Singularities of codimension two mean curvature flow of symplectic   surfaces
  We prove that for a mean curvature flow of a compact symplectic surface in a compact Kaehler-Einstein surface, the tangent cone at the first blow-up time consists of a finite union of more than two 2-planes in $R^4$ which are complex in a complex structure on $R^4$. 
Jingyi Chen and Jiayu Li