Follicular thyroid cancer presenting initially with soft tissue metastasis

Area of Science:

• Oncology
• Endocrinology

Background:

• Follicular thyroid carcinoma (FTC) typically presents as a localized thyroid malignancy.
• Distant metastasis at initial diagnosis is uncommon for FTC.

Observation:

• A 58-year-old woman presented with an asymptomatic soft tissue mass, later diagnosed as metastatic FTC.
• Initial evaluation revealed a thyroid nodule consistent with follicular neoplasm.
• The patient initially refused treatment, leading to disease progression.

Findings:

• The patient developed extensive, sarcoma-like soft tissue masses over 2.5 years.
• Elevated serum thyroglobulin levels (3500 ng/ml) indicated advanced disease.
• Chemotherapy with epirubicin and cyclophosphamide resulted in stable disease.

Implications:

• This case underscores the importance of considering rare metastatic presentations of FTC.
• Delayed treatment can lead to significant disease progression and widespread metastasis.
• Chemotherapy may be a viable option for managing advanced, metastatic FTC.