1 Introduction.- 2 Methods and Criteria for Identification of Cells Occurring in Lymphomas and Related Diseases of the Skin.- 3 Morphology of Cells.- 4 Enzyme Cytochemistry: Diagnostically Relevant Facts.- 5 Demonstration of Immunologic Markers for the Identification of Lymphoid Cells in Cutaneous Infiltrates.- 6 Patterns of Cellular Infiltrates in Cutaneous Lymphomas.- 7 Classifications of Malignant Non-Hodgkin's Lymphomas.- Preliminary Remarks on the Following Chapters.- 8 Small Lymphoid Cell Lymphomas with Band-like T Cell Pattern (Mycosis Fungoides Type).- 9 Small and Mixed Small and Large Lymphoid Cell Lymphomas with Nodular B Cell Pattern (Reticulosis Type).- 10 Large Lymphoid Cell Lymphomas with Diffuse Non-B, Non-T Cell Pattern (Reticulo- and Lymphosarcoma Type).- 11 Cutaneous Manifestations of Burkitt's Lymphoma.- 12 Cutaneous Manifestations of Hodgkin's Disease.- 13 Leukemic Lymphomas/Leukemias.- 14 Diseases of the Mononuclear-Phagocyte System: Tumors and Tumor-Like Disorders.- 15 Cutaneous Pseudolymphomas.- 16 Miscellaneous Diseases Clinically Resembling or Related to Cutaneous Lymphomas or Pseudolymphomas.- References.