Eruption of Multiple Linear Hyperpigmented Plaques

A 28-year-old man presented for evaluation of an intensely itchy rash of 5 days' duration involving the face, trunk, arms, and legs.The patient recently had been diagnosed with classical Hodgkin lymphoma and was started on a biweekly chemotherapy regimen of adriamycin, bleomycin, vinblastine, and dacarbazine 3 weeks prior.He reported that a red, itchy, papular rash had developed on the hands 1 week after starting chemotherapy and improved with antihistamines.Symptoms of the current rash included night sweats, occasional fever, substantial unintentional weight loss, and fatigue.He had no history of urticaria, angioedema, anaphylaxis, or nail changes.Physical examination revealed widespread, itchy, linear and curvilinear hyperpigmented plaques on the upper arms, shoulders, back (top), face, and thighs, as well as erythematous grouped papules on the bilateral palms (bottom).There was no mucosal or systemic involvement.WHAT'S YOUR DIAGNOSIS?a. dermatitis artefacta b.