Large uterine leiomyoma with smooth muscle tumour of uncertain malignant potential: a case report

Abhinibesh Chatterjee; Polly Chatterjee; Avishek Bhadra; Rumela Biswas

doi:10.18203/2320-1770.ijrcog20250541

Authors

Abhinibesh Chatterjee Department of Gynaecology and Obstetrics, Eskag Sanjeevani Baghbazar, Kolkata, West Bengal, India
Polly Chatterjee Department of Gynaecology and Obstetrics, Eskag Sanjeevani Baghbazar, Kolkata, West Bengal, India
Avishek Bhadra Department of Gynaecology and Obstetrics, R. G. Kar Medical College and Hospital, Kolkata, West Bengal, India https://orcid.org/0009-0005-1537-5205
Rumela Biswas Department of Gynaecology and Obstetrics, Medical College, Kolkata, West Bengal, India https://orcid.org/0009-0007-2883-1833

DOI:

https://doi.org/10.18203/2320-1770.ijrcog20250541

Keywords:

STUMP, Smooth muscle tumour of uncertain malignant potential, Uterine neoplasm, Fibroid, Myomectomy

Abstract

Smooth muscle tumours of uncertain malignant potential (STUMP) are a category of uterine neoplasms that do not meet the criteria for benign or malignant tumours, potentially representing an intermediate stage between leiomyomas and leiomyosarcomas. A 26-year-old nulliparous woman presented with heavy menstrual bleeding and an abdominal mass, with preoperative imaging suggesting a benign uterine myoma. Following a laparoscopic myomectomy, histological analysis revealed STUMP, characterized by a low mitotic index and marked nuclear pleomorphism without necrosis. The patient was advised to conceive soon and plan for definitive surgery after completing her family. She later delivered via elective caesarean section at 35 weeks and is currently recovering well. STUMP often mimics benign leiomyomas and is usually diagnosed post-surgery, complicating preoperative assessment. Recurrence rates vary, particularly in younger patients, emphasizing the need for individualized management strategies that balance fertility preservation with monitoring for recurrence. Regular follow-ups are essential for optimal care.

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