OBJECT: @entity4236 ( @entity4236 ) is a rare @entity5 arising from the olfactory epithelium and found in the upper nasal cavity. The authors studied the frequency with which @entity4236 is misdiagnosed with other @entity5 of the paranasal sinuses such as @entity3270 ( @entity3270 ), @entity977 , @entity320 , @entity706 , and @entity24203 ( @entity24203 ). Based on the belief that misdiagnosis commonly occurs, they emphasized the importance of establishing the correct diagnosis, because the treatment regimens and prognosis of these @entity5 types are often significantly different. METHODS: Twelve consecutive @entity1 in whom @entity4236 was diagnosed were referred to the Department of Neurosurgery at the M. D. Anderson @entity5 Center between January 1998 and March 2000. Demographic data were collected, physical findings and mode of treatments were documented, and neuroimaging studies were assessed. Pathologists at the authors' institute reviewed the histological specimens. Only in two of 12 @entity1 was the diagnosis of @entity4236 confirmed. Lesions in 10 @entity1 were misdiagnosed; there were two cases of @entity320 , three cases of @entity3270 , three cases of @entity977 , and two cases of @entity24203 . Eight of 10 @entity1 in whom lesions were misdiagnosed required significant alteration in the initially proposed treatment plan. CONCLUSIONS: Neurosurgeons should be acutely aware of the variety of @entity5 that occur in the paranasal region. The correct diagnosis should be ensured before initiating treatment to provide the optimum therapy and spare the @entity1 from needless and potentially toxic treatment.

Misdiagnosis of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity706 :: ('MESH:D008223', 'Disease') :: ['lymphoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'neoplasms', 'neoplasm', 'tumors', 'Cancer'] @entity4236 :: ('MESH:D018304', 'Disease') :: ['ON', 'Olfactory neuroblastoma'] @entity3270 :: ('MESH:D018278', 'Disease') :: ['NEC', 'neuroendocrine carcinoma'] @entity977 :: ('MESH:D010911', 'Disease') :: ['pituitary adenoma'] @entity24203 :: ('MESH:C537344', 'Disease') :: ['sinonasal undifferentiated carcinoma', 'SNUC'] @entity320 :: ('MESH:D008545', 'Disease') :: ['melanoma']
@entity4236 :: (MESH:D018304,Disease) :: ['olfactory neuroblastoma']
