ANSWER CASE 3
Gelfilm" and "Gelfoam" are made from absorbable gelatin and, in
the form of a thin film or a sponge, are used to control
bleeding in various surgical procedures. They may be encountered
in sections usually adhering to a surface as seen here where
Gelfoam is associated with the capsule of the spleen. The
gelatin foam has a characteristic appearance with slightly
basophilic gelatin walls of varying thickness surrounding
distorted spaces which may contain blood cells or other cell
types. Typically there is no tissue reaction to the presence of
this material. Because this material consists of gelatin it
infiltrates well with paraffin and generally does not pose a
problem when sections are being prepared. So the answer is
gelfoam or surgical sponge contamination.
