<prompt> All of the following statements hold true for melanoma of vulva except :It is the 2nd most common vulval cancerMC site is labia majoraMay arise from junctional nevusHas a poor prognosis  <response>: Melanoma of vulva accounts for 3-5 of all vulval tumors It may arise de novo,but some arise from a pre-existing juctional naevus. occur frequently on clitoris or labia minora have poor prognosis Reference : textbook of gynaecology Sheila balakrishnan, 2nd edition, pg no: 292,293 