RHOA and angioimmunoblastic T-cell lymphoma: However, when the AITL cases with a RHOA-G17V mutation were compared with the RHOA-WT AITL cases, the difference in collagen density was moderate (median of 0.30% in RHOA-G17V AITL and 1.69% in RHOA-WT AITL, not significant, Supplementary Figure S7).