Intrathoracic Benign Goiter Imaged by 18F-FDG-PET: A Case Report

A 55-year-old woman was referred for a suspicion of mediastinal tumor through plain X-ray photography (X-P). Magnetic resonance imaging (MRI) revealed a 3 cm diameter tumor which seemed to connect to the thyroid and projected into the mediastinum. A fine needle aspiration biopsy was tried but could...

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Bibliographic Details
Published in:Medicine (Baltimore) 2015-08, Vol.94 (32), p.e1387-e1387
Main Authors: Wakahara, Shigeyuki, Konoshita, Tadashi, Sakai, Ai, Nakaya, Takahiro, Ichikawa, Mai, Yamamoto, Katsushi, Imagawa, Michiko, Kimura, Hirohiko, Okazawa, Hidehiko, Ishizuka, Tamotsu
Format: Article
Language:English
Subjects:
Adenoma - diagnosis
Biopsy, Fine-Needle
Clinical Case Report
Diagnosis, Differential
Female
Fluorodeoxyglucose F18
Humans
Middle Aged
Positron-Emission Tomography - methods
Radiopharmaceuticals
Thyroid Neoplasms - diagnosis
X-Rays
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Summary:A 55-year-old woman was referred for a suspicion of mediastinal tumor through plain X-ray photography (X-P). Magnetic resonance imaging (MRI) revealed a 3 cm diameter tumor which seemed to connect to the thyroid and projected into the mediastinum. A fine needle aspiration biopsy was tried but could not reach a conclusive diagnosis. Thereby, fluorine-18-fluorodeoxyglucose positron emission tomography (F-FDG-PET) was performed and a high accumulation was revealed with standardized uptake value (SUV) of 3.8. Thus, the right lobe excision procedure was enforced. The obtained tumor was continuous to the right lobe as expected. Microscopically, the encapsulated tumor consisted of atypical large-sized follicles without malignant characteristics. Thus, histological diagnosis was follicular thyroid adenoma.Thus, follicular adenoma of thyroid could present negative iodine-123-radioisotope (I-RI) uptake and positive F-FDG-PET accumulation.
ISSN:0025-7974
1536-5964
DOI:10.1097/MD.0000000000001387