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Case No. 592
2021-06-01~2021-06-30
출제자 : 이경식
Hit : 552
| Period | 2021-06-01~2021-06-30 |
|---|---|
| Diagnosis | Lateralized petrous ICA |
| Gender |
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| Age | 27 |
| Clinical information | Hx> 3~4년 전부터 있어온 오른쪽 tinnitus를 주소로 내원한 27세 여자환자의 CT와 MRA영상입니다. 가능한 진단은? |
| Discussion | Lateralized petrous ICA :Anatomic variation of the course of the petrous segment of the internal carotid artery (ICA). More posterolateral entrance to the skull base and protrusion into the anterior mesotympanum on CT. * CT finding: Genu of the vertical and horizontal segments of the petrous ICA is more lateral than the mid-portion of the basal turn of the cochlea * Differential diagnosis - Aberrant ICA: course through the middle ear, appearing passes lateral to the cochlear promontory. |
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Correct Answer
Semi-Correct Answer |