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| Initial Biopsy n (%) | Second Biopsy n (%) | |
|---|---|---|
| Medial Fibrosis | 13 (33%) | 24 (60%) |
|
| ||
| Calcification | ||
| Limited to the IEM | 9 (23%) | 7 (18%) |
| Medial | 1 (3%) | 1 (3%) |
|
| ||
| Disruption/Duplication of IEM | 40 (100%) | 39 (98%) |
|
| ||
| Intimal fibroplasia | ||
| absent/mild* | 37 (92%) | 33 (82%) |
| Moderate/severe† | 3 (8%) | 7 (18%) |
n=number of cases; IEM=internal elastic membrane
causing <25% luminal narrowing
causing ≥25% luminal narrowing
