| cranial sinuses | Large endothelium-lined venous channels situated between the two layers of the dura mater; they are devoid of valves. (12 Dec 1998) |
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| pulmonary sinuses | The space at the origin of the pulmonary trunk between the dilated wall of the vessel and each cusp of the pulmonic valve. Synonym: sinus trunci pulmonalis. (05 Mar 2000) |
| septum of frontal sinuses | The bony partition between the right and left frontal sinuses; it is often deflected to one side of the middle line. Synonym: septum sinuum frontalium. (05 Mar 2000) |
| septum of sphenoidal sinuses | The bony partition between the two sphenoidal sinuses, often deflected to one side of the mid line. Synonym: septum sinuum sphenoidalium. (05 Mar 2000) |
| sinuses | Air filled cavities. Examples are the ethmoids, maxillary, frontal and sphenoid sinuses. (27 Sep 1997) |
| sinuses of dura mater | Endothelium-lined venous channels in the dura mater. Synonym: sinus durae matris, cerebral sinuses, cranial sinuses, sinuses of dura mater, venous sinuses. (05 Mar 2000) |
| dural venous sinuses | Endothelium-lined venous channels in the dura mater. Synonym: sinus durae matris, cerebral sinuses, cranial sinuses, sinuses of dura mater, venous sinuses. (05 Mar 2000) |
| intercavernous sinuses | The anterior and posterior anastomoses between the cavernous sinus's, passing anterior and posterior to the hypophysis and forming, with the cavernous sinuses, the circular sinus. Synonym: sinus intercavernosi, Ridley's sinus. Jugular sinus Sinus jugularis, one of three enlargements of the jugular veins; the external jugular sinus is between the two sets of valves; the internal jugular sinus's are at the origin (superior bulb) and near the termination (inferior bulb). (05 Mar 2000) |
| androgen resistance syndromes | A class of disorders associated with 5a-steroid reductase deficiency, testicular feminization, and related disorders. Compare: steroid 5a-reductase, Reifenstein's syndrome, infertile male syndrome, testicular feminization syndrome. (05 Mar 2000) |
| aortic arch syndromes | Any of a group of disorders leading to occlusion of the arteries arising from the aortic arch. Such occlusion may be caused by atherosclerosis, arterial embolism, syphilitic or tuberculous arteritis, etc. (12 Dec 1998) |
| malabsorption syndromes | General term for syndromes of malnutrition due to failure of normal intestinal absorption of nutrients. (12 Dec 1998) |
| paraneoplastic syndromes | In patients with neoplastic diseases a wide variety of clinical pictures which are indirect and usually remote effects produced by tumour cell metabolites or other products. (12 Dec 1998) |
| pathologic startle syndromes | A group of disorders characterised by markedly exaggerated startle reflex and other exaggerated stimulus-induced responses. Includes hyperexplexia and probably latah and the jumping Frenchman of Maine syndrome. (05 Mar 2000) |
| chromosomal instability syndromes | A group of mendelian conditions associated with chromosomal instability and breakage in vitro, they often manifest an increased tendency to certain types of malignancies. See: Bloom's syndrome, fragile X syndrome, xeroderma pigmentosum. (05 Mar 2000) |
| compartment syndromes | Conditions in which increased pressure within a limited space compromises the circulation and function of tissue within that space. Compartmentation involves mainly the leg but also involved are the forearm, arm, thigh, shoulder, and buttock. Some of the causes of increased pressure are trauma, tight dressings, haemorrhage, and exercise. Sequelae include nerve compression, paralysis, and contracture. (12 Dec 1998) |