Another possibility as alerted by Roksolyana R Tourkevich MD Noticed when reading the MRI of 6-12-2025 of Amy’s head, a cystic lesion of the left hypothalamus measuring 5x4mm, with mild mass effect upon the left mamillary body. The hypothalamus sits at the heart of this puzzle. It’s a small but critically important region, tucked deep in the brain, just above the pituitary gland. You can think of it as the “master regulator” that tells the pituitary what to do—and by extension, it influences nearly every hormone system in the body…. Directs the body’s chemical factory Here’s a breakdown of its main functions and why a cystic lesion of the left hypothalamus measuring 5x4mm, with mild mass effect upon the left mamillary body could be significant for Amy. o The hypothalamus produces “releasing” and “inhibiting” hormones that tell the pituitary gland to either produce or hold back its hormones. o This impacts stress hormones (cortisol via ACTH), thyroid hormones (energy/metabolism), growth hormone, reproductive hormones (LH, FSH), and more. 2. Autonomic Nervous System Control o Helps regulate heart rate, blood pressure, and breathing rhythms. o This may explain episodes of racing heart, anxiety surges, or sudden weakness. 3. Homeostasis (Body Balance) o Maintains body temperature, hunger/thirst, and sleep–wake cycles. o Disruptions can cause dizziness, fatigue, poor sleep, and feelings of imbalance. 꾆 Core Functions of the Hypothalamus 1. Endocrine Regulation (Hormones)
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