| Guyon's amputation | Amputation above the malleoli, a modification of Syme's amputation. (05 Mar 2000) |
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| Guyon's isthmus | An elongated constriction at the junction of the body and cervix of the uterus. Synonym: isthmus uteri, Guyon's isthmus, orificium internum uteri, os uteri internum, ostium uteri internum. (05 Mar 2000) |
| Guyon's sign | <clinical sign> Ballottement of the kidney in cases of nephroptosis, especially when there is also a renal tumour, the hypoglossal nerve lies directly upon the external carotid artery, whereby this vessel may be distinguished from the internal carotid when ligation is necessary. (05 Mar 2000) |
| Guyon, Felix | <person> French surgeon, 1831-1920. See: Guyon's amputation, Guyon's isthmus, Guyon's sign. (05 Mar 2000) |
| canal of Guyon | Passageway through the transverse carpal ligament by which the ulnar nerve and artery enter the palm; it is closely related to the pisiform and the hook of the hamate. (05 Mar 2000) |
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