that appears along tendons or joints. Learn more about causes, symptoms, and treatment.

Transillumination is when doctors shine a light on your body part to diagnose various conditions. ... The following conditions may be visible through transillumination: Breast cysts or lesions.

A four-week-old, full-term male infant presented with a mass at the base of his neck (Panel A). The growth of the lesion, evident since his birth after an uncomplicated pregnancy, had been commensu ...