Summary
We report a case with double superior gemellus and double piriformis mm. associated with the sciatic n. dividing high and passing between the two piriformis mm. in the same lower extremity. This abnormality has not previously been described in the literature. As many musculoskeletal structures may be involved in sciatica, the supernumerary superior gemelli and piriformis mm. may exert pressure on the sciatic n. and this should be taken into account by clinicians.
Résumé
Nous rapportons le cas de l'association de muscles jumeau supérieur et piriforme doubles à une division haute du n. sciatique. Ce nerf avait la particularité de passer entre les deux mm. piriformes. Cette anomalie n'a pas été signalée dans la littérature. De la même manière qu'un certain nombre de structures musculo-squelettiques sont susceptibles de provoquer une névralgie sciatique, la présence de mm. jumeau supérieur et piriforme surnuméraires est susceptible de comprimer le n. sciatique. Aussi cette anomalie doit-elle être connue des cliniciens.
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Arifoglu, Y., Sürücü, H.S., Sargon, M.F. et al. Double superior gemellus together with double piriformis and high division of the sciatic nerve. Surg Radiol Anat 19, 407–408 (1997). https://doi.org/10.1007/BF01628510
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DOI: https://doi.org/10.1007/BF01628510