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A clinicopathologic and immunohistochemical study of ten pancreatic lymphangiomas and a review of the literature
Author(s) -
Paal Edina,
Thompson Lester D.,
Heffess Clara S.
Publication year - 1998
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/(sici)1097-0142(19980601)82:11<2150::aid-cncr9>3.0.co;2-z
Subject(s) - medicine , pathology , cd31 , immunohistochemistry , pancreas , cd34 , serous fluid , biology , stem cell , genetics
BACKGROUND Pancreatic lymphangiomas are rare benign tumors, of which only a few cases have been reported in the literature. In this study, the authors present a series of primary pancreatic lymphangiomas. METHODS Cases of nonepithelial pancreatic cystic tumors (lymphangiomas) diagnosed between 1966 and 1994 were retrieved from the Endocrine Pathology Registry of the Armed Forces Institute of Pathology. Histologic features (in 10 cases) as well as histochemical and immunohistochemical studies (in 6 cases) were reviewed. Long term patient follow‐up data were obtained in 9 cases. RESULTS The patients included 8 females and 2 males ages 2‐61 years (mean age, 28.9 years) at initial presentation. The tumors were circumscribed and occurred predominantly (in 6 of 10 cases) in the tail of the pancreas. The multicystic, serous, or chylous fluid‐filled cystic tumors ranged from 3 to 20 cm (average, 12.7 cm) in greatest dimension. Histologically, the tumors consisted of multilocular cystic spaces of various sizes, lined by endothelial cells. The stroma contained smooth muscle and mature lymphocytes. Immunohistochemistry determined the endothelial lining cells to be factor VIII‐R antigen and CD31 positive (in all cases tested) but usually CD34 negative. All patients for whom follow‐up data were obtained (n = 9) were alive without evidence of disease an average of 7.2 years after initial diagnosis. CONCLUSIONS Pancreatic lymphangiomas occur predominantly in females within a wide age range. Multilocular, fluid‐filled cysts, with endothelial immunoreactivity for factor VIII‐R antigen and CD31, are characteristic of these tumors. Complete surgical excision of these benign tumors resulted in excellent long term prognoses for all patients studied. Cancer 1998;82:2150‐2158. © 1998 American Cancer Society.