Acute Sheehan Syndrome With Distinctive Arginine Vasopressin Secretion and Magnetic Resonance Imaging Findings.
In cases of acute Sheehan syndrome with persistent hyponatremia despite hydrocortisone treatment, consider evaluating for inappropriate AVP secretion dynamics.
Where it sits
this study against the rest of the ghrp-2 (pralmorelin) corpusSummary and findings
This case report examines a 30-year-old Japanese woman with acute Sheehan syndrome following massive postpartum hemorrhage, focusing on her arginine vasopressin (AVP) secretion dynamics and magnetic resonance imaging (MRI) findings. The patient experienced hyponatremia that did not improve with hydrocortisone therapy, and required temporary administration of oral 1-desamino-8-D-arginine vasopressin. This suggests a complex interplay between AVP secretion and blood flow to the posterior pituitary lobe.
Abstract
Acute Sheehan syndrome is a rare condition that occurs hours to days post partum and causes hypopituitarism. It may cause hyponatremia due to adrenal insufficiency, and most patients improve with steroid therapy. However, hyponatremia is caused not only by adrenal insufficiency but also by inappropriate secretion of arginine vasopressin (AVP). We report the case of a 30-year-old Japanese primipara with massive postpartum hemorrhage and acute Sheehan syndrome. Hyponatremia developed following hypernatremia soon after the postpartum period; however, it did not improve despite adequate hydrocortisone supplementation. AVP fluctuated based on water balance and magnetic resonance imaging findings, showing distinctive AVP secretion dynamics. Oral 1-desamino-8-D-arginine vasopressin was temporarily needed during the clinical course, after which it was not needed, suggesting that impaired blood flow to the posterior pituitary lobe and its improvement may have contributed to the distinctive AVP secretion dynamics. Therefore, when hyponatremia is not improved despite adequate hydrocortisone supplementation in patients with acute Sheehan syndrome, the syndrome of inappropriate antidiuretic hormone secretion should be considered because distinctive AVP secretion dynamics can occur after severe ischemia of the pituitary gland.
Background
Sheehan syndrome is a rare condition resulting from severe blood loss during or after childbirth, leading to pituitary gland failure. Prior literature has documented hormonal deficiencies associated with this syndrome, but the specific patterns of arginine vasopressin secretion and MRI findings have not been thoroughly characterized. This study aims to fill that gap by examining these aspects in patients diagnosed with acute Sheehan syndrome.
Methods
Not reported in abstract.
Results
Not reported in abstract.
Interpretation
Not reported in abstract.
Key findings
- Not reported in abstract.
Limitations
- Not reported in abstract.