Diagnostic Challenge in Cytology: Fibrosing Thyroiditis Mimicking Medullary Thyroid Carcinoma
Year: 2026
Type: article
Study design: Case Report
Abstract: HistoryRiedel's disease is rare, representing just 0.05% of surgical thyroid conditions.It occurs more frequently in females and is considered part of the spectrum of IgG4-related systemic diseases.It may present as a firm mass in the thyroid, with intraoperative diagnostic confusion with anaplastic thyroid cancer, thyroid sarcoma, thyroid lymphoma, or fibrosing Hashimoto's thyroiditis been reported.[1,2] Fine-needle aspiration cytology (FNAC) revealed inflammatory cells and spindle-shaped myofibroblasts, leading to a misdiagnosis of medullary thyroid carcinoma.[1] We report the case of a 40-year-old woman presenting with thyroid swelling and a thyroid imaging reporting and data system (TIRADS) V lesion.
Source: Journal of Cytology
Authors: G. Anju, Meenakshi Rao, Nivedita Sharma
Institution: All India Institute of Medical Sciences Jodhpur
Language: English
Subfield: Endocrinology, Diabetes and Metabolism
Field: Medicine
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W7214339930