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Case Reports
. 2023 Jan 18:13:1108133.
doi: 10.3389/fonc.2023.1108133. eCollection 2023.

Adult-type rhabdomyoma of the thyroid: A case report

ZhenPeng Jiang  1 , MengNi Zhang  2 , JiaYan Huang  1 , Ling Song  1 , Qiang Lu  1
Affiliations
Case Reports

Adult-type rhabdomyoma of the thyroid: A case report

ZhenPeng Jiang et al. Front Oncol. .

Abstract

Adult-type rhabdomyoma (AR) is a benign myogenous neoplasm. It is rarely located in the thyroid. We present a case of a 61-year-old man, presenting with complaints of a mass found in his left neck for three years. Ultrasonography and computed tomography showed a mass in the left lobe of the thyroid. Subsequently, a fine-needle aspiration biopsy showed that the lesion was suspected to be an oncocytic neoplasm, and the patient underwent surgery. Finally, the lesion was confirmed to be an AR of the thyroid by postoperative pathological diagnosis. In conclusion, AR that occurs in the thyroid is remarkably rare. No case reports to date have described in detail the imaging findings of AR in the thyroid. This study demonstrates the imaging characteristics of a patient with AR of the thyroid, in order to provide more extensive insights to consider the differential diagnosis of thyroid lesions.

Keywords: rhabdomyoma; adult-type; case; thyroid; ultrasound.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Ultrasonography images of adult-type rhabdomyoma of the thyroid. (A) Conventional gray-scale sonography revealed a solid and hypoechoic thyroid nodule (arrow) in the left lobe. (B) Color Doppler flow imaging showed a relatively rich blood flow signal inside this nodule (arrow). (C) Contrast-enhanced ultrasound image showed hypoenhancement of the nodule (arrow) in the arterial phase. (D) Shear wave elastography showed a lower stiffness of the nodule (arrow) compared with that of the thyroid.
Figure 2
Figure 2
CT images of adult-type rhabdomyoma of the thyroid. Plain CT images revealed the left thyroid lobe was obviously enlarged, and there was a lesion (arrow) with slightly low density in the left thyroid lobe.
Figure 3
Figure 3
Pathological findings of adult-type rhabdomyoma of the thyroid. (A) Histopathological section (hematoxylin and eosin staining). (B) Immunohistochemistry result showing the expression of desmin. (C) Immunohistochemistry result showing the expression of MyoD1. (D) Immunohistochemistry result showing the expression of myogenin. (E) Immunohistochemistry result showing the expression of smooth muscle actin. (F) Immunohistochemistry result showing the expression of S-100 protein.
See this image and copyright information in PMC

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