Abstract
Glomus tumor is usually a small, benign tumor and typically occurs in the dermis or subcutis or soft tissues of the extremities and rarely in the visceral locations. Its bronchopulmonary origin is exceedingly rare clinical condition. The current case reported a 51-year-old male with dyspnea on exertion and obstructive pneumonia; he had a glomus tumor which has large size, deep location and exhibits an infiltrative margin as well as atypical mitotic figures. These characteristic suggests malignant behavior. Therefore diagnosis of glomus tumor of uncertain malignant potential was favored. Recently, the histopathological diagnostic criteria for malignant glomus tumors were defined in the WHO classification of soft tissue and bone tumors 4th edition. Here we also reviewed the literature on primary bronchopulmonary glomus tumors with special attention to the current concept of malignancy grade estimation.
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