title: Multilocular renal cyst: a diagnostic pitfall on fine-needle aspiration cytology: case report.
abstract: Benign renal lesions, apart from simple cysts, are rarely sampled by fine-needle aspiration biopsy (FNAB) and are potential diagnostic pitfalls. A complex renal mass in a 33-yr-old pregnant woman, presenting in the second trimester with haematuria, was aspirated twice, a week apart, under ultrasound guidance. The second FNAB yielded predominantly mesenchymal elements thought to represent an angiomyolipoma, but the mass was identified as a multilocular renal cyst (MLRC) on the nephrectomy specimen. Differential diagnoses of angiomyolipoma, MLRC, and renal cell carcinoma (RCC) are compared and discussed in relation to patient management.
authors.affiliation: Department of Cytology, Westmead Hospital, NSW, Australia.
authors.forename: C
authors.initials: C
authors.lastname: Morgan
authors.forename: M L
authors.initials: ML
authors.lastname: Greenberg
mesh_terms: D000328:Adult; D018207:Angiomyolipoma / Q000175:diagnosis; D001707:Biopsy, Needle; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis; D007690:Polycystic Kidney Diseases / Q000175:diagnosis / Q000473:pathology*; D011247:Pregnancy; D011252:Pregnancy Complications, Neoplastic / Q000175:diagnosis / Q000473:pathology*; D009396:Wilms Tumor / Q000175:diagnosis