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Editor's Correspondence |

Delirium as a Predictor of Survival in Older Patients With Advanced Cancer—Reply

Peter G. Lawlor, MB; Bruno Gagnon, MD; Isabelle L. Mancini, MD; Jose L. Pereira, MB; John Hanson, MSc; Maria Suarez-Alamazor, MD, PhD; Eduardo D. Bruera, MD
Arch Intern Med. 2000;160(18):2866-2868. doi:.
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We appreciate the comments of Dr Zeimer, who correctly notes our failure to mention limbic encephalitis as a rare cause of delirium and the possible contribution of this cause to the nonreversibility of delirium in our study.1 Limbic encephalitis is regarded as a specific type of paraneoplastic encephalomyelitis.2 Both paraneoplastic encephalomyelitis and sensory neuropathy are associated with the presence of anti-Hu antibodies, and in one series, the neurological presentation predated the cancer diagnosis in up to 60% of patients.3 Our study design stipulated the conduct of laboratory and other investigations that were part of routine practice in our palliative care unit. This excluded measurement of anti-Hu antibodies.

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