CPT® Code 61546

The procedure described by CPT® Code 61546 involves a craniotomy specifically for the purpose of hypophysectomy or the excision of a pituitary tumor through an intracranial approach. The pituitary gland, a small but crucial endocrine gland, is located at the base of the skull, nestled in a bony structure known as the sella turcica, which is situated just behind the bridge of the nose. This gland plays a vital role in regulating various hormonal functions in the body. In cases where a pituitary tumor is present, surgical intervention may be necessary to remove the tumor and restore normal gland function. The intracranial approach is typically employed when the tumor extends beyond the confines of the sella turcica, necessitating a more invasive surgical technique. During the procedure, an incision is made above the eyebrows, and a supraorbital craniotomy is performed to access the tumor. This involves creating scalp flaps, drilling burr holes, and cutting a bone flap to gain entry to the cranial cavity. Once inside, the dura mater, which is the outer protective layer of the brain, is opened to expose the frontal lobe and the pituitary gland or tumor. The surgeon meticulously dissects the tumor from surrounding tissues, ensuring that any abnormal margins are evaluated by a pathologist during the operation. The goal is to excise as much of the tumor as possible while preserving critical surrounding structures. After the excision, the dura is closed, the bone flap is replaced and secured, and the overlying tissues are repaired in layers. This detailed surgical approach is essential for effectively treating pituitary tumors while minimizing potential complications.