Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Posterior Fossa Teratomas in Adults : A Systematic Review

  • Shin, Dong-Won (Department of Neurosurgery, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Kim, Jeong Hoon (Department of Neurosurgery, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Song, Sang Woo (Department of Neurosurgery, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Kim, Young-Hoon (Department of Neurosurgery, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Cho, Young Hyun (Department of Neurosurgery, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Hong, Seok Ho (Department of Neurosurgery, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Nam, Soo Jeong (Department of Pathology, Asan Medical Center, College of Medicine, University of Ulsan)
  • Received : 2020.12.08
  • Accepted : 2021.02.09
  • Published : 2021.11.01
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Abstract

Objective : The occurrence of posterior fossa teratomas in adulthood is extremely rare. In this study, we aimed to report our experience with two cases of posterior fossa mature teratoma in adults who underwent surgical resection. We also performed a systematic review of published papers available to date. Methods : We retrospectively reviewed the electronic medical records of patients who had onset of posterior fossa teratomas in adulthood at our institute between 1995 and 2020. We evaluated the clinical, radiographic, and pathological features of mature teratomas at the posterior fossa in adulthood. Furthermore, we searched the PubMed, EMBASE, and Web of Science database and reviewed published articles. Results : We found 507 articles on database review; of them, 102 were duplicates and 389 were excluded based on the inclusion criteria. Finally, 16 cases of posterior fossa from the web search and related articles. Subsequently, we added two cases that underwent surgery at our institute. We analyzed a total of 18 cases of mature teratomas. Headache was the most common (55.6%) symptom. The teratomas showed heterogeneous signals on magnetic resonance imaging. Thirteen patients (72.2%) had lesion at midline, five patients (27.8%) had calcification. Surgical resection was performed in all patients. No studies reported recurrence after resection. Conclusion : The occurrence of posterior fossa teratomas in adulthood is difficult to diagnose at the initial stage. Radiographic diagnosis alone can lead to misdiagnosis. Pathological confirmation is essential. Surgical resection is a curative option for posterior fossa teratomas in adulthood.

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References

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