Dermoid cysts of the posterior fossa – morbid associations of a benign lesion

Abstract

Dermoid cysts of posterior fossa are uncommon benign lesions. They differ from other lesions found in the infra tentorial compartment by virtue of their associated conditions. Due to their association with dermal sinus tracts, intracranial infection is a potential threat following infection of the cyst. Due to their embryologic origin, these cysts may also be associated with other congenital anomalies. In this article we detail our eleven-year-experience with posterior fossa dermoid cysts in fifteen patients. Despite the morbid presentation with severe life-threatening complications, the overall outcome was excellent. Implications of the various associations are discussed.

Occipital intraosseous dermoid cyst with restricted diffusion on magnetic resonance imaging in a child

“…The prognosis is overall favorable. In a case series of 15 patients diagnosed with posterior fossa dermoid cysts, the overall outcome was excellent despite differences in timing of presentation and treatment [13] . As our case demonstrates, even in cases with postoperative complications, patients may still fully recover with little to no residual neurologic sequelae.…”

Microsurgical Resection of Craniocervical Dermoid Cyst by Far Lateral Approach: Case Report and Literature Review

“…12,13 Dermoid tumors located in the posterior fossa are frequent and usually require an appropriate surgical route to minimize brain retraction, postoperative edema and risk of recurrence. 14,15 The far lateral approach seems to be an excellent route to totally remove posterior fossa lesions that occupy the most anterior face of brain stem, cerebellum and ventral foramen magnum. 16,17 This approach has been used for many neurosurgical pathologies of the posterior fossa, including tumors, such as meningioma and chordoma, and posterior circulation aneurysm.…”

“…Classically, the standard incision for the far lateral suboccipital approaches has been the "reverse hockey stick" incision, in which the skin and muscles of the suboccipital area are elevated and reflected inferiorly. [14][15][16][17] However, Lau and colleagues 21 proposed a C-shape incision as an alternative to reduce muscle retraction and postoperative cervical pain. Vertebral artery exposure is also an essential step to safely perform the approach.…”

Posterior fossa infected dermoid with congenital heart disease: A novel hypothesis of an unusual association

“…[ 1 15 16 17 18 ] They occur predominantly in the posterior fossa, particularly in the midline. [ 3 19 20 21 22 ] In about 66%, the dermoid cysts are associated with some form of dermal sinus. [ 4 ] Some of these dermoid cysts can get infected with dermal colonizing bacteria and cause deeper suppurations.…”