ear Colleagues,The relationship between the mind and the body has long been widely recognizedin medicine. The notion of the primary cause of a condition is essential for defining theappropriate therapeutic approach. However, one symptom domainbe it psychologicalor somaticmay prevail over another, without necessarily indicating the cause of theproblem.Sometimes the various symptoms are so intricately linked that one problem willnot exist without the other, and will therefore be labeled psychosomatic. In this issue,we have aimed to summarize current knowledge in this field, propose explanatory mod-els, and give examples of somatic diseases with which psychiatric disorders are often asso-ciated. It is clear that there are many examples of such diseases, and the examples cov-ered here are far from exhaustive. However, we felt that it was important to address thisimportant field.The understanding of somatic illness and its consequences on the psychology ofthe individual should be useful in the diagnosis of a psychological disorder and the choiceof an appropriate treatment. Should we envisage symptomatic treatment or therapydirected at the etiopathogenesis? Will the treatment of caudal pancreatitis improve thehallucinatory syndrome observed in such cases? Will the treatment of Cushings syn-drome help the depression induced by adrenal hypercorticoidism?We hope that this review will fuel some of your own ideas.Yours sincerely,Jean-Paul Macher, MDMarc-Antoine Crocq, MDE d i t o r i a lD1 0 9