Final answer:
When a brain tumor places pressure on the pituitary gland, one manifestation of dysfunction to be alert for is hypothyroidism.
Step-by-step explanation:
When a brain tumor increases in size and places pressure on the pituitary gland, it can lead to dysfunction in the gland. One manifestation of pituitary gland dysfunction to be alert for is hypothyroidism, which is characterized by an underactive thyroid gland. This can result in symptoms such as weight gain, cold sensitivity, low heart rate, and fatigue. Therefore, the correct answer is c) Hypothyroidism. The other options, hypertension, hyperthermia, and hyperglycemia, are not typically indicative of pituitary gland dysfunction.