CONTINUING EDUCATION IN TOXICOLOGIC PATHOLOGY REPRODUCTIVE SYSTEM
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1 CONTINUING EDUCATION IN TOXICOLOGIC PATHOLOGY REPRODUCTIVE SYSTEM ORGANIZED BY SOCIETY FOR TOXICOLOGIC PATHOLOGY IN INDIA (STPI) OCTOBER 29-31, 2010 The Atria Hotel, # 1, Palace Road, Bangalore
2 Harlan Laboratories Neoplasms of the Female Reproductive System of Rodents Klaus Weber, PhD, DVM, MSBiol Harlan Laboratories Ltd. Switzerland
3 Classification Harmonization: Dixon et al., 1999, Proliferative Lesions of the Ovary, Uterus, Vagina, Cervix and Oviducts in Rats. In: Guides for Toxicologic Pathology, STP/ARP/AFIP. Washington, DC Mann, P.C. et al., 1996, Proliferative Lesions of the Mammary Glands in Rats. In: Guides for Toxicologic Pathology, STP/ARP/AFIP. Washington, DC Boorman et al., Pathology of the Fisher Rat. Academic Press Maronot et al., Pathology of the Mouse, Cache River Press Mohr, U (ed): International Classification if Rodent Tumors. The Mouse. Springer Verlag Harlan Laboratories 2
4 Classification: Ovary Recommendations Hyperplasia: tubulostromal, cystic/papillary, sex cord stromal [diffuse mixed type; granulosa cell; mixed; Sertoli cell; theca cell] Adenoma, tubulostromal and Adenocarcinoma, tubulostromal Mesothelioma, malignant Cystadenoma and Cystadenocarcinoma Tumor, granulosa cell, benign and malignant Thecoma, benign and malignant Luteoma, benign Tumor, Sertoli cell, benign and malignant Tumor, sex cord stromal, mixed, benign and malignant Dysgerminoma (teratoma, benign or malignant) Carcinoma, yolk sac Choriocarcinoma Harlan Laboratories 3
5 Classification: Ovarian Lesions Only organ specific tumors are recommanded (harmonized), i.e. neoplasms arising in mesenchymal tissues are not listed under particular organs in the International Harmonization of Rat Nomenclature but under Soft Tissues and Others Differentiation between hyperplastic and neoplastic stromal sex cord lesions: - Focal hyperplasia: focal small, 2-3 mm - Diffuse hyperplasia: 2-3fold increased size of a normal ovary Harlan Laboratories 4
6 Ovary-Sex Cord Neoplasms: Granulosa Cell Tumor Variety of patterns: solid, cystic, tubular, occasionally sertoliform Resemble normal granulosa cells with round nucleus and coarse stippled chromatin Cytoplasm may become luteinized Malignancy: pleomorphism, increased mitosis, necrosis, innasion Differential Diagnose: Hyperplasia, Luteoma, Thecoma Harlan Laboratories 5
7 Rat: Granulosa Cell Tumor, benign Harlan Laboratories 6
8 Mouse: Granulosa Cell Tumor, benign Harlan Laboratories 7
9 Rat: Granulosa Cell Tumor, malignant Harlan Laboratories 8
10 Mouse: Granulosa Cell Tumor, malignant Harlan Laboratories 9
11 Ovary-Sex Cord Neoplasms: Thecoma Densely packed masses Fusiform, spindleshaped cells in whorls and nodular Areas of vacuolated cells may be present Malignancy: infiltrative growth pattern, invasion, atypia Differential Diagnose: Hyperplasia, Fibroma, Granulosa cell tumor, Luteoma Harlan Laboratories 10
12 Rat: Thecoma, benign Harlan Laboratories 11
13 Mouse: Thecoma, benign Harlan Laboratories 12
14 Hamster: Thecoma, benign Harlan Laboratories 13
15 Hamster: Thecoma, malignant Harlan Laboratories 14
16 Ovary-Sex Cord Neoplasms: Granulosa-Theca Cell Tumor Mixed neoplasm Partly dense areas of a particular cell type Differential Diagnose: Hyperplasia, Granulosa cell tumor, Thecoma Harlan Laboratories 15
17 Rat: Granulosa-Theca Cell Tumor, benign Harlan Laboratories 16
18 Mouse: Granulosa-Theca Cell Tumor, benign Harlan Laboratories 17
19 Hamster: Granulosa-Theca Cell Tumor, benign Harlan Laboratories 18
20 Ovary-Sex Cord Neoplasms: Luteoma Similar to granulosa cell tumor Neoplastic cells with abundant eosinophilic or vacuolated cytoplasm Intranuclear cytoplasmic invaginations Lobulation of tumor mass Differential Diagnose: Granulosa cell tumor, Thecoma Harlan Laboratories 19
21 Rat: Luteoma, benign Harlan Laboratories 20
22 Rat: Luteoma, benign Harlan Laboratories 21
23 Mouse: Luteoma, benign Harlan Laboratories 22
24 Ovary-Sex Cord Neoplasms: Sertoli s Cell Tumor Usually well circumscribed Irregular lobules Tubules composed of pale, vacuolated cells with indistict cell boundaries, seminiferous-like Malignancy: pleomorphism, increased mitosis, necrosis, invasion Differential Diagnose: Hyperplasia, Granulosa cell tumor,thecoma Harlan Laboratories 23
25 Rat: Sertoli s Cell Tumor, benign Harlan Laboratories 24
26 Rat: Sertoli s Cell Tumor, benign Harlan Laboratories 25
27 Mouse: Sertoli s Cell Tumor, benign Harlan Laboratories 26
28 Rat: Sertoli s Cell Tumor, malignant Harlan Laboratories 27
29 Rat: Sertoli s Cell Tumor, malignant Harlan Laboratories 28
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