CPT® Code 61545

A craniopharyngioma is a type of benign tumor that typically contains both cystic (fluid-filled) and solid components. This tumor originates from the remnants of the craniopharyngeal duct, which is located near the base of the pituitary gland. The procedure associated with CPT® Code 61545 involves a craniotomy, which is a surgical operation where a section of the skull is removed to access the brain. In this specific case, the craniotomy is performed to excise the craniopharyngioma. The surgical approach begins with an incision made in the skin above the eyebrows, allowing access to the tumor through a supraorbital craniotomy. This method involves creating scalp flaps and drilling burr holes in the supraorbital region. The bone between these burr holes is then cut using a saw or craniotome, and a bone flap is elevated to expose the underlying dura mater, which is subsequently opened and retracted. Careful dissection of the brain tissue is performed to expose the tumor while preserving critical surrounding structures. The tumor is meticulously dissected from the surrounding tissue and excised. An intraoperative evaluation by a pathologist is conducted to assess the margins of the excised tissue. If the margins are found to contain abnormal tissue, further excision is performed, provided that critical structures can be spared. The excision process continues until the margins are clear or until the neurosurgeon determines that the maximum safe amount of tumor has been removed. After the tumor removal, the dura is closed, the bone flap is replaced and secured using sutures, wires, or miniplates and screws, and finally, the overlying muscle and skin are repaired and closed in layers.