Two sisters, age fifty-two and forty-seven, who lived together all their lives, developed an almost identical paranoid schizophrenia. Their delusions

were not only similar but were actually identically worded, regardless of whether the patients were together or separated. Separation of the patients brought about no change in their psychotic illness and since their relationship with each other was the only personal relationship they could maintain they were allowed to stay together in the psychiatric hospital. An interesting detail is the occurrence of identical peritonsillar abscess in both patients within is the occurrence of identical peritonsillar abscess in both patients within four days of each other while they were hospitalized in separate institutions.