MR imaging of the posterior hypophysis in children
| Autor: | R Rappaport, R Brauner, V Taviere, D. Lallemand, M. O. Barth, F. Gudinchet, Francis Brunelle |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Pituitary gland
Adolescent endocrine system diseases Pituitary Gland Posterior Diabetes Mellitus medicine Humans Pituitary Neoplasms Sella Turcica Radiology Nuclear Medicine and imaging Child Pituitary stalk business.industry Infant Articles General Medicine Anatomy medicine.disease Magnetic Resonance Imaging Mr imaging Lobe medicine.anatomical_structure Sella turcica Child Preschool Diabetes insipidus business |
| Zdroj: | AJNR Am J Neuroradiol |
| ISSN: | 1546-3141 0361-803X |
| DOI: | 10.2214/ajr.153.2.351 |
| Popis: | The posterior lobe of the pituitary gland was studied by MR imaging in 30 children without pituitary gland disease and compared with studies from a group of 13 children with central diabetes insipidus, including eight cases of primary diabetes insipidus and five cases of diabetes insipidus secondary to suprasellar tumors (four proved germinomas, one still unknown tumor). Two components in the sella turcica were identified in all 30 children without pituitary gland disease, and the posterior lobe was identified as a high-intensity structure on T1-weighted images. In all 13 patients with diabetes insipidus, the normal hyperintense signal of the posterior hypophysis was absent on T1-weighted images. Three patients with suprasellar tumors presented with a progressively enlarging pituitary stalk on follow-up. Our findings show that absence of the normal hyperintense signal of the posterior lobe is closely related to a loss of function of the neurohypophysis. Size or signal modification of the pituitary stalk should suggest the development of a suprasellar tumor. |
| Databáze: | OpenAIRE |
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