Overlapping results were recorded between UALCAN and Oncomine platforms except for HSPA1A, HSPA1L, HSPA2, DNAJA4, DNAJB2, DNAJC4, DNAJC11, DNAJC21 and GAK found up-regulated in breast cancer but collectively down-regulated in the other tumors, and DNAJC8, DNAJC24, SACS and HSPB6 down-regulated in breast cancer and collectively up-regulated in other tumors. The gene discussed is DNAJC21; the disease is breast cancer.