Background: Dermoid cysts (DCs) are rare congenital intracranial tumors. Among these tumors, extracranial and intracranial combined localization is extremely rare. Case Description: We present the case of a 49-year-old female patient with no prior medical history, diagnosed with an extradural and intradural extra-axial DC in the left temporo-parietal region, which manifested with signs of increased intracranial pressure. Cerebral magnetic resonance imaging showed an extra-axial lesional process with a cystic signal in the left temporo-parietal region. Surgical resection was successfully performed through a wide left temporo-parietal craniotomy. Histopathological findings were consistent with a DC. The postoperative recovery was uneventful, with improvement of increased intracranial pressure symptoms. Conclusion: A rare case of combined extra- and intracranial DC of extradural and intradural localization in the temporoparietal region was reported. The tumor was completely removed by wide craniotomy. DCs can occur anywhere in the intracranial and extracranial space. Although they are benign tumors, serious complications can arise if they are not treated promptly and appropriately. Total radical resection is the best solution.
Cisse et al. (Fri,) studied this question.