PPL is a very rare entity accounting for only 3.6% of all extranodal lymphoma cases [2] . The predominant pathologic subtype in our study was MALT lymphoma, followed by DLBCL, confirming previous data [6, 7] . PET/ CT imaging is a highly sensitive and specific tool for detection and localization of HL and aggressive NHL, and it also superior to CT in differentiating immunophenotypes of lymphoma [5, [8] [9] [10] . PET scans may be able to reliably distinguish between indolent and aggressive subtypes in lymphoma patients. In our study, the mSUVs were much higher in DLBCL cases than MALT lymphoma cases. DLBCL in contrast to MALT lymphoma often shows aggressive growth, which may increase FDG uptake by the lesions. Further clinical trials are warranted to determine whether the effectiveness of PET/ CT in PPL depends on the histological subtype.