Pediatric Imaging

What Is the Right Imaging to Screen for Hepatic Hemangiomas in an Infant?

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What Is the Right Imaging to Screen for Hepatic Hemangiomas in an Infant?

It’s a busy afternoon in your pediatric clinic. During a well-child visit for a 3-month-old, you note six small, bright-red papules on the infant’s trunk and back, consistent with cutaneous infantile hemangiomas. While these skin lesions are common and benign, the presence of multiple hemangiomas raises the clinical question of visceral involvement, particularly in the liver. You need to decide on the most appropriate initial imaging study to screen for infantile hepatic hemangiomas (IHH). This article provides a clinical workflow for this specific scenario, explaining why the American College of Radiology (ACR) rates US abdomen as Usually Appropriate.

Who Fits This Clinical Scenario?

This guidance applies to a specific patient population: an infant presenting with multiple cutaneous infantile hemangiomas (IH), where the clinical goal is to screen for asymptomatic infantile hepatic hemangiomas. The generally accepted threshold for screening is the presence of five or more cutaneous IHs, as this finding is associated with a higher risk of visceral lesions.

This workflow is intended for initial, first-line imaging in an otherwise asymptomatic infant.

This article does NOT apply to:

  • An infant with a single cutaneous hemangioma: In the absence of other risk factors (e.g., a very large facial “segmental” hemangioma), screening for visceral lesions is typically not indicated. That presentation falls under the ACR variant Infant. Clinical signs or symptoms of infantile hemangioma. Initial imaging.
  • A child with a vascular lesion that does not appear to be an infantile hemangioma: Presentations suggesting other vascular anomalies, such as a port-wine stain (capillary malformation) or a soft, compressible bluish mass (venous malformation), require a different diagnostic approach. These are covered in the variant Child. Clinical signs or symptoms of vascular anomaly (tumor or malformation) not suggesting infantile hemangioma.
  • An infant with known hepatic hemangiomas and new symptoms: If a diagnosis is already established and the patient develops new signs like hepatomegaly, abdominal distension, or signs of heart failure, the imaging strategy shifts from screening to problem-solving.

What Diagnoses Are You Working Up in This Scenario?

When ordering screening imaging for an infant with multiple cutaneous hemangiomas, the primary goal is to detect or exclude specific conditions within the liver. The differential diagnosis guides the choice of imaging modality.

Infantile Hepatic Hemangiomas (IHH)
This is the principal diagnosis of concern. IHH are the most common benign hepatic tumors of infancy and are strongly associated with multiple cutaneous hemangiomas. They can be classified as focal, multifocal, or diffuse. The multifocal and diffuse forms are most common in this clinical setting. While many are small and asymptomatic, larger or numerous lesions can cause significant arteriovenous or portovenous shunting, leading to high-output cardiac failure, hepatomegaly, and hypothyroidism (due to iodine consumption by the tumor). Identifying these lesions before they cause symptoms is the main purpose of screening.

Hepatoblastoma
Though rare, hepatoblastoma is the most common primary malignant liver tumor in early childhood. It is a critical, albeit less likely, consideration for a solid liver mass in an infant. Imaging characteristics on ultrasound, such as calcifications, heterogeneous echotexture, and different vascular patterns on Doppler, can often help distinguish it from a typical hemangioma, prompting further investigation.

Other Rare Hepatic Lesions
Other possibilities in this age group include mesenchymal hamartoma or, very rarely, metastatic disease from a tumor like neuroblastoma. These are not the primary targets of screening but represent important “can’t-miss” diagnoses that ultrasound can help differentiate or raise suspicion for.

Normal Liver
The most frequent and desired outcome of screening is a normal study. A negative ultrasound provides significant reassurance, allowing the clinical focus to remain on the management and expected involution of the cutaneous lesions.

Why Is US abdomen the Recommended Study for This Presentation?

The ACR Appropriateness Criteria rate US abdomen and US duplex Doppler abdomen as Usually Appropriate for screening an infant with multiple cutaneous hemangiomas. This recommendation is based on the modality’s excellent balance of diagnostic capability, safety, and practicality in the pediatric population.

The primary advantage of ultrasound is its complete lack of ionizing radiation (pediatric relative radiation level: O 0 mSv). This is a paramount consideration in infants, adhering to the As Low As Reasonably Achievable (ALARA) principle. Ultrasound is also highly accessible, relatively low-cost, and can be performed without sedation, which is a major benefit in this age group. It is highly sensitive for detecting solid and cystic lesions within the liver parenchyma.

Adding duplex Doppler is essential. It is also rated Usually Appropriate and should be considered part of the standard evaluation. Doppler imaging assesses blood flow within any identified lesion, which is critical for the differential diagnosis. Infantile hemangiomas are typically high-flow lesions, and Doppler helps characterize this vascularity, differentiate them from other tumors, and identify any significant shunting that could lead to systemic complications.

Why are other imaging modalities not recommended for initial screening?

  • MRI abdomen without and with IV contrast: This is rated Usually not appropriate for initial screening. While MRI offers superior soft tissue contrast and detailed characterization, it typically requires general anesthesia or deep sedation in an infant to prevent motion artifact. This introduces risks and complexity that are not justified for a screening examination. MRI is reserved as a second-line, problem-solving tool if ultrasound findings are indeterminate or concerning.
  • CT abdomen with IV contrast: This is also rated Usually not appropriate. The primary reason is the significant ionizing radiation dose (pediatric RRL: ☢☢☢☢ 3-10 mSv). Exposing an infant to this level of radiation for a screening purpose is contrary to best practices when a non-radiation alternative like ultrasound is highly effective. CT is generally reserved for urgent situations or when MRI is contraindicated.

In practice, the order should specify an abdominal ultrasound with attention to the liver, including Doppler evaluation of any detected masses.

What’s Next After US abdomen? Downstream Workflow

The results of the screening ultrasound will dictate the subsequent clinical pathway. The decision tree is generally straightforward.

If the Ultrasound is Negative:
A normal liver ultrasound is a reassuring finding. No further imaging is indicated for screening purposes. The clinical management plan can focus on monitoring the cutaneous hemangiomas, which typically involute over time. The family can be counseled that the risk of clinically significant internal lesions is very low.

If the Ultrasound is Positive for Infantile Hepatic Hemangiomas:
The next steps depend on the number, size, and hemodynamic impact of the lesions.

  • Small, asymptomatic multifocal IHH: These are often managed with a “watch-and-wait” approach. Serial ultrasounds are performed (e.g., every 1-2 months initially) to monitor for growth or regression. A baseline pediatric cardiology evaluation, including an echocardiogram, may be considered to assess for early signs of cardiac strain.
  • Large, numerous, or diffuse IHH: If the lesions are causing hepatomegaly, if there is evidence of significant shunting on Doppler, or if the infant has any related symptoms, this triggers more active management. The infant should be referred to a multidisciplinary vascular anomalies team, which may include pediatric dermatology, hepatology, interventional radiology, and cardiology. Medical therapy, most commonly with oral propranolol, is often initiated to halt growth and promote regression of the hemangiomas.

If the Ultrasound is Indeterminate or Atypical:
If a liver lesion does not have the classic appearance of a hemangioma, further characterization is necessary. The next step is typically an MRI of the abdomen without and with IV contrast. Although rated Usually not appropriate for initial screening, it becomes the modality of choice for problem-solving an indeterminate finding from a prior study.

Pitfalls to Avoid (and When to Get Help)

When managing an infant with multiple cutaneous hemangiomas, several common pitfalls can compromise the diagnostic workflow.

  • Failing to screen: The most significant pitfall is not recognizing that five or more cutaneous hemangiomas is an indication for visceral screening, potentially missing an opportunity to detect and manage clinically significant hepatic lesions.
  • Omitting Doppler evaluation: A grayscale ultrasound alone is insufficient. Ordering a “US abdomen” without specifying the need for Doppler interrogation of any lesions can miss crucial hemodynamic information needed for diagnosis and risk stratification.
  • Inappropriate use of CT or MRI: Jumping directly to advanced imaging for screening exposes the infant to unnecessary radiation (CT) or sedation risks (MRI). Ultrasound should always be the first step.
  • Ignoring subtle signs of cardiac strain: Pay close attention to the infant’s clinical status, including feeding tolerance, respiratory rate, and heart rate. If the ultrasound report mentions dilated hepatic veins or cardiomegaly is suspected, this is a red flag.

Escalation: If an infant with known or suspected hepatic hemangiomas develops tachypnea, tachycardia, poor feeding, or a new heart murmur, escalate immediately for a pediatric cardiology consultation and echocardiogram to evaluate for high-output cardiac failure.

Related ACR Topics and Tools

This article covers one specific scenario. For a comprehensive overview of imaging for pediatric vascular anomalies and for tools to help with ordering, consult the following resources.

Frequently Asked Questions

What is the exact number of cutaneous hemangiomas that triggers screening for hepatic hemangiomas?

While there is some variability in the literature, the most commonly cited threshold is the presence of five or more cutaneous infantile hemangiomas. This number is associated with a significantly increased risk of having concurrent infantile hepatic hemangiomas, making screening with an abdominal ultrasound a reasonable step.

If the screening ultrasound is negative, does my patient need any follow-up imaging?

No. If a high-quality screening abdominal ultrasound is negative for hepatic lesions in an asymptomatic infant, no further screening imaging is recommended. The management should then focus on the clinical monitoring of the cutaneous hemangiomas.

Why is MRI not the first choice if it provides more detailed images than ultrasound?

MRI is rated ‘Usually not appropriate’ for initial screening primarily because it requires the infant to be perfectly still, which necessitates deep sedation or general anesthesia. The associated risks, cost, and logistical complexity are not justified for a screening test when a non-invasive, sedation-free, and highly effective alternative like ultrasound is available. MRI is reserved for cases where ultrasound findings are unclear or suspicious for a different diagnosis.

Does a single, large ‘segmental’ hemangioma also require a screening abdominal ultrasound?

Yes, often it does, but it falls under a slightly different clinical consideration. Large segmental hemangiomas, particularly on the face or lumbosacral region, are associated with specific syndromes (PHACE and LUMBAR/SACRAL, respectively) that can include visceral abnormalities. While this article focuses on multiple small hemangiomas, a large segmental lesion is also a strong indication for screening imaging, which would similarly start with an ultrasound.

If hepatic hemangiomas are found, will my patient need surgery?

Surgery is very rarely required for infantile hepatic hemangiomas. The vast majority either regress on their own without treatment or respond very well to medical therapy, such as oral propranolol. Surgical intervention or embolization by interventional radiology is reserved for rare, complex cases with life-threatening complications that do not respond to medication.

Reviewed by Pouyan Golshani, MD, Interventional Radiologist — May 30, 2026