title: Vascular proliferation of the thyroid. A complication of fine-needle aspiration.
abstract: Fine-needle aspiration (FNA) of the thyroid has a low morbidity rate, with hematoma formation being the most commonly encountered complication. We describe two cases of exuberant vascular proliferation within the thyroid gland, one resembling a cavernous hemangioma and the other with similar changes but with areas of papillary endothelial hyperplasia. Both lesions occurred in patients with a recent history of FNA prior to the thyroidectomy procedure. The vascular proliferation was interpreted as organizational changes in a hematoma secondary to the FNA. These cases, in conjunction with a recent case of Masson's vegetant intravascular hemangioendothelioma complicating thyroid FNA, expand the literature on vascular proliferations that may develop subsequent to thyroid FNA.
authors.affiliation: Department of Pathology, Foothills Hospital, Alberta.
authors.forename: K
authors.initials: K
authors.lastname: Tsang
authors.forename: M A
authors.initials: MA
authors.lastname: Duggan
mesh_terms: D001707:Biopsy, Needle / Q000009:adverse effects*; D001808:Blood Vessels / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013961:Thyroid Gland / Q000098:blood supply* / Q000473:pathology; D014652:Vascular Diseases / Q000209:etiology* / Q000473:pathology