Fig. 2.

(a) Hematoxylin–Eosin stained section from gallbladder wall showing diffuse infiltrates of mononuclear cells with irregular nuclei and some with prominent nucleoli. Scattered lymphocytes, plasma cells and macrophages are also present. (b) The majority of cells stain positive for CD68 KP-1 epitope, which is positive not only in macrophages but also in myeloid and monocytic precursors.⁸ (c) Only rare cells stained positive for CD68-R PGM-1 epitope, which is more macrophage specific.⁹