title: Fine needle aspiration cytology of fetal rhabdomyomatous and teratoid Wilms tumor.
abstract: OBJECTIVE
  To review nephrectomy specimens for pediatric renal tumors seen over a period of 9 years (1995-2003).
  
  
  METHODS
  Specimens categorized as fetal rhabdomyomatous Wilms tumors (WTs) or teratoid WTs were selected. Corresponding fine needle aspiration cytology slides were subjected to cytomorphologic analysis.
  
  
  RESULTS
  Of 93 specimens of WT, 3 cases of fetal rhabdomyomatous WT and 2 cases of teratoid WT were identified. The aspirates were stromal predominant, and all of them showed rhabdomyoblasts embedded within. These stained variably green or orange on Papanicolaou stain and blue-gray on May-Grünwald-Giemsa stain. In all 5 aspirates, foci of blastema with or without tubules were identified, permitting a diagnosis of WT. A squamous morule was seen in an aspirate from teratoid WT.
  
  
  CONCLUSIONS
  The outcome of fetal rhabdomyomatous and teratoid WTs is good, but the tumors do not shrink with chemotherapy. Identification of rhabdomyoblastic elements on aspirates can help in assessment of subsequent response to treatment.
authors: Department of Pathology, All India Institute of Medical Sciences, New Delhi, India.
authors: Anupma
authors: A
authors: Nayak
authors: Venkateswaran K
authors: VK
authors: Iyer
authors: Shipra
authors: S
authors: Agarwal
authors: Sandeep
authors: S
authors: Agarwala
mesh_terms: D044963:Biopsy, Fine-Needle; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007680:Kidney Neoplasms / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D009392:Nephrectomy; D012207:Rhabdomyoma / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D013724:Teratoma / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D016896:Treatment Outcome; D009396:Wilms Tumor / Q000151:congenital / Q000473:pathology* / Q000601:surgery