“…The differential diagnoses include inflammatory ulcers, lichen sclerosus, plaque psoriasis, and other sexually transmitted diseases, such as common herpes simplex, chancroid, granuloma inguinale, lymphogranuloma venereum, and syphilitic chancres. The disease may be mistaken for squamous cell carcinoma, melanoma, extramammary Paget's disease, cutaneous tuberculosis, and Behçet's disease …”