Trisomy 12 is seen within a specific subtype of B-cell chronic lymphoproliferative disease affecting the peripheral blood/bone marrow and co-segregates with elevated expression of CD11a - Su'ut, L.; O'Connor, S.; Richard, S.J; Jones, R.A; Robert, B.E; Davies, F.E; Fegan, C.D; Jack, A.S; Morgan, G.J. (British Journal of Haematology, 1998)