Myxoid cyst. This is a soft skin coloured or translucent nodule, which grows on the terminal phalanx and fluctuates in size. It causes a longitudinal furrow of the nail plate.

Asymptomatic lesions can be left untreated. Persistent digital pressure on the lesion sometimes results in resolution. Intralesional triamcinolone, cryotherapy, incision and drainage, or excision may eradicate it. Recurrence is frequent.