Ovarian microcystic stromal tumor (MST) is characterized by microcysts, solid cellular regions with lobulated growth, and collagenous or fibrous stroma forming hyaline plaques. While several reports have evaluated the unique pathologic and immunohistochemical profile of these tumors, there has been limited description of the radiologic findings of ovarian microcystic stromal tumor in the literature. We present a case of a 66 year old female who presented for evaluation of a new cystic pelvic mass found to have ovarian microcystic stromal tumor. To our knowledge, this is one of the first reports to evaluate the radiologic features associated with this tumor. An enhanced understanding of the correlation between imaging appearance and specific histopathologic findings may aid in the early recognition of this rare neoplasm.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6019857PMC
http://dx.doi.org/10.1016/j.gore.2018.05.004DOI Listing

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Article Synopsis
  • Microcystic stromal tumors (MCST) are rare tumors associated with unique features and immunophenotypes, and their MRI characteristics have not been extensively studied.
  • A case report describes a 24-year-old female with familial adenomatous polyposis (FAP) who presented with lower abdominal pain and was found to have a 19 cm ovarian tumor on imaging; MRI showed distinct characteristics leading to a diagnosis of MCST after surgery.
  • The findings suggest that while MCST is typically benign, regular screenings in patients with FAP can help manage risks and identify such tumors earlier, potentially reducing abdominal pain episodes.
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