Adrenal cysts, first described in 1670, typically presented with abdominal pain or palpable mass. In the modern era, incidentally identified adrenal cysts are commonplace, as imaging studies have become a mainstay in patient evaluation. The rubric of adrenal cysts comprises a broad differential diagnosis, rendering definitive diagnosis and subsequent management difficult. These cysts are categorized into four subtypes: endothelial, pseudocyst, epithelial, and parasitic. Endocrine workup should rule out functional status. Radiologic differentiation is helpful; however, imaging characteristics, such as hemorrhage in a pseudocyst, can confound identification of benign versus malignant lesions. Any functional lesion, potentially malignant lesion, or benign lesion more than 5 cm in diameter deserves surgical treatment. For small, benign lesions, conservative management is a viable option, although no surveillance protocols have been described.