Vascular anomaly

Overview of vascular anomalies

Vascular anomalies are a group of disorders characterized by abnormal growth or formation of blood vessels. These anomalies can be broadly classified into two categories: vascular tumors and vascular malformations. Each type has distinct clinical features, management strategies, and prognoses.

Classification

Vascular anomalies are classified based on their biological behavior and clinical presentation. The two main categories are:

Vascular Tumors

Vascular tumors are characterized by endothelial cell proliferation. The most common type is the hemangioma, which typically appears in infancy and may resolve spontaneously over time. Other types include pyogenic granuloma and Kaposiform hemangioendothelioma.

Pyogenic granuloma on the thumb

Vascular Malformations

Vascular malformations are structural anomalies of blood vessels that are present at birth and grow proportionately with the child. They do not exhibit the rapid growth phase seen in vascular tumors. Vascular malformations are further classified based on the type of vessel involved:

• Capillary malformations: Commonly known as port-wine stains, these are flat, pink, or red marks that can occur anywhere on the body.
• Venous malformations: These are soft, compressible masses that can occur in any part of the body.
• Lymphatic malformations: These are caused by abnormal development of the lymphatic system and can lead to swelling and fluid accumulation.

Lymphangioma

• Arteriovenous malformations (AVMs): These involve abnormal connections between arteries and veins, bypassing the capillary system.

Diagnosis

The diagnosis of vascular anomalies typically involves a combination of clinical evaluation, imaging studies, and sometimes biopsy. Imaging techniques such as ultrasound, MRI, and CT scans are commonly used to assess the extent and nature of the anomaly.

Management

The management of vascular anomalies depends on the type and severity of the condition. Treatment options may include:

• Observation: Many vascular anomalies, especially hemangiomas, may not require treatment and can be monitored over time.
• Medical therapy: Medications such as beta-blockers (e.g., propranolol) are used to treat certain types of hemangiomas.
• Surgical intervention: Surgery may be necessary for large or symptomatic malformations.
• Laser therapy: Used primarily for capillary malformations to reduce discoloration.

Prognosis

The prognosis for individuals with vascular anomalies varies widely depending on the type and location of the anomaly. While some may resolve spontaneously, others may require ongoing management to prevent complications.

Related pages

• Hemangioma
• Lymphangioma
• Arteriovenous malformation
• Port-wine stain

Example of a vascular anomaly on the hand

See also

• Vascular disease
• Congenital disorder
• Angiogenesis