Book excerpt: Skin lymphomas are relatively rare. They may arise in the skin itself and as a by-product of HIV infection, or may arise elsewhere as a result of Hodgkin's disease, B cell lymphomas or leukaemia. Whatever the cause, they can easily be overlooked as psoriasis or dermatitis. Diagnosis of skin lymphoma is difficult and making the wrong diagnosis can prove fatal. Consequently, those in training in dermatology and pathology need to have a good understanding of the clinical presentations and the pathological correlates of this challenging disease. An Illustrated Guide to Skin Lymphoma is a beautiful full-colour illustrated text and atlas that combines pathology with clinical features and treatment. This second edition includes the latest classification systems for cutaneous lymphomas as well as brand new chapters and an expanded section on treatment.