Sezary SyndromeMycosis FungoidesLymphoma, T-Cell, CutaneousDermatitis, ExfoliativeSkin NeoplasmsSyndromeReceptors, KIR3DL2Antigens, CD7Receptors, KIR2DL2PhotopheresisDipeptidyl Peptidase 4Lysosomal-Associated Membrane Protein 3Lymphatic DiseasesT-LymphocytesPUVA TherapyPentostatinImmunophenotypingPruritusSkinGene Rearrangement, beta-Chain T-Cell Antigen ReceptorLymphoma, T-CellFlow CytometryNeoplastic Cells, Circulating