“…In 22 of these 26 cases, the etiological factors were confirmed or speculated as perineal injuries after vaginal delivery (11 cases), 7–16 genital herpes infection (eight cases), 17–23 female circumcision (two cases), 24,25 and genital graft‐versus‐host disease after hemopoietic stem cell transplantation (one case) 26 . In the remaining four cases, 3–6 the causes were unclear (Table 1). In the four cases hitherto reported, the diagnosis was made at age 18, 20, 22, and 30 years of age and complaints were coital difficulty or urinary retention.…”