The short isoform UT-B1 (lacking exon 3) is present in 55% of bladder tumors, while another 55% of bladder tumors exhibit an in—frame deletion of 24 nucleotides in exon 4 of UT-B1 (UT-B1Δ24) [25]. The gene discussed is SLC14A1; the disease is urinary bladder neoplasm.