HMOX1 and kidney cancer: Our findings show that HO-1 expression is increased in tubular epithelium compared with infiltrating cells and is decreased in the epithelium when compared to that in HC, but no significant differences were observed between the biopsies of patients with LN and CC biopsies of patients with kidney cancer probably because although the examined tissue was not infiltrated by tumor, it was stressed tissue exposed to an antitumor immune response.