Pituitary adenoma staging

Pituitary adenoma Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2]

Staging

The radioanatomical classification places adenomas into 1 of 4 stages:

• Stage I are microadenomas (<1 cm) without sella expansion
• Stage II are macroadenomas (≥1 cm) and may extend above the sella
• Stage III are macroadenomas with enlargement and invasion of the floor or suprasellar extension
• Stage IV are macroadenomas that cause destruction of the sella