- NOTE: A copy of the pathology report is sufficient to register the patient to the trial; diagnosis of PTCL should have been based on identification in biopsy specimens of a peripheral T-cell lymphoma disorder characterized by positivity in the malignant cell population of at least 3 of the following T-cell markers: betaF1, cluster of differentiation (CD)2, CD3, CD4, CD5, CD7, CD8, and negativity of at least 2 of the following B-cell markers CD19, CD20, CD79alpha and paired box 5 (Pax-5); further, CD56 should be used for the diagnosis of the nasal type, while CD30, ALK-1 and Pax-5 (that should be negative) are required for the anaplastic type; CD10, chemokine (C-X-C motif) ligand 13 (CXCL13), programmed cell death (PD)-1 and CD21 are warranted for the diagnosis of angioimmunoblastic T-cell lymphoma along with Epstein-Barr virus-encoded small ribonucleic acid (RNA) (EBER) in situ hybridization; determination of mindbomb E3 ubiquitin protein ligase 1(Mib-1)/marker of proliferation Ki-67 (Ki-67) to be performed; finally, additional markers useful within the context of anaplastic large cell lymphoma, extranodal NK/T-cell lymphoma and subcutaneous panniculitis-like T-cell lymphoma are TIA1 cytotoxic granule-associated RNA binding protein (TIA-1), granzyme B and perforin; it is acknowledged that no marker has absolute lineage specificity, and that immunophenotypic studies should be performed with panels of monoclonal antibodies; final diagnoses containing caveats such as "suspicious of" or "presumably" are considered inadequate for a patient to be enrolled in the trial