Inhibition of cell proliferation and increase in apoptosis following fenretinide treatment.

<p>Excised tumors were fixed in formalin, paraffin embedded and sectioned. (<b>A</b>) H & E staining and immunohistochemical staining with anti-Ki67 antibody (proliferation marker) and anti-cleaved caspase -3 (apoptosis marker) of whole sections of tumor xenografts. (<b>B</b>) The images are at 100<i>μ</i>m.