A patient with monosomy 7 and polyuria.

ABSTRACT

Diabetes insipidus (DI) is a rare complication of leukaemia. An association between monosomy 7 and DI in leukaemias has been proposed. We present a case of Ph1-positive CML who developed polyuria at the time of lymphoid blast transformation associated with loss of chromosome 7. Biochemical results were not diagnostic of DI and a therapeutic trial of DDAVP was unsuccessful. Post-mortem showed a peripituitary and renal leukaemic infiltrate and although DI is a possibility, the cause of his polyuria remains unresolved.