Cystic lymphangioma presenting as an ovarian mass in an adolescent: A case report and literature review.

Cystic lymphangiomas of the abdominal cavity are rare benign lymphatic malformations that can be difficult to distinguish from other cystic abdominal tumors on preoperative imaging. The present study reported a rare case of a giant abdominopelvic cystic lymphangioma in a 16-year-old female who presented with abdominal pain following exercise and was initially suspected to have a benign ovarian tumor. Despite comprehensive imaging evaluation, however, a definitive diagnosis could not be established preoperatively. The final diagnosis of abdominal cystic lymphangioma was confirmed by histopathological examination following surgical resection. The present case has highlighted the rarity and diagnostic challenge of differentiating abdominal cystic lymphangiomas from large benign ovarian tumors in adolescents. It underscores the importance of maintaining a broad differential diagnosis when evaluating abdominopelvic cystic masses in young females. Surgical resection remains the cornerstone of treatment and is associated with favorable outcomes, and regular postoperative follow-up is essential to detect recurrence.