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Case No. 670
2023-10-01~2023-10-31
출제자 : 조세진
Hit : 480
| Period | 2023-10-01~2023-10-31 |
|---|---|
| Diagnosis | Labyrinthitis ossificans |
| Gender |
|
| Age | 30 |
| Clinical information | Question> 4살 뇌수막염(주증상: 고열)이후 발생한 양측 청력 손실로 내원한 환자이다. 진단은? F/30Y Symptom: Bilateral profound hearing loss Images> Temporal bone CT (both axial and coronal view), axial heavily T2WI, contrast enhanced T1WI |
| Discussion | CT: High-density bone deposition within the membranous labyrinth: - mild disease: hazy increase in density within fluid spaces of the membranous labyrinth - moderate disease: focal areas of bony encroachment on fluid spaces of the membranous labyrinth - severe disease: membranous labyrinth completely obliterated by bone replacing fluid spaces MRI: loss of normal high signal of fluid within the membranous labyrinth is seen on heavily T2 weighted images (as low signal intensity foci in the labyrinth) Reference: Becker TS, Eisenberg LS, Luxford WM, House WF. Labyrinthine ossification secondary to childhood bacterial meningitis: implications for cochlear implant surgery. (1984) AJNR. American journal of neuroradiology. 5 (6): 739-41. Pubmed |
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