Pivotal, Clinical Study for the Accuracy Evaluation of the IdentiClone Dx TRG Assay

Inclusion Criteria: 1. De-identified, residual FFPE specimens with a minimum of 8 curls 2. Subject Age ≥ 18 3. For suspected clonal positive specimens, FFPE specimens of subjects diagnosed (at the time the specimen was drawn) with T-cell Lymphoproliferative disease with at least one of the following: 1. ICD10 Codes: C84, C85.8, C85.9, C86.1, C86.2, C86.3, C86.5, 86.6, C91.5, C91.6, C91.0, C91.z, C91.9, C94, C95, C96, or other T-cell lymphoma diagnosis 2. b. T-cell lymphoproliferative disease diagnosis per collection site procedure (e.g., SNOMED) 3. Mycosis fungoides or Sézary syndrome sample are acceptable 4. For suspected clonal negative specimens, FFPE specimens of subjects suspected of T-cell lymphoproliferative disease but diagnosed negative for T-cell lymphoproliferative disease. Up to 20% of the negative specimens may be from normal tissue or tissue diagnosed with diseases other than T-cell lymphoproliferative disease Exclusion Criteria: 1.FFPE specimens that were fixed using formalin substitute (ethanol, methanol, etc.)