Abstract
Background: Metastasis to the pituitary is very rare. Thyroid carcinoma as a primary source of pituitary metastasis is uncommon. Pituitary metastasis is common in posterior pituitary. Metastasis can also occur to anterior pituitary with varied presentations. Case Description: A 47-year-old lady presented with galactorrhoea, ptosis, diminished vision of the right eye, and headache from 6 months. She had a pituitary macroadenoma with suprasellar, para-sellar and infrasellar extension on evaluation. She underwent initial transnasal transsphenoidal decompression followed by pteronial craniotomy with decompression of the residual tumour. The histopathology was metastatic tumor of sella. Further evaluation showed a thyroid nodule and bilateral lung nodules. With suspicion of a primary thyroid malignancy, total thyroidectomy was performed and biopsy report of the thyroid showed follicular carcinoma. Conclusion: Metastasis to the pituitary can be a rare presentation of thyroid cancer. It may masquerade a pituitary adenoma. Key-words: Sella, Pituitary metastases, Parasellar, Suprasellar, Diabetes Insipidus, Thyroid.
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