title: Elastosonographic evaluation of thyroid nodules in acromegaly.
abstract: OBJECTIVE
  Ultrasound-elastography (US-E) appears to be a helpful tool for the diagnosis of thyroid cancer. In acromegaly, the prevalence of thyroid cancer is still debated. The aims of this study were to evaluate thyroid nodules in acromegaly and to establish the accuracy of US-E in providing information on their nature, using cytological analysis as a reference.
  
  
  METHODS
  US-E was applied to 90 nodules detected in 25 acromegalic patients and to 94 nodules found in 31 non-acromegalic goitrous subjects. The lesions were classified according to the elasticity scores (ES) as soft (ES 1-2) or hard (ES 3-4). Fine needle aspiration cytology could be performed in 60.8% of hard nodules in acromegalics and in 86.7% of hard nodules in controls.
  
  
  RESULTS
  The prevalence of hard nodules was significantly higher in the whole group of acromegalic patients than in controls (56.8 vs 16.0%, P<0.0001). The prevalence of hard nodules in patients with active acromegaly (68.9%) was greater, though not to a statistically significant extent, than that observed in cured (44.4%) and controlled (52.5%) patients. Cytology revealed malignancy or suspect malignancy in four of the nodules of non-acromegalic subjects and in none of the nodules of acromegalic patients.
  
  
  CONCLUSIONS
  This study has demonstrated a high prevalence of stiff thyroid nodules in acromegaly, greater than that found in non-acromegalic goitrous subjects. In acromegalics, hard nodules appeared not to be malignant on cytopathological examination and are probably of fibrous nature. Thus, US-E appears to be of limited value for the diagnosis of thyroid cancer in acromegaly.
authors: Istituto Auxologico Italiano, University of Milan, Ospedale San Luca IRCCS, Via Spagnoletto 3, 20149 Milan, Italy.
authors: Massimo
authors: M
authors: Scacchi
authors: Massimiliano
authors: M
authors: Andrioli
authors: Chiara
authors: C
authors: Carzaniga
authors: Giovanni
authors: G
authors: Vitale
authors: Mirella
authors: M
authors: Moro
authors: Luca
authors: L
authors: Poggi
authors: Francesca
authors: F
authors: Pecori Giraldi
authors: Letizia M
authors: LM
authors: Fatti
authors: Francesco
authors: F
authors: Cavagnini
mesh_terms: D000172:Acromegaly / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000473:pathology; D000236:Adenoma / Q000150:complications / Q000473:pathology; D000368:Aged; D044963:Biopsy, Fine-Needle; D054459:Elasticity Imaging Techniques / Q000379:methods*; D005260:Female; D006042:Goiter / Q000473:pathology; D019382:Human Growth Hormone / Q000097:blood; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000032:analysis / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010911:Pituitary Neoplasms / Q000150:complications / Q000473:pathology; D015203:Reproducibility of Results; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging; D016606:Thyroid Nodule / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000473:pathology
chemical_list: D019382:Human Growth Hormone; D007334:Insulin-Like Growth Factor I