  Five types of blow-up patterns that can occur for the 4th-order semilinear
parabolic equation of reaction-diffusion type
  $$ u_t= -\Delta^2 u + |u|^{p-1} u \quad {in} \quad \ren \times (0,T), p>1,
\quad \lim_{t \to T^-}\sup_{x \in \ren} |u(x,t)|= +\iy, $$ are discussed. For
the semilinear heat equation $u_t= \Delta u+ u^p$, various blow-up patterns
were under scrutiny since 1980s, while the case of higher-order diffusion was
studied much less, regardless a wide range of its application.

Analysis of PDEs