SSTR5 and diffuse large B-cell lymphoma: SSTR3 and SSTR5 were negative in DLBCL, except for two suspicious cases where SSTR3 was positive in one DLBCL patient (no. 30) who had mild staining in only 5% of the malignant cells and another patient (no. 40) who had mildly positive SSTR5 IHC, but strong background staining suggested that it might be a false positive.