Papillary cystic tumors of the pancreas. Assessment of their malignant potential.

Abstract:

BACKGROUND:Although the biologic characteristics of papillary cystic tumors (PCT) generally indicate a good prognosis, a malignant form has been reported. METHODS:Twenty-two examples of PCT were examined to assess their malignant potential by histologic, flow cytometric, and immunohistochemical studies. RESULTS:Three had hepatic, peritoneal, and/or lymph node metastases (metastasizing tumors [MT]); the other 19 PCT had no such metastatic features (nonmetastasizing tumors [NMT]). Venous invasion was detected in all three MT and two NMT. Compared with the 19 NMT, the MT had a higher nuclear grade and more prominent necrobiotic nests characterized by aggregates of cells with pyknotic nuclei and eosinophilic cytoplasm. In the flow cytometric analysis of cellular DNA content, one MT was aneuploid, and eight NMT were diploid. Immunohistochemically, there was no difference between the MT and NMT. CONCLUSIONS:These results support the assumption that venous invasion, nuclear grade, and prominent necrobiotic nests are useful as histologic parameters to detect the malignant potential of PCT.

journal_name

Cancer

journal_title

Cancer

authors

Nishihara K,Nagoshi M,Tsuneyoshi M,Yamaguchi K,Hayashi I

doi

10.1002/1097-0142(19930101)71:1<82::aid-cncr282071

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

82-92

issue

1

eissn

0008-543X

issn

1097-0142

journal_volume

71

pub_type

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