Prognosis
For most patients, a haemangioma follows a predictable, uncomplicated pattern of growth followed by slow involution lasting 1 to 8 years.[2] Intense proliferative growth is complete by 5 months of age in 80% of patients with haemangioma. By 9 months of age, overall growth is almost always complete. A small subset (3%) may experience continued growth for about another month. In a small study, 23 patients whose infantile haemangioma exhibited a prolonged growth phase were characterised. Growth continued for a mean age of 17 months. All the infantile haemangiomas had a deep component and a segmental or indeterminate morphology. In addition, 39% involved the parotid gland.[72] Deep haemangioma typically presents later. Involution usually begins at 1 year of age and 90% of involution is complete by 4 years of age.[1][3]
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