Isolated primary craniopharyngioma in the cerebellopontine angle

An isolated primary Rathke's cleft cyst in the cerebellopontine angle

“…4,6,10,17,19,21 However, it seems more appropriate to consider these lesions as an extension of intrasellar or suprasellar RCCs because of their close relationships with the originating site of Rathke's pouch. Khalatbari et al 16 also suggested that most of the ectopic craniopharyngiomas described in past publications are essentially various extensions of large suprasellar lesions. In this regard, ectopic RCCs primarily developed beyond the craniopharyngeal canal are rather rarely reported in the literature.…”

“…5,7,11,13 Multiple cases of the isolated CPA craniopharyngioma have been reported. 3,16,20,24 Therefore, it is reasonable to assume that the formation mechanism of ectopic RCC is similar to that of craniopharyngioma. Rathke's pouch arises as an invagination of the primitive oral cavity and fuses with the developing neural tube at the early embryological period.…”

Isolated petrous apex ectopic craniopharyngioma

“…7 The post-operative occurrence of ectopic craniopharyngiomas by direct mechanical transplantation or meningeal seeding is a recognized phenomenon. 3,8 Nevertheless, histologically confirmed primary craniopharyngioma at an ectopic location is rare, although cases of epidural, 5 frontotemporal, 8 posterior fossa, 2,6,9 and infrasellar craniopharyngiomas 1,4,10,11 have been reported. On the other hand, primary isolated petrous apex craniopharyngioma has not been previously reported.…”

“…Generally, the symptoms could consist of visual, endocrine, or cognitive disturbance, and all the symptoms related with high intracranial pressure. [1][2][3][4][5][6][7][8][9][10][11] In this case, the symptom was only double vision with esotropia (in-turning eye) on examination. We believed that it was caused by compression on the sixth nerve by tumor protrusion to the prepontine cistern and the direct compression to the Dorello's canal.…”

“…[1][2][3] Commonly it is located at the suprasellar region, either anterior or posterior to the optic chiasma. [1][2][3][4][5] Isolated infrasellar craniopharyngiomas without sellar involvement are extremely rare. 4,6 Isolated craniopharyngioma in the petrous bone has never been reported.…”