Pituitary tumors producing thyrotropin are very rare. We report a case of a 38-year-old, male admitted for seizure, preceded by 1 week history of generalized weakness, fatigue, anorexia, nausea and vomiting, with a 5 year history of recurrent headache followed by blurring of vision, who was found to have persistently elevated serum free thyroid hormones and non-suppressed thyroid stimulating hormone (TSH) levels, with tumor residual after craniotomy with excision of the pituitary macroadenoma. To our knowledge, this is the first reported case of TSH-producing adenoma in the Philippines.

Male ; Adenoma ; Anorexia ; Craniotomy ; Headache ; Nausea ; Philippines ; Pituitary Neoplasms ; Seizures ; Thyroid Hormones ; Thyrotropin ; Vomiting

Thyroid incidentalomas detected by 18F-Fluorodeoxyglucose Positron Emission Tomography (FDG-PET) have been reported in 1.1 to 2.9% of scans performed. Previous studies have determined the prevalence of thyroid malignancy in these patients to be 14-72%.

Thyroid Incidentaloma ; Thyroid Carcinoma