Skin S.T.D. a9932ab3 Groove sign is seen in? A Chancroid B Syphilis C LGV D Psoriasis High-Yield Explanation Ans. (c) LGVRef: Rook's 8/e, p 34.33, Greenberg's Text-Atlas of emergency medicine by Michael I. Greenberg p. 367, Nord guide to rare diseases, p 8