title: Fine-needle aspiration of renal angiomyolipoma: a report of four cases.
abstract: OBJECTIVE
  Renal angiomyolipoma is an uncommon benign tumour composed of smooth muscle cells, blood vessels and adipose tissue. The cytological findings of this tumour are described.
  
  
  METHODS
  A retrospective analysis of four cases of angiomyolipoma diagnosed on fine-needle aspiration cytology (FNAC) during the period 1998-2004 was carried out. All the aspirations were carried out under ultrasonographic image guidance.
  
  
  RESULTS
  Smears from three cases showed oval- to spindle-shaped tumour cells, cohesive stromal fragments embedded in adipose tissue and branching blood vessels in a haemorrhagic background. No mitotic figures were seen. Smears from one case showed adipose tissue and blood. In this case, sections from the cell block showed mature adipose tissue and small blood vessels.
  
  
  CONCLUSIONS
  The diagnosis of angiomyolipoma can be made by FNAC under image guidance and a cell block may be quite helpful in making a correct diagnosis. It is important to establish a correct preoperative diagnosis as treatment of these tumours is conservative and this obviates the need for total nephrectomy.
authors.affiliation: Department of Pathology, Government Medical College & Hospital, Sector 32A, Chandigarh, India.
authors.forename: U
authors.initials: U
authors.lastname: Handa
authors.forename: A
authors.initials: A
authors.lastname: Nanda
authors.forename: H
authors.initials: H
authors.lastname: Mohan
mesh_terms: D000273:Adipose Tissue / Q000473:pathology; D000368:Aged; D018207:Angiomyolipoma / Q000175:diagnosis / Q000473:pathology*; D044963:Biopsy, Fine-Needle; D001808:Blood Vessels / Q000473:pathology; D005260:Female; D006801:Humans; D007668:Kidney / Q000473:pathology*; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology*; D008875:Middle Aged; D032389:Myocytes, Smooth Muscle / Q000473:pathology