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nlm-article

Giuseppe Cinalli, Maria Rosaria Scala, Alessandra Marini, Alessia Imperato, Giuseppe Mirone, and Pietro Spennato

In this video, the authors present an interhemispheric transcallosal transchoroidal approach to a pineal mass in a 15-year-old boy. He received emergency endoscopic third ventriculostomy (ETV), then an endoscopic biopsy that revealed an immature teratoma. Surgical removal was selected. The mass was located very high in the posterior third ventricle, hidden behind the splenium of the corpus callosum and the vein of Galen, so an interhemispheric transcallosal approach followed by a complete dissection of the whole choroidal fissure was chosen and allowed complete removal of the tumor. Microsurgical dissection is presented, showing clearly in detail all the neurovascular structures encountered.

The video can be found here: https://stream.cadmore.media/r10.3171/2021.4.FOCVID2126.

Open access

nlm-article

Maria Rosaria Scala, Pietro Spennato, Antonio Della Volpe, Claudia Santoro, Stefania Picariello, Alfonso Maria Varricchio, Claudio Ruggiero, Serena dé Santi, and Giuseppe Cinalli

The authors present the case of removal of a Koos grade IV right acoustic neuroma in a neurofibromatosis type 2 (NF2) patient, already operated on for left cerebellopontine angle meningioma at 7 years of age and a left acoustic neuroma at 16 years of age. A transpetrosal approach allowed cochlear sensor implantation to detect residual hearing. An enlarged retrosigmoid approach then allowed subtotal microsurgical removal of the lesion; consequently, the authors illustrate the technical nuances of an auditory brainstem implant (ABI). One month after surgery, the ABI was successfully switched on, giving back hearing perception to the patient.

The video can be found here: https://stream.cadmore.media/r10.3171/2021.7.FOCVID2188