Neoplasias Quisticas del Páncreas

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1 SEAP -Aproximación Práctica a la Patología Gastrointestinal- Madrid, 26 de mayo, 2006 Neoplasias Quisticas del Páncreas Gregory Y. Lauwers, M.D. Director, Service Massachusetts General Hospital Harvard Medical School glauwers@partners.org

2 Pancreatic Cystic Neoplasms 576 Cystic Tumors of the Pancreas Massachuestts General Hospital MGH (n=576) 35% Intraductal Papillary Mucinous Neoplasm 3% Other * 5% Cystic Islet Cell Tumor 23% Mucinous Cystic Neoplasm 3% Solid Pseudopapillary Neoplasm 9% Mucinous Cystadenocarcinoma 22% Serous Cystadenoma * lymphangioma, dermoid cyst, cystic acinar cell acrcinoma, epithelial simple cyst.

3 Intraductal Papillary Mucin-Producing Neoplasms (IPMNs)

4 Intraductal Papillary Mucin-Producing Neoplasms (IPMNs) Papillary proliferations of neoplastic mucin secretory cells that arise in the main pancreatic duct or its major branches. Median age:6 th- 7th decade (mean: 68 yrs). 1-3% of exocrine pancreatic neoplasms (incidence rate <1 per 100,000) Increase in diagnosis parallels the wider use of sophisticated imaging modalities.

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8 Side Branches Main Pancreatic Duct

9 Side Branch IPMNs

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12 Main+Side Branch (combined) IPMN

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14 Gastric Intestinal Pancreatobiliary Oncocytic

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16 MUC1 MUC2 MUC5AC MUC6

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18 MUC1 MUC5AC MUC2 MUC6

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20 MUC1 MUC5AC MUC2 MUC6

21 IPMN, oncocytic variant

22 Grading of IPMNs BENIGN BORDERLINE MALIGNANT IPMN-Adenoma IPMN-Borderline IPMN-Carcinoma (non invasive)

23 Ductal adenocarcinoma Colloid adenocarcinoma

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25 IPMNs - Prognosis 5-yr survival rate (60-83%). Excellent: adenoma and borderline tumor 5-year survival ~ 100%, provided that appropriate sampling has eliminated concurrent adenocarcinoma. Good for IPMN w/non-invasive carcinoma.

26 MUCINOUS CYSTIC NEOPLASM

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28 MUCINOUS CYSTIC NEOPLASM Exclusively in women (almost). No communication w/ ductal system. Columnar mucin-producing epith. supported by ovarian-type stroma. 5th decade (range:20-82)

29 Estrogen Receptor Progesterone Receptor

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31 MCN- Adenoma MCN-Borderline MCN-Carcinoma (non invasive)

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34 Prognosis of MCNs: Excellent: Noninvasive lesion - completely removed - regardless of the degree of cellular atypia. Poor: Inv. Mucinous cystadenocarcinoma 1) correlates w/ amount of invasion of tumor wall and surrounding tissues. 2) lower survival rate if >50 years.

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36 Serous Cystadenoma

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40 PAS

41 Serous Cystadenoma Composed of various numbers of cystic structures lined by glycogen-rich cuboidal epithelium. Adults, F>>M (70% vs 30%). Age: yrs old, (median: 7th decade) Etiology and pathogenesis unknown. Asso. w/ Von Hippel-Lindau and chromosomal alterations (deletion /mutation) of 3p25 found in most cases.

42 9/03 4/04 Maximum Diameter (cm) for all tumors (n=24) Median rate of growth 12 = 0.60 cm/year Years Tseng JF. in press

43 Solid Serous Cystadenoma

44 Serous cystadenocarcinoma Gastric varices, invasion of stomach and splenic vein, jaundice, and palpable abdominal masses. Size: cm. Maintain a spongy appearance. Deceptive histology. Mild focal nuclear pleomorphism can be found. Perineural & vascular invasion, LN mets reported. Slow-growing - prolonged survival.

45 Solid pseudopapillary neoplasm

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50 Solid pseudopapillary neoplasm (SPN) "solid and cystic," "papillary cystic," "solid and papillary epithelial neoplasm. <10% of cystic pancreatic neoplasm. Benign - predilection for young women. Mean age 35 yrs (range 8 to 67). Etiology unknown differences in sex and age point to genetic and hormonal factors

51 ? Catenin CD10? 1-antitrypsin (chymotrypsin) VIM progesterone receptors (Chromogranin A) SYN (CA19.9) Pan-CK CD56

52 SPN-Prognosis Extremely good. > 95% cured after complete resection. Local spread to peritoneum and hepatic mets, not inconsistent w/ relatively indolent course and long disease-free periods.

53 Predictors of poor prognosis Venous invasion Nuclear atypia High mitotic activity Necrobiotic cell nests Geographic necrosis Sarcomatoid transformation.

54 Pancreatic Endocrine Neoplasms

55 Cystic Pancreatic Adenocarcinoma

56 Acinar Cystadenocarcinoma

57 Type Gender predilectio n Peak decades % of Cystic tumors Malignant potential / Natural history Serous cystadenoma F>>M 7th 32 to 39% Resection is curative. Serous cystadenocarcinoma is rare. Mucinous cystic neoplasm F>>M 5th 10 to 45% Resection is curative regardless of the degree of epithelial dysplasia. Poor prognosis when invasive adenocarcinoma is present. IPMN F=M 6-7th 21 to 33% Excellent prognosis for lesions showing only adenomatous and borderline cytologic atypia. Poor prognosis when invasive carcinoma is present. SPN F>>M 4th <10% Indolent neoplasm with rare nodal and extranodal metastases. Excellent prognosis when completely resected. Cystic endocrine neoplasm F=M 5-6th <10% Similar to solid neuroendocrine type. Ductal Adenocarcinoma with cystic degeneration M?F 6-7th <1% Dismal prognosis, similar to solid adenocarcinoma type. Acinar cell cystadenocarcinom a M>F 6-7th <1% Similar to solid type. Aggressive neoplasm with a slightly better prognosis than ductal adenocarcinoma

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