1. Introduction
Neurotology and skull base surgery is a wonderful career path. We highly recommend it! Patients range in age from the very young to the elderly and range in health from being completely normal to having multiple severe comorbidities. The pathologies are variable, spanning the spectrum from uncomplicated benign lesions to highly complex life-threatening lesions. Operating in and around the skull base is complex because of the detailed anatomy, large vascular structures, and the presence of cranial nerves. As you become an expert in this anatomy, you will be able to resect formidable-appearing tumors with superb survival rates and limited morbidity. Most patients will return to active and productive lives.
The importance of having a dedicated skull base surgical team cannot be overstated. There is a synergistic effect when the group works as a coordinated team in the management of these complex tumors and pathologies. A dedicated neurotologist, neurosurgeon, neuroradiologist, radiation oncologist, intraoperative monitoring technician, proficient surgical scrub, and experienced ICU staff are all critical to success. A high case volume is required to generate the necessary expertise.
The increasing use of stereotactic radiotherapy and observation strategies to treat vestibular schwannoma has led to a decline in surgical volume. However, these strategies have added options that increase patient choice and have improved outcomes for many patients. Since benign skull base tumors often have minimal presenting symptoms, surgical treatment and associated cranial neuropathies may make a patient feel worse after treatment than before treatment. Involving the patient in the selection of treatment planning, in our opinion, makes them much more satisfied when living with side effects after the chosen treatment strategy. Thus, you should embrace the consideration of these and any other future treatment strategies and always discuss these options.
This atlas contains both illustrations and case examples. The illustrations show the anatomy and the key steps in the surgical approaches. The case examples highlight unique features relevant to the approach. For example, pre- and postoperative radiographic images are included to demonstrate representative pathologies and the expected results. Similarly, intraoperative photos demonstrate specific features of the procedure that are often quite subtle but, when followed, can help to achieve ideal results. Most importantly, we have found that the careful review of case examples is an excellent way to teach residents and fellows the process of surgical decision-making. When you have a challenging case, we hope that by scanning the cases in this book, you will be able to find a similar case that can help guide your treatment planning.
Each chapter in this atlas covers approaches to different regions of the skull base. However, the head and neck are not easily divided up as many structures involve multiple regions. Also, many tumors involve more than one region. Thus, many of the approaches overlap. For example, a temporal bone tumor invading into the parotid gland and posterior fossa may be best treated with a transcochlear approach (Chap. ). Do not feel limited by the nomenclature of each approach, which is based upon CPT coding. Instead, treat each patient as an individual by considering the physical exam and radiographic imaging findings when deciding what structures need to be removed and what can be preserved. This thought process will help you to figure out which approach or combination of approaches will best allow you to perform the procedure you wish to perform. Many tumors call for creativity, an exciting aspect of the specialty.
2. General Principles