Prevalence and pathological characteristics of benign and sarcomatous lesions in the abdominal cavity and retroperitoneum among adult at Thammasat University Hospital


  • Natcha Poungmeechai Department of Pathology, Faculty of Medicine, Thammasat University
  • Jutatip Kintarak Department of Pathology, Faculty of Medicine, Thammasat University


soft tissue tumors, abdominal cavity, retroperitoneum, clinicopathological findings


Soft tissue tumors pose a challenge due to their rarity and complex diagnostic process. This pilot study aimed to investigate the prevalence and clinicopathological features of soft tissue tumors in the abdominal cavity and retroperitoneum in adults at Thammasat University Hospital. This descriptive retrospective study included patients aged at least 15 years who had undergone core needle biopsy and were diagnosed with soft tissue tumors according to the WHO classification of soft tissue and bone 2020. A total of 56 cases were collected by the Department of Pathology over 5 years from January 2017 to December 2021. Benign tumors accounted for 41.1% and sarcomas for 58.9% of the cases. The mean age of the patients was 53.5 years, ranging from 15 to 92 years, with 25 (44.6%) cases being female and 31 (55.4%) cases male. Most tumors were located in the abdominal cavity, with the majority being larger than 5 cm. Among sarcomas, 21.2% exhibited multiple foci. The most common sarcoma identified was gastrointestinal stromal tumor (GIST), while the most common benign tumor was PEComa. Incidental findings were observed in 35.7% of cases. The prevalence and clinicopathological findings of this study were consistent with previous research findings.


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How to Cite

Poungmeechai N, Kintarak J. Prevalence and pathological characteristics of benign and sarcomatous lesions in the abdominal cavity and retroperitoneum among adult at Thammasat University Hospital. J Med Health Sci [Internet]. 2024 Apr. 30 [cited 2024 Jul. 22];31(1):168-75. Available from:



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