Zusammenfassung
Die neue WHO-Klassifikation der Tumoren des weiblichen Genitale bringt einige, insbesondere prognostisch und therapeutisch relevante Änderungen mit sich: Es erfolgt eine Rückkehr zum Begriff Borderlinetumor. Implantate werden wieder wie früher unterteilt in nichtinvasive Implantate vom epithelialen oder vom desmoplastischen Typ. Invasive extraovarielle Implantate werden als low-grade seröses Karzinom (LGSC) klassifiziert. Die ehemaligen seromuzinösen Karzinome gehören jetzt zu den endometrioiden Karzinomen (seromuzinöser Subtyp). Neue Entitäten der Ovarialkarzinome sind das Mesonephric-like-Adenokarzinom, das undifferenzierte und dedifferenzierte Karzinom sowie das gemischtes Karzinom. Die Klassifikation der neuroendokrinen Neoplasien erfolgt unabhängig ihrer Lokalisation analog der pulmonalen und gastrointestinalen neuroendokrinen Neoplasien. Das endometrioide Endometriumkarzinom kann in 4 molekulare Subtypen klassifiziert werden, welchen eine wesentliche prognostische Bedeutung zukommt. Als neue Subtypen sind das muzinöse Karzinom vom intestinalen Typ und das Mesonephric-like-Adenokarzinom hinzugekommen. Stromasarkome des Endometriums werden anhand bestimmter molekularer Alterationen weiter subklassifiziert. Bei Adeno- (AC) und Plattenepithelkarzinomen (PEC) des unteren weiblichen Genitales werden HPV-assoziierte von HPV-unabhängigen Karzinomen unterschieden. Eine blockartige Färbung für p16 ist der akzeptierte immunhistochemische Surrogatmarker. Ein Grading ist für PEC nicht angegeben. Bei HPV-assoziierten AC der Cervix uteri erfolgt die prognostische Einschätzung mittels des Invasionsmusters (sog. Silva-Pattern). Bei serösen Karzinomen in der Cervix uteri handelt es sich um Endometriumkarzinome mit Zervixinfiltration.
Abstract
The new WHO classification of tumors of the female genitalia entails some changes, especially those of prognostic and therapeutic relevance: there is a return to the term borderline tumor. Implants are again subdivided into noninvasive implants of the epithelial or desmoplastic type as before. Invasive extraovarian implants are classified as low-grade serous carcinoma (LGSC). Former seromucinous carcinomas are now classified as endometrioid carcinomas (seromucinous subtype). New entities of ovarian carcinomas are mesonephric-like adenocarcinoma, undifferentiated and dedifferentiated carcinoma, and mixed carcinoma. The classification of neuroendocrine neoplasms is analogous to that of pulmonary and gastrointestinal neuroendocrine neoplasms, regardless of their location. Endometrioid endometrial carcinoma can be classified into four molecular subtypes, which have significant prognostic significance. New subtypes include mucinous carcinoma of the intestinal type and mesonephric-like adenocarcinoma. Stromasarcomas of the endometrium are further subclassified based on specific molecular alterations. Adenocarcinomas (ACs) and squamous cell carcinomas (PECs) of the lower female genital tract are distinguished from HPV-associated and HPV-independent carcinomas. Block-like staining for p16 is the accepted surrogate immunohistochemical marker. Grading has not been reported for PEC. For HPV-associated AC of the cervix uteri, prognostic assessment is based on the pattern of invasion (so-called Silva pattern). Serous carcinomas in the cervix uteri are endometrial carcinomas with cervical infiltration.
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Mayr, D., Schmoeckel, E., Höhn, A.K. et al. Aktuelle WHO-Klassifikation des weiblichen Genitale. Pathologe 42, 259–269 (2021). https://doi.org/10.1007/s00292-021-00933-w
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DOI: https://doi.org/10.1007/s00292-021-00933-w