Fine wrinkles on the neck, chest, axilla, trunk, back, and upper arms

A 55-year-old black man presents for evaluation of fine wrinkles that had developed over the past year. Physical examination reveals diffuse areas offine wrinkling that run parallel to lines of cleavage on his neck, chest, axilla, trunk, back, and upper arms bilaterally. The affected skin has normal pigmentation and lacks erythema, induration, and atrophy. Lateral tension obliterates the wrinkling. The ...