Rarities in ocular sarcoidosis.

OCULAR involvement in sarcoidosis is both varied and frequent (Longcope and Freiman, 1952). The incidence is about 30 to 40 per cent. (Levitt, 1941; Woods and Guyton, 1944; Gifford and Krause, 1949; Longcope and Freiman, 1952). Almost all the structures in and around the eye may become involved: skin of the eyelid, eye muscles, orbit, uvea, and optic nerve. The commonest lesion is uveitis, which is usually painless and bilateral and may be accompanied by nodules on the iris. The parotid gland may be involved concurrently with either the lacrimal gland or the uveal tract, producing the syndromes of Mikulicz or Heerfordt respectively. Moreover, cerebral sarcoidosis (Colover, 1948; Pennell, 1951; Aszkanazy, 1952; H6ok, 1954) may lead to puzzling ocular and peri-ocular symptoms.