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  • Title: Lymphocytic hypophysitis with central diabetes insipidus and consequent panhypopituitarism preceding a multifocal, intracranial germinoma in a prepubertal girl.
    Author: Bettendorf M, Fehn M, Grulich-Henn J, Selle B, Darge K, Lüdecke DK, Heinrich UE, Saeger W.
    Journal: Eur J Pediatr; 1999 Apr; 158(4):288-92. PubMed ID: 10206125.
    Abstract:
    UNLABELLED: We report the clinical course of a prepubertal girl with central diabetes insipidus (DI) and consequent panhypopituitarism evolving over a period of 10 years due to lymphocytic hypophysitis and subsequent germinoma. Two years after the diagnosis of central DI was established, MRI revealed a thickened pituitary stalk. Later pituitary enlargement and increasing thickening of the pituitary stalk impinging on the optic chiasm required a trans-sphenoidal biopsy which disclosed active hypophysitis with lymphocytic infiltrates and necrosis. High dose dexamethasone treatment only temporarily halted the disease process. Therefore, stereotactic radiation therapy was performed as a rescue treatment and MRI findings almost reversed. However, the subsequent MRI showed multiple intracranial lesions identified histologically as a germinoma and a standard chemotherapy and radiation was performed. CONCLUSION: The diagnosis of diabetes insipidus in children requires long-term follow up beyond the pubertal age in order to establish the underlying cause. In contrast to lymphocytic hypophysitis in adults, lymphocytic hypophysitis in prepubertal children may represent the first sign of a host reaction to an occult germinoma.
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