Sir, According to the widely accepted embryogenetic theory of Erdheim, craniopharyngiomas take their origin from the remnant of craniopharyngeal duct or Rathke's pouch.[1] These lesions are usually located in the suprasellar and sellar regions, and can be found anywhere from the floor of the third ventricle to the pituitary gland. They can extend into the anterior (2-5%), middle (2%), or posterior (1-4%) cranial fossa. Ectopic locations include within the third ventricle, nasopharynx, sphenoid bone, cerebellopontine angle, and pineal region.[2] Cases are also reported with the presence of these tumors in lateral and fourth ventricles. [3-4] Some of these ectopic locations are explained by migration of the craniopharyngioma from the site of the craniopharyngeal duct, where these tumors arise.
展开▼
