Strawberry naevus. A strawberry naevus (cavernous haemangioma or strawberry mark) on the arm of a 6- month-old baby boy. This bright red, raised birthmark is caused by an abnormal distribution of blood vessels. Strawberry marks usually enlarge rapidly during the first few weeks after birth, causing distress but doing little harm. After the age of about six months the lump subsides. About 50% have disappeared by age five and 90% by age nine. Strawberry marks that cause problems, such as persistent bleeding or distress, can be removed by freezing or laser treatment.
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