Background: The major problem of eosinophilic pustular folliculitis (E
PF) is its generally unknown aetiology. Objective and methods: The pur
pose of this case report is to advise a thorough medical investigation
of all patients with EPF. Results: The case of EPF presented seems to
be associated with a chronic B-cell lymphatic leukaemia. Conclusion:
Before regarding EPF as an idiopathic disease of unknown aetiology a t
horough immunologic and haematologic investigation has to be advocated
.