Diagnosis?
A 27 year-old man presented with a slow-growing, asymptomatic, 15cm sized well-circumscribed lesion on his upper back, consisting of several small, follicle-centred, discrete to coalescing, brownish-black to bluish macules. The lesion is since birth and increasing in size since last 2 years with no h/ o itching or any other complaint. The lesion demonstrated multiple, soft, well-circumscribed papules and nodules, with overlying follicular pigmentation. There was no hypertrichosis or underlying musculoskeletal defect.