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=Synonymer=
Back mouse (Peter Curtis, 1993), episacroiliac lipoma (E. Ries, 1937), lumbar fascial fat herniation (W. S. C. Copeman and W. L. Ackerman), iliac crest pain syndrome, multifidus triangle syndrome.

=Baggrund=
The term "back mouse" is a rather cute description for a very painful yet often overlooked problem, even by back pain specialists. Originally termed the "episacroiliac lipoma" by E. Ries in 1937,1 it was later labeled the "back mouse" by Peter Curtis in 1993.2

=x=
Subcutaneous lipomas are found all around the body, grow slowly over time and are only cosmetically important. The back mouse, though, is only found around the sacral region and is generally tender and at times painful. Also, the back mouse seems to suddenly appear following trauma to the back as in motor vehicle accidents or perhaps following a lifting injury.3 The size of the nodules does not change and they remain the same regardless of the administered soft tissue treatment, so they couldn't be muscular. But why would a lipoma be both tender and predictable in location?

=Link=
*[http://www.massagetherapy.com/articles/index.php/article_id/602/The-Problem-With-The-Back-Mouse- David Bond]

=Referencer=
1. Ries, E. Episacraliliac Lipoma. American Journal of Obstetrics and Gynecology. 1937, 34:490.

2. Curtis, Peter. In search of the "back mouse." Journal of Family Practitioners. 1993, Jun; 36(6): 657-9.

3. Copeman, W.S.C., and Ackerman, W.L. Edema or herniations of fat lobules as a cause of lumbar and gluteal "fibrositis." Archives of Internal Medicine. 79:22, 1947.

4. Copeman, W.S.C., and Ackerman, W.L. Fibrositis of the Back. Quarterly Journal of Medicine. 1944; 13:37-51.

5. Collee, G., Dijkmans, B.A.C., Vandenbroucke, J.P., Cats, A. Iliac crest pain syndrome in low back pain: Frequency and features. Journal of Rheumatology. 1991;18(7):1060-3.

6. Bauwens, P. and Coyer, A. The multifidis triangle syndrome as a cause of low back pain. British Medical Journal, Nov. 1955, 1306-7.

7. Singewald, M. Sacroiliac lipimata -- an often-unrecognized cause of low back pain. Bull. John Hopkins Hospital. 118:492-498, 1966.

8. Pace, J. Episacroiliac lipoma. American Family Physician. 1972, Sept., 70-3.