Related Experiment Video
Updated: May 13, 2026

Preparation of Mouse Pituitary Immunogen for the Induction of Experimental Autoimmune Hypophysitis
Published on: December 17, 2010
A case of IgG4-related hypophysitis without pituitary insufficiency
Yujiro Hattori1, Shigeyuki Tahara, Yudo Ishii
1Department of Neurosurgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan. yujiro@nms.ac.jp
Context:
IgG4-related hypophysitis is a novel clinical disease entity, which is typically complicated by hypopituitarism.
Objective:
The objective of the study was to describe a novel case of IgG4-related hypophysitis without pituitary insufficiency and summarize the current relevant literature.
Patient And Methods:
A 55-year-old Japanese man presented with an enlarged pituitary gland and bitemporal hemianopsia. Endocrine studies revealed normal pituitary function, although his serum IgG4 level was high. The patient underwent a transsphenoidal biopsy of the pituitary gland, and the pathological tissues were consistent with IgG4-related hypophysitis. Oral prednisolone therapy was started, and after 6 months, his serum IgG4 level decreased and visual field improved.
Conclusion:
We described the first case of IgG4-related hypophysitis without pituitary insufficiency. However, further case collection is needed to characterize the pathophysiology of IgG4-related hypophysitis.
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