Mucocolpos due to complete transverse septum in middle third of vagina in a 17‐year‐old girl

A 17-year-old girl had a large abdominopelvic mass (12 × 8 cm) extending from vagina, due to the presence of a complete transverse vaginal septum in its middle third which on resection facilitated the drainage and disappearance of the mass finally diagnosed as a case of mucocolpos.