title: Vestibular schwannoma and tuberculoma occurring In collision in the posterior fossa: A case report.
abstract: BACKGROUND
  Though acoustic schwannoma is the most common primary tumour in the cerebello-pontine angle, its occurrence with tuberculoma has never been reported.
  
  
  METHODS
  A case of a vestibular schwannoma and tuberculoma occurring as collision tumors in the posterior fossa in a 46 years old female is reported. She presented with chronic raised intracranial pressure manifesting as headache, occasional diplopia, speech disturbance, and unsteady gait. Magnetic resonance imaging of the brain demonstrated a vestibular schwannoma and tuberculoma in the right cerebello-pontine angle. The lesions were resected through retro sigmoid route. The caudal mass was vestibular schwannoma while the rostral and medial portion was tuberculoma.
  
  
  CONCLUSIONS
  The occurrence of a vestibular schwannoma and tuberculoma in collision has hitherto never been reported. The pathogenesis, surgical challenges and management of such a rare entity is discussed and the relevant literature is briefly reviewed.
  
  
  CONCLUSIONS
  The association of vestibular schwannoma and tuberculoma is rare. Surgical excision of lesions occurring in collision can be formidable. They require careful planning and strategy.
authors.affiliation: Department of Neurosurgery, King Edward Memorial Hospital and Seth Gordhandas Sunderdas Medical College, Parel, Mumbai, India.
authors.forename: Dattatraya
authors.initials: D
authors.lastname: Muzumdar
authors.affiliation: Department of Neurosurgery, King Edward Memorial Hospital and Seth Gordhandas Sunderdas Medical College, Parel, Mumbai, India.
authors.forename: Amit
authors.initials: A
authors.lastname: Mahore
authors.affiliation: Department of Neurosurgery, King Edward Memorial Hospital and Seth Gordhandas Sunderdas Medical College, Parel, Mumbai, India. Electronic address: drraghavr@gmail.com.
authors.forename: Raghvendra
authors.initials: R
authors.lastname: Ramdasi
authors.affiliation: Department of Neurosurgery, King Edward Memorial Hospital and Seth Gordhandas Sunderdas Medical College, Parel, Mumbai, India.
authors.forename: Mrudul
authors.initials: M
authors.lastname: Bhatjiwale
keywords: Cerebello-pontine angle; Collision; Posterior fossa; Schwannoma; Tuberculoma