Computer-assisted CT measurements in late paraphrenics with and without Schneiderian first-rank symptoms: A preliminary report

Computer-assisted measurements were made on the computed tomography (CT) scans of 14 patients meeting ICD-9 diagnostic criteria for late paraphrenia, seven of whom had exhibited one or more first-rank symptoms during their illness. When the CT scans of all 14 late paraphrenics were compared with those of an age-matched healthy control group, there were no significant differences with regard to planimetric measurements of brain and ventricle areas. Comparison of the scans of late paraphrenics with first-rank symptoms and those without them demonstrated that late paraphrenics without first-rank symptoms had a greater degree of cerebral atrophy, which was significantly so for the left frontal lobe. The findings support the observation that late paraphrenia is a heterogeneous condition which is comprised of a group with first-rank symptoms who probably represent late-onset schizophrenia and a group without first-rank symptoms who have structural brain abnormalities and a presumed organic substrate for their symptoms that is impossible to exclude through clinical evaluation.