Pituitary microadenomas are small tumors found in the pituitary gland, often measuring less than 10 millimeters in diameter. Despite their size, they can cause hormonal imbalances by either secreting excessive hormones or by pressing on surrounding pituitary tissue, disrupting normal hormone production. Commonly detected incidentally during brain imaging for unrelated reasons, these tiny growths may lead to symptoms such as headaches, vision changes, or hormonal disturbances, depending on their location and hormone secretion patterns.