November 2022 in “Journal of the Endocrine Society” Removing the ovarian tumor improved the woman's hormonal symptoms.
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November 2006 in “Journal of Veterinary Diagnostic Investigation” An alpaca acted like a male and couldn't have babies because of a benign tumor in its ovary that caused high testosterone levels.
August 2019 in “Journal of Dermatology” Woman with diabetes had hair loss due to rare ovarian tumor; surgery improved hair growth.
October 2023 in “BMC endocrine disorders” A pineal tumor caused a boy's early puberty, which changed from peripheral to central after treatment.
August 2025 in “Journal of Pediatric Endocrinology and Metabolism” A rare ovarian tumor in a 2-year-old girl was successfully removed, normalizing her hormone levels.