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WHO Classification of Tumours
WHO Classification of Tumours of the Breast and Female Genital Organs
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Tavassoli FA, Devilee P (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Breast and Female Genital Organs.
3rd Edition
IARC Press: Lyon 2003





C48 - Retroperitoneum and peritoneum:
 
The number attached to each tumour is the ICD-O morphology code of the International Classification of Diseases for Oncology (ICD-O) [1] and the Systematized Nomenclature of Medicine (http://snomed.org).
/0 benign tumours
/1 unspecified, borderline or uncertain behaviour
/2 in situ carcinomas
/3 malignant tumours.

1. Fritz A, Percy C, Jack A, Shanmuragatnam K, Sobin LH, Parkin DM, Whelan S (Eds) International Classification of Diseases for Oncology. World Health Organization: Geneva 2000





Peritoneal mesothelial tumours
    9050/3 Mesothelioma, malignant
    9052/0 Epithelioid mesothelioma, benign
    9055/1 Cystic mesothelioma, NOS
    9054/0 Adenomatoid tumor, NOS

Smooth muscle tumour
     Leiomyomatosis peritonealis disseminata

Tumour of uncertain origin
    8806/3 Desmoplastic small round cell tumor

Epithelial tumours
    8461/3 Serous surface papillary carcinoma
    8480/6 Pseudomyxoma peritonei