In an adult with a small left parietal subgaleal scalp hematoma on CT head and a normal baseline neurological exam, can they be discharged from the emergency department?

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Last updated: August 9, 2026 • View editorial policy

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Can You Discharge This Patient from the Emergency Department?

Yes, you can safely discharge an adult patient with a small subgaleal scalp hematoma and normal neurological examination from the emergency department, as subgaleal hematomas are superficial collections outside the skull that do not indicate intracranial injury when the CT head is otherwise normal.

Key Clinical Reasoning

A subgaleal hematoma is a collection of blood between the galea aponeurotica and the periosteum of the skull—it is external to the skull and does not represent intracranial pathology. The critical question is not about the subgaleal hematoma itself, but whether there is any associated intracranial injury on the CT scan.

What You Need to Verify Before Discharge:

  • CT findings: Confirm the CT shows ONLY the subgaleal hematoma with no intracranial abnormalities (no subdural, epidural, subarachnoid hemorrhage, contusions, or skull fractures)
  • Neurological examination: Must be completely normal (GCS 15, no focal deficits, no signs of basilar skull fracture)
  • No anticoagulation: Patient is not on warfarin, NOACs, or antiplatelet agents (see below for special considerations)
  • Reliable follow-up: Patient has someone at home to monitor them and can return if symptoms develop

Evidence-Based Discharge Criteria

According to the 2023 ACEP Clinical Policy 1, patients with minor head injury can be safely discharged when they meet specific low-risk criteria. While the guideline focuses on whether to obtain imaging initially, the principles apply to discharge decisions after imaging.

Safe discharge requires:

  • GCS score of 15
  • No neurological deficits (except amnesia is acceptable)
  • No signs of intoxication
  • No evidence of basilar or linear skull fracture 2

Critical Caveat About "Normal" Neurological Exams

One important study found that significant intracranial injury cannot be completely excluded even with GCS 15 and normal neurological examination 3. In their series, 2 of 3 patients with acute intracranial injury requiring intervention had normal neurological exams. This underscores why the CT scan result is paramount—not just the clinical exam.

Special Considerations for Anticoagulated Patients

If your patient is on anticoagulants or antiplatelet agents, the decision becomes more complex:

The 2023 ACEP guideline 1 specifically addresses this scenario. For patients on warfarin or NOACs with minor head injury and normal initial CT:

  • Delayed intracranial hemorrhage occurs in approximately 0.6-4.5% of cases 1
  • Most delayed hemorrhages do not require neurosurgical intervention 1
  • However, deaths have occurred (0.6% in one large study) 1

For anticoagulated patients with normal CT and normal neuro exam:

  • The evidence is mixed on whether single CT is sufficient
  • Many protocols recommend 24-hour observation with repeat CT before discharge 1
  • Some studies showed safe discharge without observation in select cases 1
  • Err on the side of caution: Consider observation or repeat imaging at 12-24 hours for anticoagulated patients

Note: The guideline evidence does not adequately address concomitant aspirin use, so extra caution is warranted in those patients 1.

Discharge Instructions

Provide clear head injury precautions:

  • Return immediately for worsening headache, vomiting, confusion, weakness, seizures, or difficulty waking
  • Avoid contact sports and activities with fall risk until cleared
  • Follow up with primary care in 24-48 hours
  • The subgaleal hematoma itself will gradually resorb over days to weeks and requires no specific treatment

Common Pitfalls to Avoid

  1. Don't confuse subgaleal with subdural: Subgaleal is external to the skull; subdural is intracranial and requires different management
  2. Don't discharge based on exam alone: Even with normal neurological findings, significant intracranial injury can be present 3
  3. Don't miss skull fractures: Carefully review the CT for any fracture lines, as their presence changes risk stratification 2
  4. Don't forget social factors: Ensure reliable home monitoring is available

The subgaleal hematoma itself is benign and does not require admission or specific treatment 4, 5. Your discharge decision hinges entirely on excluding significant intracranial injury and ensuring appropriate follow-up safety nets are in place.

References

2
Research

Can patients with minor head injuries be safely discharged home?

Archives of surgery (Chicago, Ill. : 1960), 1993

4
Research

Overcoming refractory subgaleal hematoma with endovascular treatment: A novel therapeutic approach.

Journal of cerebrovascular and endovascular neurosurgery, 2025

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.