Pituitary hyperplasia secondary to acquired hypothyroidism: case report

Objective and Importance: despite recent progress in imaging, it is still difficult to distinguish between pituitary adenoma and hyperplasia, even using Magnetic Resonance Imaging (MRI) with gadolinium injection. We describe an example of reactive pituitary hyperplasia from primary hypothyroidism that mimicked a pituitary macroadenoma in a child.Clinical Presentation: a 10 year old boy presented with headache and statural growth arrest.

MRI revealed an intrasellar and suprasellar pituitary mass. Endocrine evaluation revealed primary hypothyroidism.Intervention: the patient was started on levothyroxine with resolution of the mass effect.

Conclusion: primary hypothyroidism should be considered in the differential diagnosis of solid mass lesions of the pituitary gland. Examination of thyroid function in patients with sellar and suprasellar masses revealed by MRI may avoid unnecessary operations which can cause irreversible complications.

Author: Roberto FranceschiUmberto RozzanigoRiccarda FailoMaria BellizziAnnunziata Di Palma
Credits/Source: Italian Journal of Pediatrics 2011, 37:15

Published on: 2011-04-07

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