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Diffuse Leptomeningeal Glioneuronal Tumor with FGFR1 Mutation in a 29-Year-Old Male

29세 남성에서 발생한 FGFR1 돌연변이를 동반한 미만성 연수막성 신경교종

  • Minsu Kim (Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine) ;
  • Ki Rim Lee (Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine) ;
  • Gheeyoung Choe (Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine) ;
  • Kihwan Hwang (Department of Neurosurgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine) ;
  • Jae Hyoung Kim (Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine)
  • 김민수 (서울대학교 의과대학 분당서울대학교병원 영상의학과) ;
  • 이기림 (서울대학교 의과대학 분당서울대학교병원 병리과) ;
  • 최기영 (서울대학교 의과대학 분당서울대학교병원 병리과) ;
  • 황기환 (서울대학교 의과대학 분당서울대학교병원 신경외과) ;
  • 김재형 (서울대학교 의과대학 분당서울대학교병원 영상의학과)
  • Received : 2022.08.21
  • Accepted : 2022.11.13
  • Published : 2023.07.01

Abstract

This study reports on diffuse leptomeningeal glioneuronal tumor (DL-GNT) in a 29- year-old male. DL-GNT is a rare central nervous system (CNS) tumor mostly seen in children and only few cases have been reported in adult patients. Our patient presented with a chronic headache that lasted for five months. MR imaging showed mild hydrocephalus, multiple rim-enhancing nodular lesions in the suprasellar cistern, diffuse leptomeningeal enhancement in the lumbosacral area, and multiple small non-enhancing cyst-appearing lesions not suppressed on fluid attenuated inversion recovery (FLAIR) images in the bilateral basal ganglia, thalami, and cerebral hemispheres. Under the impression of germ cell tumor with leptomeningeal seeding, the patient underwent trans-sphenoidal tumor removal. DL-GNT was pathologically confirmed and FGFR1 mutation was detected through a next-generation sequencing test. In conclusion, a combination of leptomeningeal enhancement and multiple parenchymal non-enhancing cyst-appearing lesions not suppressed on FLAIR images may be helpful for differential diagnosis despite overlapping imaging features with many other CNS diseases that have leptomeningeal enhancement.

29세 남성에서의 미만성 연수막성 신경교종을 증례 보고한다. 이 질환은 드문 중추신경계 종양으로, 대부분 소아에서 발견되며 성인에서는 소수만 보고되어 있다. 본 환자는 만성 두통으로 내원하여 MRI를 시행하였다. 뇌 MRI에서 경도의 수두증과 다수의 테두리 조영증강을 보이는 병변이 안장위 수조에서 보였으며, FLAIR에서 신호가 억제되지 않는 다수의 비조영증강 낭종성 병변이 양측 기저핵, 시상 및 대뇌에서 관찰되었다. 척추 MRI에서는 요추 및 천추부위의 미만성 연수막 조영증강이 보였다. 생식세포종양의 연수막 파종을 의심하였고 경접형골 종양제거술을 시행 받았다. 병리학 검사에서 미만성 연수막성 신경교종으로 확진되었고, 차세대 염기서열 검사에서 FGFR1 유전자의 돌연변이가 발견되었다. 결론적으로 연수막 결절성 조영증강과 FLAIR에서 신호가 억제되지 않는 다수의 비조영증강 낭종성 뇌 병변이 함께 관찰될 경우 연수막 조영증강을 보이는 여러 다른 질환들과의 감별 진단에 도움이 된다.

Keywords

References

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