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Solitary fibrous tumor with atypical histological features occurring in the palatine tonsil: an uncommon neoplasm in an uncommon site
Author(s) -
Macarenco Ricardo Silvestre,
Bacchi Carlos E.,
Domingues Maria Aparecida Custódio
Publication year - 2006
Publication title -
journal of oral pathology and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 83
eISSN - 1600-0714
pISSN - 0904-2512
DOI - 10.1111/j.1600-0714.2006.00460.x
Subject(s) - solitary fibrous tumor , desmin , cd34 , pathology , palatine tonsil , tonsil , immunohistochemistry , medicine , anatomy , head and neck , biology , vimentin , genetics , surgery , stem cell
Solitary fibrous tumor (SFT) is an uncommon mesenchymal neoplasm that usually arises in the pleura. Although this tumor has been described in other sites, including the head and neck area, in the oropharynx it is extremely rare. We report the first case of a SFT arising from the palatine tonsil of a 62‐year‐old man. The tumor consisted of spindle‐shaped cells distributed in a haphazard pattern and presented atypical histological features such as hypercellular areas and high mitotic count. Immunohistochemical studies showed strong positivity for CD34 and bcl‐2, and weak positivity for desmin. Smooth muscle actin, S‐100 protein and cytokeratines were negative. The patient was well without disease 1 year after surgery.