All of the following statements hold true for melanoma of vulva except :
High-Yield Explanation
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