Intradiploic epidermoid cysts are congenital benign lesions. They commonly occur intracranially. Intradiploic epidermoid cyst of the calvarium is very rare and few cases have been reported to date. We describe a giant intradiploic epidermoid cyst of the occipital bone with CT and MRI characteristics including DW imaging and ADC values.
CiappettaP.ArticoM.SalvatiM. Intradiploic epidermoid cysts of the skull: Report of 10 cases and review of the literature. Acta Neurochururgica (Wien). 102:33–37 (1990).
2.
OsbournAG. Text Book of Diagnostic Neuroradiology. Elsevier Health Sciences Publication. 1st edition. p. 632.
3.
SargentEWGarciaPPanielloRC. Giant Intradiploic epidermoid cyst of greater sphenoid wing causing unilateral proptosis and optic nerve compression. J Skull Base Surg. 1993; 3: 55–59.
4.
BikmazKCosarMBekS. Intradiploic epidermoid cysts of the skull: a report of four cases. Clin Neurol Neurosurg. 2005; 107: 262–267.
5.
JakubowskiEKirschEMindermannT. Intradiploic epidermoid cyst of frontal bone presenting with tension pneumocephalus. Acta Neurochirurgica (Wien). 1997; 139: 86–87.
6.
BaxterJWNetskyMG. Epidermoid and dermoid tumors. In WilkinsRHRengacherySS eds. Neurosurgery. Vol I. McGraw-Hill; 1985. p. 655–661.
7.
RugeJRTomitaTNaidichTP. Scalp and calvarial masses of infants and children. Neurosurgery. 1988; 22: 1037–1042.
8.
PumerJOteroECastineiraA. Intradiploic epidermoid tumor of occipital bone. X-ray, CT, MRI findings. Euro Radiol. 1993; 3: 183–185.
9.
AtalarMHNuri SenerRIcagasiogluD. Epidermoid cyst in a girl: constructive interference in steady-state and diffusion-weighted imaging findings. J Paed Neurol. 2006; 4: 211–214.
