Commentary

Walter has pneumonia and kidney injury, both plausible contributors to delirium. He also has a change that is not adequately explained by those findings: progressive gait difficulty before the acute infection, anticoagulant exposure and subtle new asymmetry. Collateral history adds a minor fall several weeks earlier. These findings prompt urgent imaging while the systemic illness is treated.

The scan identifies a subdural haematoma. Pneumonia remains a concurrent diagnosis; both conditions can contribute, and urgent neurosurgical assessment proceeds alongside treatment of the medical illness. Anticoagulant management is handled by the relevant teams according to the intracranial bleeding and intervention plan; the comic does not give a generic reversal instruction.

Erdogan and colleagues reported a patient with several competing causes and a clinically important subdural collection [S07]. The composite includes structural and systemic illness, but changes the biography, history and course. Temple's report reinforces the need to reassess when neurological findings change, even after one explanation has been found [S31].

Following drainage, Walter becomes more alert and the weakness improves, but attention and daily function recover more slowly. Discussion can focus on which findings triggered imaging, how history obtained from relatives altered the assessment, and why improvement after a procedure still requires continued delirium care and rehabilitation.

An anonymised composite case that does not describe one identifiable person and is not research evidence.