| haemorrhoids, external | Haemorrhoids that occur below the dentate line and are generally painless. They are sometimes called skin tags, or can be seen or felt as extra skin around the anus. External haemorrhoids can become very distressing when the blood in the external haemorrhoid clots and inflammation irritates the nearby pain-sensitive skin. This condition is called a thrombosed external haemorrhoid and is quite painful. (07 Jan 1998) |
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| haemorrhoids, internal | Haemorrhoids that occur above the dentate line in the anal canal which separates two types of anal skin. The skin above the dentate line is not sensitive to pain. Internal haemorrhoids, being above the dentate line, are therefore usually painless. They can cause bleeding or they may push out of (prolapse) the anal opening when they become quite large. (07 Jan 1998) |
| haemosalpinx | Collection of blood in a tube, often associated with a tubal pregnancy. Synonym: haemosalpinx. Origin: haemato-+ G. Salpinx, a trumpet (05 Mar 2000) |
| haemoscope | <instrument, physiology> An instrument devised by Hermann, for regulating and measuring the thickness of a layer of blood for spectroscopic examination. Source: Websters Dictionary (01 Mar 1998) |
| haemosialemesis | Vomiting of blood and saliva. Origin: haemo-+ G. Sialon, saliva, + emesis, vomiting (05 Mar 2000) |
| haemosiderin | <protein> A mammalian iron storage protein related to ferritin but less abundant. (18 Nov 1997) |
| haemosiderosis | Conditions in which there is a generalised increase in the iron stores of body tissues, particularly of liver and the reticuloendothelial system, without demonstrable tissue damage. The name refers to the presence of stainable iron in the tissue in the form of haemosiderin. (12 Dec 1998) |
| haemosiderosis / haemochromatosis | <radiology> Iron deposition due to abnormal metabolism or iron overload, primary abnormal iron metabolism, secondary alcoholic cirrhosis, multiple blood transfusions (e.g., Hb SS, thalassaemia) Findings: osteoporosis, chondrocalcinosis (calcium pyrophosphate deposition disease), arthropathy, resembles calcium pyrophosphate deposition disease arthropathy, distinctive feature: BEAK-like osteophytes at MCP jts, mottled increased density of liver and spleen, Definitions: haemosiderosis: haemosiderin deposition within cells, haemochromatosis: haemosiderin within cells AND interstitium (12 Dec 1998) |
| haemospermia | The presence of blood in the seminal fluid. Synonym: haematospermia. Origin: haemo-+ G. Sperma, seed (05 Mar 2000) |
| haemospermia spuria | Haemospermia occurring in the prostatic urethra. (05 Mar 2000) |
| haemospermia vera | Haemospermia in which the bleeding is from the seminal vesicles. (05 Mar 2000) |
| haemosporidium | A blood parasite of the order Haemosporidia. Origin: haemo-+ Mod. L. Dim. Of G. Sporos, seed (05 Mar 2000) |
| haemosporina | A suborder of heteroxenous protozoa in which the macrogamete and microgamont develop independently. A conoid is usually absent. (12 Dec 1998) |
| haemosporines | Common term for members of the order Haemosporidia. (05 Mar 2000) |
| haemostasia | <haematology, physiology, haematology> The arrest of bleeding, either by the physiological properties of vasoconstriction and coagulation or by surgical means. Origin: Gr. Stasis = halt (18 Nov 1997) |