TY - GEN ID - cogprints7261 UR - http://cogprints.org/7261/ A1 - MN, Vidya A1 - Shivakumar, Swarna A1 - Biswas, Siddhartha A1 - S, Vijay Shankar Y1 - 2011/01/20/ N2 - Olfactory neuroblastoma is an uncommon malignant tumor of sinonasal tract arising from the olfactory neuro epithelium. The olfactory neuroblastomas presenting with divergent histomorphologies like, epithelial appearance of cells, lacking a neuro fibrillary background and absence of rosettes are difficult to diagnose. Such cases require immunohistochemistry to establish the diagnosis. We describe the clinical features, pathological and immunohistochemical findings of grade IV Olfactory neuroblastoma in a 57 year old man PB - BS Kakkilaya KW - Olfactory neuroblastoma; Nasal cavity; Immunohistochemistry TI - Olfactory Neuroblastoma: Diagnostic Difficulty AV - public ER -