Gestational Gigantomastia Complicated by PTHrP-Mediated Hypercalcemia

The Journal of Clinical Endocrinology and Metabolism
Taher ModarressiAmna N Khan

Abstract

Gestational gigantomastia is an uncommon condition characterized by abnormal and excessive growth of breast tissue during an otherwise uncomplicated pregnancy. Gestational gigantomastia may be accompanied by hypercalcemia, which in some cases has been associated with elevated serum levels of PTHrP. The source of the PTHrP in these cases has been suggested to be the enlarged breasts. To describe the rapid resolution of hypercalcemia and normalization of serum PTHrP after elective termination of pregnancy, indicating that the placenta was the source of the PTHrP. A retrospective analysis of clinical and biochemical data over a 2-year interval and review of literature. An academic medical center. A 33-year-old G8P4 female who presented at week 8 of pregnancy with gestational gigantomastia and subsequently developed marked hypercalcemia at week 13. Serum levels of PTH were suppressed but circulating PTHrP was elevated. There was no history of hypercalcemia or significant breast growth during previous pregnancies. Hypercalcemia was poorly responsive to IV saline, prednisone, calcitonin, and cinacalcet. She requested termination of pregnancy at week 20. Serum levels of calcium, PTH, and PTHrP normalized within 48 hours of termination...Continue Reading

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Citations

Dec 13, 2018·The Journal of Clinical Endocrinology and Metabolism·Elizabeth M Winter, Natasha M Appelman-Dijkstra
Apr 13, 2019·The Journal of Clinical Endocrinology and Metabolism·Taher ModarressiAmna N Khan
Feb 6, 2021·Endocrine·Natasha M Appelman-DijkstraElizabeth M Winter
Jun 23, 2020·Clinical Imaging·Shrilakshmi VyasLoretta M Strachowski

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