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Case Reports
. 2020 Nov;70(11):876-880.
doi: 10.1111/pin.13006. Epub 2020 Sep 3.

Peritoneal adenomatoid (microcystic) mesothelioma

Daisuke Mori  1 , Shinichi Kido  1 , Masatsugu Hiraki  2 , Kenji Sumi  2 , Norio Ureshino  3 , Masanori Masuda  1 , Kazuki Nabeshima  4 , Michiaki Akashi  1
Affiliations
Case Reports

Peritoneal adenomatoid (microcystic) mesothelioma

Daisuke Mori et al. Pathol Int. 2020 Nov.

Abstract

There are several reports of pleural adenomatoid (microcystic) mesothelioma, but peritoneal adenomatoid mesothelioma is extremely rare. A 64-year-old Japanese woman presented with no symptoms and no asbestos exposure history. An abdominal computed tomography scan revealed multiple hypervascular masses on the liver surface, pelvic cavity and anterior peritoneum. Over 10 pieces of the multiple resected tumors showed numerous microcysts composed of a bland mesothelial cell background with rich capillary vessels. Focally, atypical cells with bizarre nuclei with prominent nucleoli were observed. Adenomatoid mesothelioma was suspected based on histochemical, immunohistochemical and fluorescence in situ hybridization findings. The tumors relapsed 4 years later and metastasized to the lung, but the patient remains alive 7 years after the first tumor resection surgery. Although the prognosis of adenomatoid mesothelioma of pleural origin is poor, the progression of this peritoneal case is slow.

Keywords: adenomatoid mesothelioma; microcystic mesothelioma; peritoneum.

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References

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