Sacral Intraspinal Lipoma Associated with Congenital Iliac Anomaly

Abstract

2 cases of a peculiar unilateral protuberance near the iliac bone with intraspinal abnormalities are reported. 8 cases have been described in the literature with this characteristic congenital association; they indicate the frequency of an occult spinal dysraphism which must be proved by myelography. In each case, surgical treatment of bone abnormality or of intraspinal lesions, or of both, should be discussed.

Lumbosacral lipomyelomeningocele with anomalous osseous limb in a 3-month-old female

“…Similar anomalous findings have been reported previously by Lee et al and Wasnik et al ( 4 , 5 ). Wasnik et al described the appendage as a “rudimentary accessory limb,” while Lee et al argued that because of the absence of limb structures such as muscle, long bones, and digits, a more accurate moniker would be “anomalous bone associated with spinal dysraphism.” A number of similar cases have been previously described since 1975 ( 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ).…”

Spinal lipoma as a dysembryogenetic anomaly: Four unusual cases of ectopic iliac rib within the spinal lipoma

“…It was described as a bony protuberance situated between the iliac bone and the sacrum, extending downward to the level of the junction between the ilium and the ischium. Afterward, the same anomaly was identified in only a few patients with lipomas and NTDs (Theander, ; Carter et al, ; McAlister et al, ; Cohen et al, ).…”

“…Occasionally, single cases of an ectopic digit (Snelling et al, 2008), a rudimentary scapula or pelvis (Sauer and Ozonoff, 1985), a thigh (Gamanagatti et al, 2003), or a more developed limb (Krishna and Lal, 1999) have been found in patients carrying spinal lipomas and other neural tube defects (NTDs). Intriguingly, a specific bony protuberance arising from the ilium near the sacroiliac joint and extending caudally to the level of the ilio-ischial junction has been described in few patients with spinal lipoma and NTDs (Lester and McAlister, 1970;Theander, 1975;McAlister et al, 1978;Cohen et al, 1981).…”