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lethal midline granuloma

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lethal midline granuloma
n.
A destructive granulomatous lesion usually arising in the nose or paranasal sinuses and ending in death. Also called malignant granuloma.

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Because malignant lymphomas are associated with surface crusting, widespread necrosis, and inflammation, they were once considered to be inflammatory lesions, known as lethal midline granulomas or nonhealing granulomas.
Classification of nasal granulomas Infectious Mycobacterial: Tuberculosis (human, bovine, or avian); atypical tuberculo- sis; leprosy Bacterial: Rhinoscleroma Treponemal: Syphilis; yaws Fungal: Mucormycosis; aspergillosis; blastomycosis; histoplasmosis; coccidiomycosis; rhinosporidiosis Parasitic: Leishmaniasis Noninfectious Wegener's granulomatosis Sarcoidosis Inclusion granuloma (silicosis; berylliosis) Foreign-body retention Malignant Lethal midline granuloma Nonspecific
It is now recognized that the vast majority of cases of lethal midline granuloma represent nasal T-cell lymphomas.
 
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