A Labial Mass Demonstrated With Sonography and MRI Diagnostic Correlation

Vaginal and labial masses are uncommon and can have a wide range of differentials, both benign and malignant. Included in these masses are hemangiomas, papillomas, mucosal polyps, leiomyomas, and carcinomas. A case report is presented of a patient with a history of surgically treated squamous cell carcinoma, of the vaginal wall, who returned years later with a new palpable labial mass. The initial sonogram pertaining to the new palpable lump showed what was believed may be an irregular, hypoechoic structure, with internal vascularity. A second sonogram conducted several weeks later, in the same region, revealed different findings. The same area imaged several weeks earlier, reevaluated with sonography, demonstrated an ovoid-shaped complex fluid collection with an irregular margin. It contained multiple lacy septa and reflections, without evidence of internal arterial or venous flow. The mass was suspected to be a probable hematoma; however, a magnetic resonance imaging examination was conducted a few days later and the results characterized the mass as a seroma.