This pregnant woman was evaluated for a rapidly growing tumor on her back. Closer view of this lesion demonstrates the typical appearance of a pyogenic granuloma. This is an arterial lesion characterized by a central punctum, which may pulsate, and radiate dilated branches. It may be congenital or acquired. Spider ectasias are especially common during pregnancy and with liver disease.
Treatment is usually unnecessary.
If desired, they can be blanched by light electrocoagulation of the central vessel. Here is a close view of a typical spider ectasia. Pressure on this lesion would demonstrate filling from the center. Multiple spider etasias such as these are usually associated with liver disease or pregnancy.