Onset of schizophrenia at 100 years of age

Although generally regarded as a disease of young adults, schizophrenia does occur in older ages. Doubts have been raised about the validity of diagnosing schizophrenia in very old age. We have described herein a rare and unique case of a woman who had onset of "schizophrenia" as per ICD-10 and DSM-IV-TR criteria at the age of 100 years. We have discussed about the validity of diagnosing schizophrenia in older age.