Although malignant fibrous histiocytoma is one of the most commonly encountered malignant soft tissue tumor, head and neck presentation is extremely rare. The aim of this article is to present the results of magnetic resonance imaging (MRI) of a case with sinonasal malignant fibrous histiocytoma. A 59 years old male patient was referred to a tertiary medical center with a mass in the midface, nasal obstruction, epistaxis and anosmia. In MRI assesment, the involvement of the nose, bilateral nasal cavities, anterior ethmoids, both frontal sinuses and right maxillary sinus was observed. The mass having decreased signal intensity in T1W images and increased signal intensity in T2W was also showing an apparent heterogenous contrast enhancement. In MRI sections, the invasion into the superior orbit and anterior cranial fossae was determined. Though it is rare, the malignant fibrous histiocytoma should be remembered in the differential diagnosis of sinonasal masses. MRI assesment is valuable in the detection of the involvement of the surrounding tissues.
Key Words: Malignant fibrous histiocytoma, Sinonasal, MRI
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