title: Benign nodule shrinkage: a diagnosis not to be missed.
abstract: BACKGROUND
  Thyroid nodules presenting ultrasonographic (US) findings suspicious for malignancy should undergo fine-needle aspiration and further cytologic analysis according to the Bethesda 2010 classification. Benign necrotic thyroid nodules may also harbor suspicious US features as follows: ill-defined margins, taller than wide aspect, strong hypoechogenicity, high stiffness index on elastography examination, and reported worrisome cytologic or histologic alterations.
  
  
  RESULTS
  We report the case of a benign thyroid nodule showing shrinkage over time and harboring malignant US features. Fine-needle aspiration cytology examination showed necrosis and no malignant cells.
  
  
  CONCLUSIONS
  Precise Doppler US analysis of the nodule and its evolution over time may limit the risk of false-positive diagnosis of thyroid malignancy.
authors.affiliation: Medical imaging center, Aurillac - France.
authors.forename: Alexis
authors.initials: A
authors.lastname: Lacout
authors.affiliation: Histopathological center, Aurillac - France.
authors.forename: Carole
authors.initials: C
authors.lastname: Chevenet
authors.affiliation: Radiodiagnostics & oncology imaging department, Polyclinique les fleurs, Ollioules - France.
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Marcy
mesh_terms: D044963:Biopsy, Fine-Needle; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D016606:Thyroid Nodule / Q000175:diagnosis*; D014463:Ultrasonography