Primary hypothyroidism presenting as a pituitary mass |
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Authors: | Nicholas W C Russell W F |
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Affiliation: | Department of Medicine, University of Mississippi Medical Center, Jackson 39216-4505, USA. |
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Abstract: | Pituitary enlargement secondary to primary hypothyroidism is a known but uncommon occurrence, which can be difficult to distinguish on computerized tomography (CT) and magnetic resonance imaging (MRI) from primary pituitary tumors. We describe a 33 year old female who was referred to a neurosurgeon for removal of a pituitary mass. The markedly elevated thyrotrophin stimulating hormone (TSH), absence of clinical features of hyperthyroidism, and low thyroid hormone values led to a diagnosis of pituitary enlargement secondary to primary hypothyroidism. The pituitary gland returned to normal size with thyroxine replacement therapy. Surgery was not indicated. |
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