J Korean Soc Radiol.  2023 Jul;84(4):958-963. 10.3348/jksr.2022.0095.

Primary Peritoneal Psammocarcinoma Misdiagnosed as an Heterotopic Ossification: A Case Report

  • 1Department of Radiology, Fatima Hospital, Daegu, Korea
  • 2Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Korea


Primary peritoneal psammocarcinoma is a rare type of serous carcinoma that is characterized by the massive formation of psammoma bodies and the invasion of adjacent organs. A 55-year-old female who previously underwent a hysterectomy presented to the emergency room with severe abdominal pain. Contrast-enhanced CT revealed an intra-abdominal calcific mass. Initially, it was thought to be a heterotopic ossification due to the previous pelvic surgery with intact ovaries. However, this was diagnosed as a primary peritoneal psammocarcinoma. Primary peritoneal psammocarcinoma is a very rare disease entity that should be considered a differential diagnosis in patients with normal ovaries, massive ossification in the pelvic cavity, and calcific peritoneal nodules.


Peritoneum; Neoplasm; Calcification
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