Inguinal intranodal blue nevus: a case report.

Inguinal intranodal blue nevus is a rare lesion, but awareness of the condition will avoid a mistaken diagnosis of metastatic melanoma. The authors describe the case of a 40-year-old woman in whom an inguinal node blue nevus was discovered incidentally during radical vulvectomy for squamous cell carcinoma. They describe the characteristic light and electron microscopic features. With increased awareness of this lesion the authors believe it will be found in lymph-node chains other than the inguinal and axillary ones previously reported.