Abstract
ObjectivesNeurilemmomas are benign tumors deriving from Schwann cells of the nerve sheath. They occur in all parts of the body. The highest incidence of neurilemmoma is in the head and neck region (38–45%), but involvement of the nose and paranasal sinus is quite rare, with only sporadic cases having been reported in the world literature. Fewer than 4% of these tumors involve the nasal cavity and paranasal sinuses. We describe the clinical, pathologic, and computed tomography (CT) features of five nasal neurilemmomas.MethodologyCT features of five patients with nasal schwannoma proved by operation and pathology were investigated.ResultsSchwannomas tend to be solitary and are usually well-circumscribed tumors with an oval, round or fusiform shape in the unilateral nasal cavity. The lesions usually have a mottled central lucency with peripheral intensification on contrast-enhanced CT scans. The heterogeneous appearance is related to areas of increased vascularity with adjacent non-enhancing cystic or necrotic regions.ConclusionsSchwannoma should be considered in the differential of unusual nasal masses. Certain clinical and CT patterns may be of use in the differential diagnosis.
Highlights
Neurilemmomas are benign tumors deriving from Schwann cells of the nerve sheath
Certain clinical and computed tomography (CT) patterns may be of use in the differential diagnosis
The highest incidence of neurilemmoma is in the head and neck region (38–45%) [1,2], but involvement of the nose and paranasal sinus is quite rare, with only sporadic cases having been reported in the world literature
Summary
Neurilemmomas are benign tumors deriving from Schwann cells of the nerve sheath. They occur in all parts of the body. The highest incidence of neurilemmoma is in the head and neck region (38–45%) [1,2], but involvement of the nose and paranasal sinus is quite rare, with only sporadic cases having been reported in the world literature. Fewer than 4% of these tumors involve the nasal cavity and paranasal sinuses [3]. The clinical symptomatology of nasal neurilemmomas is varied and nonspecific. The signs and symptoms usually depend upon the location or size of the tumor and subsequent involvement of surrounding structures. CT reveals a unilateral nasal mass that may be expansile [6].
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