ECE2021 Eposter Presentations Thyroid (43 abstracts)
Hedi Chaker Hospital, Department of Endocrinology, Sfax, Tunisia
Intoduction
The link between hyperthyroidism and breast cancer has been the subject of much controversy and literature in the past. It poses a daily clinical problem of information and senological follow-up of thyroid patients. We report our patients case.
Observation
A 46-year-old female patient who presented a Graves disease diagnosed 10 years ago. She had a moderate vascular goiter and no ocular signs. She presented firstly a severe hyperthyroidism: an elevated FT4 = 82.5 pmol/l (NR = 1121) and a suppressed TSH = 0.001 UI/l (NR = 044). Thyrotropin receptor antibodies (anti-rTSH) were strongly positive at 23.6 IU/l (NR < 2). The patient was treated with Benzylthiouracil for 3 years followed by voluntary interruption of treatment. The patient was later lost to follow-up. Four years later, she had a suspicious nodule in her left breast. The diagnosis of Invasive ductal carcinoma was confirmed. Tumor extension was negative. The procedure was a tumorectomy and lymph node dissection followed by adjuvant radiochemotherapy. The patient then received an antiestrogen for 5 years. The senological evolution was favourable.
Conclusion
Women with hyperthyroidism may be at increased risk of breast cancer. This suggests that in the case of hyperthyroidism, special attention may also need to be paid to breast cancer screening.