Elevated Arylsulfatase B activity was detected in 71% of 24-h urine samples from 243 patients with colorectal cancer [164], but in studies of arylsulfatase in lung, liver, and kidney, the assay used did not distinguish ARSB from ARSA or ARSC (steroid sulfatase) [167]. The gene discussed is ARSB; the disease is colorectal cancer.