Ectopic craniopharyngiomas

Area of Science:

• Neuro-oncology
• Developmental Biology
• Pathology

Background:

• Craniopharyngiomas (CPs) are rare, World Health Organization (WHO) grade 1 tumors originating from embryonic remnants in the sellar/parasellar region.
• Ectopic CPs can occur in atypical locations such as the nasopharynx, orbit, posterior fossa, brain parenchyma, and spine.
• These ectopic tumors present either as primary growths in unusual sites or as secondary recurrences after treatment in the orthotopic location.

Purpose of the Study:

• To review the pathogenesis, clinical presentation, diagnosis, and management of primary and secondary ectopic craniopharyngiomas.
• To analyze a comprehensive dataset of 97 published ectopic CP cases (42 primary, 55 secondary) from 2000-2025.

Main Methods:

• Literature review of published cases of ectopic craniopharyngiomas.
• Analysis of case series focusing on ectopic tumor characteristics and outcomes.

Main Results:

• Primary ectopic CPs arise from embryologically misplaced tissue or genetic tumor development outside the sella.
• Secondary ectopic CPs result from tumor cell dissemination via surgical tracts, cerebrospinal fluid (CSF), or meningeal seeding.
• Ectopic craniopharyngiomas present unique diagnostic and therapeutic challenges.

Conclusions:

• Understanding the distinct pathogenesis of primary versus secondary ectopic CPs is crucial for effective management.
• Ectopic craniopharyngiomas require tailored diagnostic and therapeutic strategies due to their atypical locations and origins.
• Further research into the specific mechanisms and optimal treatments for these rare tumors is warranted.