Question

which procedure involves excision of the pituitary gland through the nasal cavity via the sphenoid sinus without disturbing brain tissue?
a exophthalmometry
b transsphenoidal hypophysectomy
c rhinotomy
d encephalectomy

Explanation:

• Exophthalmometry: This is a measurement of the protrusion of the eyeball, not related to pituitary gland excision.
• Transsphenoidal hypophysectomy: The pituitary gland (hypophysis) is accessed through the sphenoid sinus (transsphenoidal), which matches the description of excision without disturbing brain tissue.
• Rhinotomy: This is an incision into the nose, not specifically for pituitary gland removal.
• Encephaleotomy: This involves an incision into the brain, which contradicts the "without disturbing brain tissue" part.

Answer:

B. transsphenoidal hypophysectomy