Journal
DIAGNOSTICS
Volume 10, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/diagnostics10020100
Keywords
papillary thyroid carcinoma; papillary microcarcinoma; muscle metastasis; solitary muscle metastasis; FDG PET/CT; F-18-fludeoxyglucose positron emission tomography computed tomography; thyroglobulin; TENIS syndrome
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Funding
- [PN-III-P1-1.2-PCCDI2017-0737]
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Papillary thyroid cancer (PTC) is the most common type of thyroid malignancy and is characterized by slow growth and an indolent biological behavior. Papillary thyroid microcarcinoma is the PTC with the maximum size of the tumor <1cm, considered the most indolent form of thyroid cancer. PTC is usually metastasizes in cervical lymph nodes, lungs and bones and, less commonly, in brain or liver. Skeletal muscle metastases from PTC are extremely rare, a retrospective review of the literature revealed only 13 case reports. Among them, six cases are solitary skeletal muscle metastases, and seven are multiple metastases, most of them being associated with lung lesions. It seems that PTC is prone to metastasizing to the erector spinae and thigh muscles groups with unique cases located in trapezoid, biceps, deltoid, gastrocnemius and rectus abdominis muscles. Although extremely rare, one must bear in mind the fact that muscle metastasis from PTC is possible, and that is the reason we would like to discuss the existing clinical cases and to add a unique case of solitary skeletal muscle metastasis from papillary microcarcinoma.
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