Hereditary nephritis associated with hematologic abnormalities seems to be an exceptional occurrence. We have observed a family in which nephritis was combined with May-Hegglin anomaly. A girl and her father suffered from proteinuria; a paternal uncle received a kidney graft; a paternal grand aunt died on periodic hemodialysis. The girl, the father and the uncle presented macrothrombocytopenia (40–100 × 10<sup>9</sup>/l, size 4–8 µm) with prolonged bleeding time (which precluded renal biopsy) and cytoplasmic inclusions in neutrophils (Döhle bodies). These hematologic abnormalities characterize the May-Hegglin anomaly. This kind of association has not been reported on so far.