Multicystic nephroma: a case report.
BACKGROUND
Cystic nephroma is an uncommon pediatric renal neoplasm. It needs to be differentiated from cystic partially differentiated nephroblastoma and from other renal neoplasms showing extensive cystic change. It is scantily reported in the cytology literature.


METHODS
A 7-month-old female with a left-sided abdominal lump was diagnosed as having cystic Wilms' tumor on computed tomography. Fine needle aspiration cytology showed cellular smears composed of monomorphic, round to oval cells, suggestive of a small round cell tumor, possibly rhabdomyosarcoma. However, histopathologic examination showed it to be a multicystic nephroma. On review of the cytologic smears, the blastemal component was absent.


CONCLUSIONS
This case highlights 1 extreme and unexpected cytologic appearance of cystic nephroma; it may result in misdiagnosis.
Gupta
Ruchika
R
Department of Pathology, Maulana Azad Medical College, New Delhi, India.
Dhingra
Kajal
K
Singh
Sompal
S
Nigam
Sonu
S
Jain
Shyama
S
D044963:Biopsy, Fine-Needle; D002467:Cell Nucleus / Q000473:pathology; D003560:Cysts / Q000473:pathology; D005260:Female; D006801:Humans; D007223:Infant; D007680:Kidney Neoplasms / Q000473:pathology*