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Kleine suspekte Prostataläsionen

Histologische und immunhistochemische Untersuchungen — Bericht aus dem uropathologischen Konsiliardienst

Small suggestive lesions of the prostate

Histological and immunohistochemical analyses — Report of the uropathology consultation service

  • Schwerpunkt: Prostatapathologie
  • Published:
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Zusammenfassung

Die Entnahme von Stanzbiopsien aus der Prostata und damit auch die Zahl von Diagnosen aus der Grauzone haben in den letzten Jahren deutlich zugenommen. Letztere bereiten aber sowohl dem Urologen als auch dem Pathologen Probleme, da sie in den üblichen Diagnose- und Therapieschemen nicht enthalten sind. Um das kleine „2- oder 3-Drüsen-Karzinom“ als Diagnose zu sichern, wurden an 1041 Prostatafällen aus dem Konsiliardienst für Uropathologie die Diagnosen der Einsender mit den endgültigen Diagnosen verglichen. Dazu wurden neue, dünne HE-Schnitte angefertigt und, wenn die atypischen Drüsen noch vorhanden waren, auch immunhistochemische Analysen angeschlossen. In 61,6% konnte die Diagnose eines Adenokarzinoms histologisch gesichert werden. In der immunhistochemischen Kombination von negativem Ausfall der Basalzellmarker und kräftiger Expression des Tumormarkers P504S aus der Einsendergruppe suspekter Befund wurden die Diagnosen atypische mikroglanduläre Proliferationen oder Verdacht auf Karzinom gestellt. 99% der vordiagnostizierten Prostatakarzinome wurden bestätigt. 27,9% zusätzliche Prostatakarzinome aus der Grauzone „suspekt oder Verdacht auf“ konnten gesichert werden. Den betroffenen Patienten blieben damit mehrfache Kontrollbiopsien erspart, und sie konnten einer definitiven Therapie zugeführt werden.

Abstract

Punch biopsies have been taken from the prostate with increasing frequency in recent years, with a resulting increase in the number of diagnoses made. To check the diagnosis of “small two- or three-gland carcinoma” we prepared new H&E sections and, when the atypical glands were no longer available, also performed immunohistochemical analyses in 1,041 cases referred to our uropathology consultation service, comparing the diagnoses supplied by the referring doctors with the final diagnoses. In 61.6 of these cases histology confirmed the diagnosis of adenocarcinoma of the prostate; the diagnosis recorded when the basal cell marker was absent and the tumour marker P504S was strongly expressed was atypical microglandular proliferation or suspected carcinoma. Previous diagnoses of prostatic carcinoma were confirmed in 99% of cases. In this way we also confirmed a further 27.9% of cases of prostate carcinoma in the grey area of diagnoses endorsed “suggestive” or “suspected”. The patients concerned were thus spared multiple screening biopsies and were assigned for definitive treatment.

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Helpap, B. Kleine suspekte Prostataläsionen. Pathologe 26, 398–404 (2005). https://doi.org/10.1007/s00292-005-0787-9

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