. Overall goals and objectives, as well as procedures for consensus development, were based on the Canadian Medical Association guidelines for clinical practice guidelines, 1 a s described in the summary article by Patterson et al. 2 In this paper we present general information about the association between depression and dementia, then summarize various clinical presentations in dementia that have prominent depressive features, review diagnostic difficulties and lastly summarize treatment of depressive disorder in dementia in more detail, culminating in the main consensus conference recommendations.An initial Medline search was performed prior to the ABSTRACT: Background: Depressive syndromes in dementia are common, treatment is challenging and controlled intervention studies are small in number. The goal of this paper is to review known information about the etiology, epidemiology and treatment of these syndromes, as summarized at the recent Canadian Consensus Conference on Dementia. Methods: A number of Medline searches were performed (most recently updated in October 2000) using the subject categories dementia and depression, or apathy or emotional lability and other relevant articles were also reviewed. The background article was edited and amended at the Consensus Conference on Dementia. Final recommendations appearing in the summary article by Patterson et al were accepted by the group consensus process. Clinical discussion and informational updates were added for the current text by the authors. Results: Depressive syndromes, ranging in severity from isolated symptoms to full depressive disorders, increase in dementia. While clear-cut depressive disorder is increased in this population, sub-syndromal disorders are even more common and cause considerable distress. Antidepressant treatment may improve the quality of life in depressed, demented people, although it is less successful than in those without cognitive impairment and carries more risk of iatrogenic effects. Conclusions: Physicians should be alert to the presence of depressive syndromes in dementia. Depressive illness should be treated and, when necessary, referral should be made to an appropriate specialist. Treatment must minimize iatrogenic effects. Although there is some support for treatment of syndromes that do not meet criteria for depressive disorder or dysthymia, the first line of intervention in these situations should involve nonpharmacological approaches.RÉSUMÉ: Syndromes dépressifs dans la démence. Introduction: Les syndromes dépressifs sont fréquents dans la démence, leur traitement est un défi et il existe peu d'études d'intervention contrôlées. Le but de cet article était de revoir les connaissances sur l'étiologie, l'épidémiologie et le traitement de ces syndromes, conformément au résumé fait à la Conférence canadienne de consensus sur la démence. Méthodes: Des recherches dans Medline ont été effectuées (avec mise à jour en octobre 2000) utilisant la démence et la dépression comme catégorie de sujet ou l'apathie ou la labilité ...