Diagnosis of Head Injury Patient Symptoms

Clinical Presentation Analysis

The patient presents with a combination of key factors:

• Age: 70 years old (elderly patients are more susceptible).
• Medication: On anticoagulants (increases risk of bleeding).
• Trauma: Minor head injury (often sufficient for slow bleeds in this population).
• Symptom Onset: Delayed by one month.
• Symptoms: Severe headache, slowly developing neurological signs.

Differential Diagnosis Reasoning

Let's evaluate the options based on the presentation:

• Extradural haematoma: Typically associated with significant trauma and rapid symptom onset (hours to days) due to arterial bleeding. This doesn't fit the one-month delay.
• Acute subdural haematoma: Usually follows moderate to severe trauma, with symptoms developing within hours to days. This is inconsistent with the slow, delayed onset.
• Chronic subdural haematoma: This diagnosis strongly correlates with the patient's profile. Minor trauma, especially in the elderly or those on anticoagulants, can lead to slow venous bleeding. The hematoma gradually expands over weeks to months, causing symptoms like headache and progressive neurological deficits. The one-month delay is characteristic.
• Subarachnoid haemorrhage: Typically presents with a sudden, severe ("thunderclap") headache, not a slowly developing one over a month.

Conclusion

The classic presentation of a minor head injury in an elderly patient on anticoagulants, followed by a month-long delay before the onset of headache and slowly progressive neurological signs, is highly suggestive of a Chronic subdural haematoma.