CMTC appears as a marble-like or lace-like pattern on the surface of the skin, called mottling. This pattern looks similar to mottling of the skin seen in young infants when they are cold. However, in children with CMTC, the marbling is typically darker. It is always visible, even when the child’s skin is warm.
CMTC can affect the arms, trunk and face, but most often occurs on the legs.
The marble-like skin pattern may involve large areas of the body (generalized CMTC, left). It may be limited to a certain part of the body (localized CMTC, right).
The marble-like pattern can appear more obvious with activity, crying, or when skin is exposed to the cold. There may also be slight depressions in the skin (fat atrophy). Bulging veins within the affected area are sometimes seen in individuals with CMTC.