Introduction: Sarcoidosis is often an overlooked differential diagnosis in many disease processes. It is a nonspecific inflammatory disease marked by granulomas. Being nonspecific makes it a more difficult disease to diagnose. It is a challenging diagnosis as it is a great mimicker of many other conditions and therefore missed. The finding of a granuloma is not specific for sarcoidosis as other disorders may present with granulomas. It is an important differential to keep in mind because of significant morbidity and mortality associated with this disease. Case Report: Here we present a case of a female patient with vision loss and an intracranial mass. The mass was initially thought to be cancer and hence referred to our Cancer Center for further evaluation and workup. Upon biopsy the mass was diagnosed as sarcoidosis. She had no other systemic involvement at time of diagnosis. What makes this case of sarcoidosis rare is her solitary optic nerve involvement. Conclusion: Sarcoidosis is a more difficult disease to diagnose than other diseases, such as coronary artery disease, hyperlipidemia, and diabetes as these diseases have very specific, easily accessible