title: Unexpected Tumor: Primary Asymptomatic Schwannoma in Thyroid Gland.
abstract: The discovery of a tumor as a primary schwannoma in the thyroid gland is rare (Andrion et al. in Virchows Arch 413:367-372, 1988). It represents less than 1 % of mesenchymal neoplasms of this gland. Therefore, few cases of this type are described in medical literature (Aron et al. in Cytopathology 16:206-209, 2005; Cashman et al. in Medscape J Med 10(8):201, 2008; Coleman et al. in AJR Am J Roentgenol 140:383-7, 1983). In this article, we introduce the clinical case of a 27-year-old female patient, who presented a nodular mass located in the neck region. This mass was not associated with other symptoms and during the imagistic investigation it appeared to be a thyroglossal duct cyst. A fine needle aspiration biopsy was performed which revealed benign mesenchymal cells. After a pathology study of the piece resected through a thyroidectomy, it was confirmed that the tumor had neural characteristics, the final diagnosis being a primary schwannoma. The importance of a cytology study is emphasized, since in this case, it made it possible to accurately diagnose a mesenchymal tumor, despite their low frequency. It constitutes a highly useful tool for diagnosing non-epithelial neoplasia of the thyroid gland.
authors.affiliation: Department of Pathology, Hospital Universitario 12 de Octubre, Avda. de Córdoba s/n, 28041, Madrid, Spain. greissyv@hotmail.com.
authors.forename: G
authors.initials: G
authors.lastname: Vázquez-Benítez
authors.affiliation: Department of Pathology, Hospital Universitario 12 de Octubre, Avda. de Córdoba s/n, 28041, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Pérez-Campos
authors.affiliation: Department of Pathology, Hospital Universitario 12 de Octubre, Avda. de Córdoba s/n, 28041, Madrid, Spain.
authors.forename: N Alberti
authors.initials: NA
authors.lastname: Masgrau
authors.affiliation: Department of Pathology, Hospital Universitario 12 de Octubre, Avda. de Córdoba s/n, 28041, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Pérez-Barrios
mesh_terms: D000328:Adult; D044963:Biopsy, Fine-Needle; D005260:Female; D006801:Humans; D009442:Neurilemmoma / Q000473:pathology* / Q000601:surgery; D013964:Thyroid Neoplasms / Q000473:pathology* / Q000601:surgery; D013965:Thyroidectomy
keywords: Fine needle aspiration; Mesenchymal neoplasm; Schwannoma; Thyroid