Recurrent pneumonia in children — short-answer question

Part A — Definition, classification and causes (10 marks)

a) Define recurrent pneumonia and distinguish it from persistent pneumonia (3 marks)

Recurrent pneumonia is two or more episodes of pneumonia within a single year, or three or more episodes at any time, with each episode radiographically confirmed and, critically, with the chest film returning to normal between episodes. This interval clearing distinguishes it from persistent or non-resolving pneumonia, in which a single opacity never clears. Recurrent pneumonia is treated as a symptom of an underlying cause rather than a diagnosis in itself. ^[1]

b) State the single most useful classifying question and explain it (4 marks)

The pivotal question is whether the pneumonia recurs at the same anatomical site or at different sites. Same-site recurrence points to a fixed structural or localised problem in that part of the lung, whereas recurrence at varying or multiple sites points to a systemic failure of airway defence. This one distinction sorts the differential into two manageable halves and directs whether the child needs structural imaging or a host work-up. ^[1]

c) Given this child's same-site pattern, list the causes you would consider (3 marks)

Because all three episodes involved the right middle lobe, I would consider structural and localised causes: right middle lobe syndrome, an inhaled foreign body, a congenital lung malformation such as a congenital pulmonary airway malformation or sequestration, extrinsic bronchial compression by a lymph node or tuberculosis, an endobronchial lesion, and localised bronchiectasis. In a young child, an unwitnessed inhaled foreign body must be actively excluded. ^{[2] [3]}