we observed a variety of cellular staining patterns , including ( a ) diffuse ( homogeneous ) staining of intracellular mucin , ( b ) speckled ( inhomogeneous ) staining of mucin droplets , ( c ) peripheral staining of intracellular droplets , ( d ) cytoplasmic staining of goblet cells , and ( e ) apical ( luminal ) surface staining .
C0007634
cellular
C0010834
cytoplasmic