Gestational choriocarcinoma and thyrotoxicosis

Area of Science:

• Endocrinology
• Gynecologic Oncology
• Oncology

Background:

• Choriocarcinoma is a rare malignancy associated with hormonal imbalances.
• Thyrotoxicosis, a condition of excess thyroid hormones, can manifest in various ways.
• The co-occurrence of choriocarcinoma and thyrotoxicosis is infrequent, with only a few cases reported.

Purpose of the Study:

• To describe a case of metastatic choriocarcinoma presenting with thyrotoxicosis.
• To investigate the correlation between human chorionic gonadotropin (hCG) levels and thyroid function in a patient with choriocarcinoma.
• To explore the potential mechanisms linking choriocarcinoma and secondary thyrotoxicosis.

Main Methods:

• Case report of a 26-year-old woman.
• Serial monitoring of serum thyroxine (T4), thyroid stimulating hormone (TSH), and beta sub-unit human chorionic gonadotropin (hCG) levels.
• Clinical assessment of thyrotoxicosis symptoms and biochemical markers.

Main Results:

• The patient presented with metastatic choriocarcinoma and clinical/biochemical thyrotoxicosis.
• Serum T4 and TSH levels showed a precise correlation with beta-hCG levels and tumor burden.
• This case represents the eighth reported instance of choriocarcinoma associated with thyrotoxicosis.

Conclusions:

• The hypermetabolic syndrome in choriocarcinoma may stem from secondary thyrotoxicosis.
• Thyrotoxicosis could be induced by the TSH-like activity of hCG produced by the tumor.
• Alternatively, the tumor might concurrently produce molar thyrotropin, leading to thyrotoxicosis.