“…Regarding the differential diagnosis of vulvar PNT or extraosseous Ewing's sarcomas, the diagnoses of genital herpes, inguinal granuloma caused by Klebsiella granulomatis, chancroid due to Haemophilus ducreyi, rhabdomyosarcoma, malignant fibrous histocytoma, leiomyosarcoma, epithelioid sarcoma, neuroblastoma, Paget's disease of the vulva, lymphoma, small cell carcinoma, malignant melanoma (~10% of vulvar tumors), Merkel cell carcinoma, squamous cell carcinoma of the vulva, Bartholin's gland cyst, Bartholin's gland carcinoma, basal cell carcinoma of the vulva, vulvar wart carcinoma and metastases from other organs should first be excluded (26,33,56).…”