Choroid plexus papilloma of the third ventricle

Endoscopic monoportal removal of a choroid plexus papilloma in the posterior third ventricle in a child

“…12 According to many authors, CPPs localized in the third ventricle constitute a very rare subset of all CPPs. Eighty percent of third ventricular papillomas are located in the anterior region of the third ventricle, 6,8,11,24 and a posterior localization of CPPs in the third ventricle is very rare. 17 According to Galassi et al, 14% of choroid plexus tumors occur during the 1st year of life.…”

“…7 However, Nakano et al described a CPP in the posterior aspect of the third ventricle in a 42-year-old woman, and Tomasello et al treated a 49-year-old man with the same CPP localization. 17,24 Choroid plexus papillomas located in the third ventricle have their own characteristics. As the third ventricle is small and complex in its anatomy, it presents certain difficulties for surgical tumor removal.…”

Choroid Plexus Papilloma of Third Ventricle

“…Gliomas have considerable overlapping features with papillomas making reliable distinction difficult [7]. Angiography in such situations can be helpful as it will demonstrate tumour stain and well defined choroidal vessels in the case of papillomas [9]. It also helps in surgical planning.…”

“…Third ventricular choroid plexus papillomas could be removed through transcallosal or transcortical approaches [9]. Interforniceal approach is required for larger lesions which cannot be removed through the foramen of Monro, as it provides wider access to the third ventricle [10].…”

“…36% operative mortality rates have been reported for third ventricular choroid plexus papillomas. However, where total.excision was achieved it came down to 16% [9]. If these are not excised totally, they will recur [7] and therefore total excision is ideal.…”