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Pleomorphic adenoma of the parotid gland: Histopathologic analysis of the capsular characteristics of 218 tumors
Author(s) -
Zbären Peter,
Stauffer Edouard
Publication year - 2007
Publication title -
head and neck
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.012
H-Index - 127
eISSN - 1097-0347
pISSN - 1043-3074
DOI - 10.1002/hed.20569
Subject(s) - pleomorphic adenoma , capsule , pseudopodia , pathology , stroma , parotid gland , medicine , salivary gland , anatomy , biology , immunohistochemistry , cell , botany , genetics
Background. Histopathologic features of the capsule may have an impact on the recurrence rate of pleomorphic adenomas. Methods. Retrospective ( n = 154) and prospective ( n = 64) histologic analysis of the capsular characteristics such as incompleteness, tumor penetration, pseudopodia, and satellite tumors of 218 pleomorphic adenomas. Results. In 160 of the 218 (73%) pleomorphic adenomas, 1 or more capsular characteristics such as incomplete capsule (33%), capsule penetration (26%), pseudopodia (40%), and satellite nodules (13%) were detected. Incomplete capsule and satellite tumors were most frequently seen in the stroma‐rich (myxoid) subtype. Capsular penetration and pseudopodia were significantly more common in the prospective group than in the retrospective group ( p < .05/<.05). Conclusion. Pseudopodia and satellite tumors were more common than reported in the literature. If left in the surrounding salivary gland tissue at surgery, they can lead to recurrences of pleomorphic adenomas of the parotid gland. © 2007 Wiley Periodicals, Inc. Head Neck, 2007