Vulvar Hibernoma: an unusual lipomatous tumor in an adolescent

Abstract Background Lipomatous tumors of the vulva are exceedingly rare, particularly in adolescents. We describe the work-up and management of an adolescent girl who presented with a large, well-vascularized vulvar mass. Case A 14-year-old girl presented with a large vulvar mass of unclear etiology. Magnetic resonance imaging of this mass revealed an ill-defined, well-vascularized mass with fat signal characteristics suggestive of a lipomatous tumor that was concerning for malignancy. We performed complete resection of the mass, and histologic evaluation revealed a vulvar hibernoma. There have been no signs of recurrence 1 year later. Summary and Conclusion Although rare, a hibernoma of the vulvar region may present in adolescence and may be concerning for malignancy on imaging. Complete resection of these tumors is recommended for definitive diagnosis and treatment.