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Incidental finding of multiple well‐differentiated papillary mesotheliomas in peritoneum
Author(s) -
Jakobsen Mark,
Engvad Birte,
Jensen Thor,
Marcussen Niels
Publication year - 2016
Publication title -
apmis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0903-4641
DOI - 10.1111/apm.12503
Subject(s) - peritoneum , pathology , medicine , papillary carcinoma , thyroid , thyroid carcinoma
We present a case of multiple well‐differentiated papillary mesotheliomas ( WDPM ) in the peritoneum found incidentally in a 63‐year‐old man with urothelial carcinoma of the bladder. When multiple tumors are seen, malignant mesothelioma should be excluded by histopathological examination as this may have a similar focal appearance to WDPM . True stromal invasion is by far the most reliable criterion of mesothelial malignancy. In doubtful cases, a conservative diagnostic approach has been recommended. Compared to malignant mesotheliomas, WDPM s are rare and have a relatively indolent clinical course with a good prognosis. Great care is needed when diagnosing mesothelial proliferations, given the crucial nature of a benign vs malignant diagnosis. No standardized treatment has yet been established.