RISH analysis of HOXC4, HOXC5, and HOXC6 on a maltoma (a through d) and an immunocytoma (e through h). HOXC4 expression is shown in (a) and (e), HOXC5 in (b) and (f ), HOXC6 in (c) and (g), and sense control for HOXC5 in (d) and (h). Positive signals are shown as black DAB/Ni precipitates (a) or as black silver granules (e).