Malignant mesenchymal vaginal tumor mimicking pedunculated submucous myoma: A case report

INTRODUCTION: Vaginal mesenchymal cancer is one of the rarest cases, covering only 3% of all cases of vaginal malignancies. While risk factors are not heavily studied, genetic disorders and hereditary diseases have been stated to be responsible for the increasing incidence of vaginal mesenchymal carcinoma. The diagnosis of leiomyosarcoma could be done through anamnesis to find abnormal uterine discharge and pelvic pain and physical examination to find a protruding mass on the vagina, which then should be confirmed through a series of radiologic examinations and histopathological examinations. Due to its rarity, each case should be properly evaluated for its clinical manifestation, diagnostic results, and outcome of the treatment. CASE PRESENTATION: A 46-year-old woman came in with vaginal discharge and a protruding mass from the vagina without bleeding or urinary or defecation difficulties, which was suspected to be pedunculated submucous myoma. Based on pelvic USG and MRI, the mass was suspected to have originated from the vagina. Histopathology examinations from biopsy showed a possible mesenchymal malignant type. The patient then underwent total hysterectomy, bilateral salpingo-oophorectomy, and partial vaginectomy. Histopathological evaluation confirmed the diagnosis of leiomyosarcoma in the patient. DISCUSSION AND CONCLUSION: The patient was diagnosed with a vaginal malignant mesenchymal tumor stage II intraoperatively and underwent total hysterectomy and bilateral salpingo-oophorectomy. Leiomyosarcoma is not commonly diagnosed preoperatively, hence implying the importance of radiologic examination to do an early diagnosis prior to the histopathological analysis. Due to the rarity of vaginal mesenchymal malignancy, further studies are needed to increase understanding of this case.