RESUMO
Intracranial dermoid cysts generally occurring along the midline are rare. They are benign, congenital, slow-growing cystic lesions located inside the skull. They account for<1% of all primary intracranial tumors and are more common in females in the first three decades of life. Many intracranial dermoid cysts are asymptomatic and are found by chance when brain imaging is carried out for other reasons. Clinical presentation usually relates to compression of adjacent structures or spontaneous rupture of the cyst. The signs and symptoms may range from headaches, seizures to cerebral ischemia. On CT imaging these lesions usually appear as well-defined lobulated midline masses with low attenuation and hyperintense on T1-weighted MRI imaging. We hereby report a case of an 18-year-old female presented with history of seizures involving right upper limb which spread to other limbs associated with frothing and tongue bite- 3 episodes since 2 months. She also had cleft lip. On examination CT images showed hypodense lesion in intrahemispheric region in frontal lobe and MRI image with contrast showed hyperintense T2W, hypointense T1W/FLAIR lesion. A diagnosis of an intracranial dermoid cyst in the intrahemispheric region of frontal lobe was made and the patient was advised a surgical excision of the cyst.
RESUMO
Intracranial dermoid cyst is a rare congenital disease originating in the embryo. Intracranial dermoid cysts are usually detected before five years of age; however, asymptomatic cysts have been discovered after the third decade of life through various complications. Sometimes, there are neurologic symptoms caused by a cystic mass effect and if there is a dermoid sinus, purulent infections can occur. Early diagnosis is important and as such, CT or MR imaging for recognition of the location, size, and characteristics of the cysts are recommended before surgical resection. Extradural dermoid cysts with an intact occipital dermoid sinus are a rare event. We report a case of intracranial dermoid cyst associated with scalp abscess. In this case, a three-year-old boy was presented with scalp abscess and we performed MR imaging, which revealed a cystic region. The prognosis after resection operation was good without any complication.