Cutis marmorata telangiectatica congenita (CMTC) is a congenital localized or generalized vascular anomaly characterized by a persistent cutis marmorata pattern with a marbled bluish to deep purple appearance, spider nevus-like telangiectasia, phlebectasia and, occasionally, ulceration and atrophy of the affected skin.

A type of retinal detachment arising due to a combination of contracting retinal membranes, abnormal vitreoretinal adhesions, and vitreous changes. It is usually seen in the context of diseases that induce a fibrovascular response, e.g. diabetes.