Becker's nevus coexistent with connective-tissue nevus.

Becker's nevus (BN) has been reported in association with smooth-muscle hamartoma, and an acneiform eruption and underlying structural anomalies of bone and soft tissues. We report a case of BN coexistent with a large connective-tissue nevus (CTN) on the right shoulder of a 74-year-old man. Whether this phenomenon represents the mere chance occurrence of two distinct cutaneous hamartomatous processes coexistent in the same anatomic site, an exaggerated manifestation of minor dermal changes previously described, or an association heretofore unrecognized due to the often subtle clinical and histologic features of both BN and CTN, is conjectural.