Pityriasis lichenoides chronica (PLC) consists of asymptomatic red-brown papules with adherent scale. Diffuse involvement of the trunk and proximal extremities is typical. However, rare cases of localized PLC have been described including those involving the distal extremities only. Herein, we report a case of a 71 -year-old man with segmental PLC localized to a distal extremity. A 71 -year-old white man presented with a 6-week history of an asymptomatic eruption localized to the left dorsal foot and lower leg. There was no prior history of a similar eruption. Examination revealed sharply demarcated erythematous papules with overlying scale on the dorsal left foot and lower leg (Fig. 1). A biopsy was obtained (Fig. 2) which revealed interface dermatitis with colloid bodies, spongiosis and lymphocytic exocytosis. There was overlying compact hyperkeratosis and parakerato-sis. Within the dermis there was a lymphocytic peri-vascular infiltrate extending to the mid-dermal vascular plexus.
展开▼
