Eruptive Erythematous Papules on the Forearms

A 44-year-old man presented to the dermatology department with multiple eruptive, nonconfluent, erythematous papules on the anterior forearms of 2 years' duration.The patient's medical history was notable for right-sided testicular cancer diagnosed in childhood and 3 excised basal cell carcinomas, the most recent of which was concurrent with the present case.The patient denied any recent pruritus, exposure to irritants, or use of over-the-counter medications.Physical examination was remarkable for numerous monomorphic, symmetric, nonconfluent, flesh-colored to slightly pigmented papules on the dorsal aspect of the forearms.No involvement of the fingers or lower extremities was observed.Two punch biopsies of representative lesions on the right and left forearms were taken.Histopathologic examination revealed eccrine ductal proliferations lined by cuboidal cells embedded within bundles of sclerotic collagen.WHAT'S YOUR DIAGNOSIS?a. acral eruptive syringoma b.Darier disease c. flat warts d.