Primary malignant deciduoid mesothelioma
(PMDM) is an extremely rare variant of primary mesothelioma
representing less than 5% of mesotheliomas
For both pleural and peritoneal mesotheliomas
in the SEER (US SEER National) Cancer Database, we calculated life expectancy based on various patient characteristics.
Previous studies have reported that lymph node metastasis was significantly more common in epithelial and biphasic containing tumors than in sarcomatoid mesotheliomas
. The rate of any extrapleural spread was high across all tumor types, with no statistically significant differences .
demonstrated this sampling limitation and frequent misclassification of nonepithelioid mesotheliomas
and concluded that adequate surgical biopsies increased the accuracy over radiology-guided needle core/FNA biopsies .
Role of immunohistochemistry in distinguishing epithelial peritoneal mesotheliomas
from peritoneal and ovarian serous carcinomas.
are rare tumors of mesodermal origin that arise from the serosal lining of the pleural, peritoneal, and/or pericardial cavities, as well as the vaginal and testicular tunics.
Sarcomatous cells have proven to be more resistant to treatment than other types of mesotheliomas
. Surgery in particular can be difficult because sarcomatoid tumours are very rigid and often metastazise to the chest wall, making them difficult to remove.
20% to 33% of all mesotheliomas
(one fifth to one third) arise from the peritoneum.56 The diagnosis of peritoneal mesothelioma
is often delayed due to a long latent period between onset and symptoms and the common and non specific clinical presentation.
The expression of both epithelial and mesenchymal markers is a constant feature in malignant mesothelioma
, which may be related to the origin of mesothelial cells.[sup.8] The histopathologic differential diagnoses of malignant urogenital mesotheliomas
includes metastatic adenocarcinoma, papillary mesothelial hyperplasia, carcinoma of the rete testis and embryonal carcinoma.
Immunohistochemical profile of malignant mesotheliomas
of the tunica vaginalis: A study of 20 cases.
METHODS: For all countries with available data on mesothelioma
frequency and asbestos use (n = 56), we calculated the 15-year cumulative number of mesotheliomas
during 1994-2008 from data available for fewer years and assessed its relationship with levels of cumulative asbestos use during 1920-1970.
About three-fourths of mesotheliomas
start in the chest cavity.