<prompt> A child came with similar lesions over elbows, shaft of penis and forearm. shows pinhead discrete but grouped papules over right elbow. Diagnosis?Lichen nitidusLichen planusScabiesPhrynoderma  <response>: Lichen nitidus : Grouped pin head sized papules on- Elbow- Forearm- Dorsum of hand- Shaft of penis Histology shows :Elongated rete ridgesLymphocytic infiltrateTogether they give claw clutching appearance Phrynoderma: keratotic papules with intrafollicular plugging on extensor surfaces. 