Among the conditions that can have the effect of causing an overgrowth of an extremity during the growing period of life may be mentioned chronic osteomyelitis and abnormal arteriovenous communications. This effect is apparently due to an abnormal increase of the arterial blood supply.
An increased length of the limb resulting from abnormal arteriovenous communications has been reported by Giraldes,1 Cordonnier,2 Davis,3 Hewett,4 Franz5 and Reid.6 In four of the cases reported by these authors the etiology of the condition was trauma, while in two cases it was congenital. In a congenital case,6 in a woman, aged 36, the affected leg was 6 cm. longer than the normal leg.
These cases have been reported under the various titles of abnormal arteriovenous communications, arteriovenous aneurysm, cirsoid aneurysm, racemose aneurysm and pulsating angioma. In all instances the cause has been abnormal communications between the arteries
Reid MR, Conway HG. CONGENITAL CIRSOID ANEURYSM OF THE LEG. JAMA. 1933;101(18):1391–1393. doi:10.1001/jama.1933.27430430001012