<prompt> A patient presents with pain and cold insensitivity at the fingertip. There is a bluish discoloration under the nail. The most likely diagnosis is?NeurofibromaGlomus tumorTurret tumorRaynauds disease  <response>: Ans. B. Glomus tumorThe giveaway is the bluish colour under the nail. This is typical for the glomus tumor; this is a rare benign neoplasm arising from the glomus body a neuromyoarterial apparatus. It can be excised by lifting the nail up if under the nail plate with repair of the nail bed afterwards. 