title: Primary Ewing's Sarcoma/Primitive Neuroectodermal Tumor of of Kidney - a Diagnostic Dilemma.
abstract: Among the group of small round cell tumors of kidney Ewing's sarcoma/PNET is a very rare entity which has aggressive clinical course. We report a case of renal mass in 24 years old male which was histologically diagnosed as small round cell tumor of kidney. Arrangement of the malignant cell along with vascular network in a filigree pattern was suspicious for a diagnosis of Ewing's sarcoma/PNET which was confirmed by positivity of CD 99 immunohistochemically. Thus careful histological observation and immunohistochemical stains can give the proper diagnosis of primary Ewing's sarcoma/PNET thus removing the diagnostic dilemma in the group of small round cell tumors.
authors.affiliation: Department of Pathology, Burdwan Medical College, Burdwan, West Bengal, India.
authors.forename: Nirmalya
authors.initials: N
authors.lastname: Chakrabarti
authors.affiliation: Department of Pathology, Burdwan Medical College, Burdwan, West Bengal, India.
authors.forename: Nikhilesh
authors.initials: N
authors.lastname: Dewasi
authors.affiliation: Department of Pathology, Burdwan Medical College, Burdwan, West Bengal, India.
authors.forename: Snehasish
authors.initials: S
authors.lastname: Das
authors.affiliation: Department of Pathology, Burdwan Medical College, Burdwan, West Bengal, India.
authors.forename: Arghya
authors.initials: A
authors.lastname: Bandyopadhyay
authors.affiliation: Department of Pathology, Bankura Sammilani Medical College, Bankura, West Bengal, India.
authors.forename: Nandini
authors.initials: N
authors.lastname: Bhaduri
keywords: diagnostic dilemma; ewing's sarcoma; renal