Pseudotumour of the lung is a rare chest x-ray finding
among patients who present with fluid overload. It is caused
by loculated pleural effusion in the lung fissures.
Unfortunately, the occurrence of pseudotumour can be
misleading and sometimes can lead to unnecessary
investigation and emotional stress to the patient. We present
here a case of a 61-year-old gentleman with a known history
of hypertension, diabetes mellitus and dyslipidemia who
presented at University Malaya Medical Centre with
symptoms of fluid overload and a right middle lobe mass on
chest x-ray. The right middle lobe mass disappeared entirely
after being treated with aggressive diuretic therapy. A
diagnosis of pseudotumour was made and described in this
case report.