Intradiploic epidermoid cysts are uncommon, slow-growing, benign tumors, ac-counting for approximately 1% of intracranial tumors. They can be congenital or ac-quired; most of them are located intradurally and rarely in the scalp. These lesions usually manifest as painless, gradually enlarging masses over years or decades. They are clinically and radiographically difficult to differentiate from other calvarial lesions. Accurate radiological assessment and complete surgical excision of the lesion and its capsule play a crucial role in ensuring favorable long-term outcomes. We present a case of a young female diagnosed with an epidermoid cyst in the right temporal bone who underwent complete and successful surgical treatment. A complete imaging study was obtained including X-rays and computed tomography and magnetic resonance imaging scans, which demonstrated pathognomonic findings of an epidermoid cyst. We review the relevant literature, pathogenesis, radiographic characteristics, and di-agnosis of the epidermoid cysts.