"The fourth edition has been revised with the same goals as the previous editions, that is, to provide "descriptive histopathology and differential diagnosis, critical analysis, balanced perspectives on what is known and what is not, clarity of writing, the use of tables to summarize the key features of major entities, and color photomicrographs" and also to maintain a rather uniform style"-- Provided by publisher.

Introduction to Microscopic Interpretation / Raymond L. Barnhill and Daniel M. Jones -- Spongiotic Dermatitis / Preeti Jhorar, Michael Murphy, and Jane M. Grant-Kels -- Interface Dermatitis / Jacqueline M. Junkins-Hopkins and Thomas D. Horn -- Psoriasiform Dermatitis / Isabella Fried, Raymond L. Barnhill -- Superficial and Deep Perivascular Dermatitis / A. Neil Crowson -- Nodular and Diffuse Cutaneous Infiltrates / Garrett Desman, Jeff D. Harvell, Raymond L. Barnhill -- Intraepidermal Vesiculopustular Diseases / Cynthia M. Magro, A. Neil Crowson, Terence J. Harrist -- Subepidermal Blistering Diseases / A. Neil Crowson and Cynthia M. Magro -- Vasculitis and Related Disorders / Sarah K. Barksdale and Raymond L. Barnhill -- Disorders of Cutaneous Appendages / Lynne J. Goldberg and Sarah K. Barksdale -- Panniculitis / Almut Boer-Auer, Raymond L. Barnhill, Birgitta Schmidt -- Cutaneous Drug Eruptions / A. Neil Crowson and Cynthia M. Magro -- Cutaneous Reactions to Exogenous Agents / A. Neil Crowson and Cynthia M. Magro -- Alterations of the Stratum Corneum and Epidermis / Michael W. Piepkorn -- Disorders of Pigmentation / A. Neil Crowson, Cynthia M. Magro, Anne Janin, and Raymond L. Barnhill -- Deposition Disorders / Franco Rongioletti, Raymond L. Barnhill -- Alterations of Collagen and Elastin / Garrett Desman and Raymond L. Barnhill -- Ectopic Tissue / Jacqueline M. Junkins-Hopkins -- Bacterial Infections / Ronald P. Rapini -- Treponemal and Rickettsial Diseases / A. Neil Crowson, Cynthia M. Magro, J. Stephen Dumler, and Raymond L. Barnhill -- Fungal Infections / Alexandre Alanio, Matthew W. McCarthy, Thomas J. Walsh, Raymond L. Barnhill, and Catherine Lisa Kauffman -- Viral Infections / Garrett Desman, Clay J. Cockerell, and James J. Lyons -- Protozoal and Algal Infections / Eileen Burd, Lars Westblade, and Paul Hofman -- Helminthic Diseases / Blaine A. Mathison, Raymond L. Barnhill -- Cutaneous Cysts and Related Lesions / Glynis A. Scott -- Tumors of the Epidermis / Alan S. Boyd -- Tumors of Melanocytes / Raymond L. Barnhill, Michael W. Piepkorn, Armita Bahrami, Artur Zembowicz, and Thomas Wiesner -- Tumors with Hair Follicle and Sebaceous Differentiation / Maxime Battistella, Mark R. Wick, Heinz Kutzner, Raymond L. Barnhill -- Sweat Gland Tumors / Maxime Battistella, Mark R. Wick, Heinz Kutzner, and Raymond L. Barnhill -- Fibrous and Fibrohistiocytic Tumors / Scott C. Bresler, Stefan Kraft, Jason L. Hornick, and Scott R. Granter -- Vascular Tumors and Vascular Malformations / Heinz Kutzner, Hansgeorg Muller, Michel Wassef, Steven J. Hunt, Daniel J. Santa Cruz, Raymond L. Barnhill -- Tumors of Adipose Tissue, Muscle, Cartilage, and Bone / Kristen M. Paral and Thomas Krausz -- Neural and Neuroendocrine Tumors / Zsolt B. Argenyi, Chris H. Jokinen -- Lymphoid, Leukemic, and Other Cellular Infiltrates / Werner Kempf, Guenter Burg, Cesare Massone, Lorenzo Cerroni, Melissa Pulitzer, A. Neil Crowson, and Cynthia M. Magro -- Cutaneous Metastases / Ghadah Al Sannaa, Alexander J. Lazar -- Disorders of the Nail Apparatus / Aldo Gonzalez-Serva, Raymond Barnhill -- Disorders of Oral Mucosa / Mark A. Lerman and Sook-Bin Woo -- Disorders of the Genital Mucosa / Russell A. Ball, Katherine M. Ball, Kelly L. West -- Conjunctival Tumors / Artur Zembowicz, Jakub Khzouz, Sarah E. Coupland, Nathalie Cassoux, Raymond Barnhill.