Nontuberculous mycobacteria-associated spindle cell pseudotumor of the nasal cavity: a case report.

Abstract excerpt

Mycobacterial spindle cell pseudotumor (MSP) is a rare mass-forming lesion caused by mycobacterial infection, mostly in immunocompromised patients. Since it is composed of a proliferation of spindle-shaped fibrohistiocytic cells without forming epithelioid cell granulomas, histological distinction from other spindle cell lesions is often difficult and its pathophysiology is poorly understood. MSP arising in the...

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