title: [Value of aspiration biopsy of subcutaneous fat in amyloidosis].
abstract: Fine-needle aspiration of subcutaneous fat (FNAF) was performed in 24 patients, 12 with previously diagnosed amyloidosis presenting with proteinuria or nephrotic syndrome, and 12 presenting a nephrotic syndrome without amyloidosis on renal biopsy. FNAF was positive in 10 of 12 patients with amyloidosis (sensitivity: 83%) and negative in 12 of 12 patients with non-amyloid nephrotic syndrome (specificity: 100%). Considering a 2.5 to 10% prevalence of amyloidosis in adult patients with proteinuria or nephrotic syndrome, a positive FNAF is diagnostic of amyloidosis, and a negative FNAF rules out the diagnosis with a probability of 98 to 99%. FNAF is a simple and safe method which can be useful in patients who cannot undergo a renal biopsy.
mesh_terms: D000273:Adipose Tissue / Q000473:pathology*; D000328:Adult; D000686:Amyloidosis / Q000150:complications / Q000473:pathology*; D001707:Biopsy, Needle; D006801:Humans; D008875:Middle Aged; D009404:Nephrotic Syndrome / Q000209:etiology; D011507:Proteinuria / Q000209:etiology
vernacular_title: Valeur de la ponction-aspiration de la graisse sous-cutanée dans le diagnostic de l'amylose.