CPT® Code 64790

Excision of neurofibroma or neurolemmoma, as described by CPT® Code 64790, involves the surgical removal of tumors that affect major peripheral nerves. Neurofibromas are benign tumors that arise from the proliferation of Schwann cells, which are the cells that form the myelin sheath around peripheral nerves. These tumors can occur as solitary lesions or, more commonly, in multiples as part of a genetic condition known as neurofibromatosis. Neurofibromatosis presents with a wide spectrum of severity, ranging from mild cases with few tumors to severe cases characterized by numerous debilitating tumors. While most neurofibromas are benign, certain types, such as plexiform neurofibromas, can have the potential to transform into malignant tumors. Neurolemmomas, on the other hand, are tumors that originate from the outer sheath of Schwann cells, known as the neurolemma. The excision procedure for neurofibromas and neurolemmomas from major peripheral nerves is more complex than that for cutaneous tumors, as it requires careful dissection to preserve nerve function and integrity. The surgical approach involves exposing the affected nerve, dissecting the tumor from surrounding tissues, and ensuring proper closure of the nerve sheath post-excision to maintain nerve health and function.