a circumscribed area or place, usually distinguished by its color; see also macula
actual focal spot the section of a focal spot on which there is intersection of an electron beam with an anode of an x-ray tube.
Bitot's s's foamy gray triangular spots of keratinized epithelium on the conjunctivae, a sign of vitamin A deficiency.
the choroid appearing as a red circular area surrounded by gray-white retina, as viewed throught the fovea centralis in tay-sachs disease
. Called also Tay's spot
cotton-wool spot white or gray soft-edged opacities in the retina composed of cytoid bodies; seen in hypertensive retinopathy, lupus erythematosus, and numerous other conditions.
effective focal spot the size of a projected focal spot in a specified direction measured with a quality assurance test tool such as the slit camera.
1. the object of a patient's gaze during distraction techniques.
2. a small area of an x-ray target that receives the main electron stream.
Forschheimer s's a fleeting skin eruption consisting of discrete rose spots on the soft palate sometimes seen in rubella just prior to the onset of the skin rash.
Koplik's s's small, irregular, bright red spots on the buccal and lingual mucosa, with a minute bluish white speck in the center of each; they are pathognomonic of beginning measles.
a type of congenital brown to gray-blue nevus; see also mongolian spot
Roth's s's round or oval white spots consisting of coagulated fibrin seen in the retina in a number of diseases in which a vascular insult resulting in hemorrhage is followed by healing.
2. To lose a slight amount of blood through the vagina.
spot (spot) a circumscribed area; a small blemish; a macula.
Bitot's spots foamy gray, triangular spots of keratinized epithelium on the conjunctiva, associated with vitamin A deficiency.
café au lait spots macules of a distinctive light brown color, such as occur in neurofibromatosis and Albright's syndrome.
cherry-red spot the choroid appearing as a red circular area surrounded by gray-white retina, as viewed through the fovea centralis in Tay-Sachs disease.
cotton-wool spots white or gray soft-edged opacities in the retina, seen in hypertensive retinopathy, lupus erythematosus, and other conditions.
Forschheimer spots a fleeting exanthem consisting of discrete rose spots on the soft palate sometimes seen in rubella just prior to the onset of the skin rash.
the nucleolus of an oocyte
2. the sensitive area of a neuroma.
3. an area of increased density on an x-ray or thermographic film.
Koplik's spots irregular, bright red spots on the buccal and lingual mucosa, with tiny bluish-white specks in the center of each; seen in the prodromal stage of measles.
1. a lay term for any of the brownish spots on the face, neck, or backs of the hands in many older people.
milky spots aggregations of macrophages in the subserous connective tissue of the pleura and peritoneum.
mongolian spot a smooth, brown to grayish blue nevus, consisting of an excess of melanocytes, typically found at birth in the sacral region in Asians and dark-skinned races; it usually disappears during childhood.
pain spots spots on the skin where alone the sense of pain can be produced by a stimulus.
rose spots an eruption of rose-colored spots on the abdomen and thighs during the first seven days of typhoid fever.
Roth's spots round or oval white spots sometimes seen in the retina early in the course of subacute bacterial endocarditis.
Tardieu's spots spots of ecchymosis under the pleura after death by suffocation.
temperature spots spots on the skin normally anesthetic to pain and pressure but sensitive respectively to heat and cold.
1. A mark on a surface differing sharply in color from its surroundings.
2. A blemish, mark, or pimple on the skin.
3. A stain or blot.
To lose a slight amount of blood through the vagina.
(in psychotherapy) a small quantum of space that becomes the territorial object and extension of point behavior.
A term of art used in UK histopathology circles, for unknown (“black box”) cases which have such a classic appearance by light microscopy that they can be diagnosed instantly based on pattern recognition.
spot Gynecology See Spotting Vox populi A small lesion, usually on the skin. See Age spot, Bald spot, Black spot, Blind spot, Cafe-au-lait spot, Horder spot, Hot spot, Liver spot, Milk spot, Mongolian spot, Oak leaf spot, Powder burn spot, Rose spot, Strawberry spot, White spot.
2. To lose a slight amount of blood through the vagina.
A small surface area differing in appearance from its surroundings. Synonym: macula
2. Randomly collected, as in “spot” urine specimen.
White macules found on the trunk and extremities of persons with tuberous sclerosis.
Bitot spots See: Bitot spots
Physiological scotoma situated 15° to the outside of the visual fixation point; the point where the optic nerve enters the eye (optic disk), a region devoid of rods and cones. See: scotoma
2. In psychiatry, the inability of an individual to have insight into his or her own personality.
blue spotMongolian spot.
Brushfield spot See: Brushfield spot
A red spot occurring on the retina in children with Tay-Sachs disease. Synonym: Tay spot
An area on a nuclear medicine scan in which no radioactive tracer is taken up, indicative of nonfunctioning tissue in a gland or other structure.
A tiny infarct in the retina, present in hypertension, diabetes mellitus, bacterial endocarditis, and other diseases.
The area on the x-ray tube target that is bombarded with electrons to produce x-radiation.
Fordyce spots See: Fordyce disease
The area on the nasal mucosa that tends to bleed during menstruation. See: vicarious menstruation
Any of the focal red marks seen on esophageal varices. They consist of aneurysms of the wall of the dilated blood vessel. Their presence increases the likelihood that the varix may bleed.
Scarring of the macula found in those infected with Histoplasma capsulatum.
1. An area on the surface of the skin that, when stimulated, experiences a sensation of warmth.
2. In a nuclear medicine scan, a region of the image that shows an abnormally high concentration of injected isotope.
3. Any location that has been radioactively contaminated.
4. . In radiation oncology, a tissue region that is exposed to much more radiation than neighboring tissues.
hypnogenic spotHypnogenic zone.
Koplik spot See: Koplik spot
A popular term for a pigmentary skin discoloration, usually in yellow-brown patches. See: Lentigo senilis
A dense area of macrophages in the omentum.
Any of the blue or mulberry-colored spots usually located in the sacral region. It may be present at birth in Asian, American Indian, black, and Southern European infants and usually disappears during childhood. Synonym: blue spot See: illustration
Rose-colored maculae occurring on the abdomen or loins in typhoid fever.
Roth spots See: Roth spots
ruby spotCherry angioma.
The colloquial name for necrobiosis lipoidica diabeticorum. This condition is usually, but not always, associated with diabetes. See: necrobiosis lipoidica diabeticorum
Soemmering spot See: Soemmering, Samuel T. von
Tardieu spot See: Tardieu spot
Tay spot See: cherry-red spot
Trousseau spots See: Trousseau, Armand
Light-colored, elevated areas of various sizes occurring on the ventricular surface of the anterior leaflet of the mitral valve in endocarditis.
yellow spot Abbreviation: y.s.
A small, circumscribed area visibly different in colour or texture from the surrounding tissue.baring of the blind spot
A visual field defect in which there is such a marked contraction of the peripheral temporal visual field that it lies on, or nasal to, the blind spot. Although it may occur in open-angle glaucoma, it is not indicative of the disease as it also occurs in other conditions (e.g. miosis). See Bjerrum's scotoma
Foamy patch found on the bulbar conjunctiva near the limbus in xerophthalmia and due to vitamin A deficiency. Syn.
Bitot's patch.blind spot
Physiological negative scotoma in the visual field corresponding to the head of the optic nerve. It is not seen in binocular vision, as the two blind spots do not correspond in the field. In monocular vision it is usually not noticed. It has the shape of an ellipse with its long axis vertical and measuring approximately 7.5º, whereas its shorter axis along the horizontal measures approximately 5.5º. Its centre is located 15.5º to the temporal side of the centre of the visual field and 1.5º below the horizontal meridian. Syn.
blind spot of Mariotte; physiological blind spot; punctum caecum (Fig. S11). See myelinated nerve fibres
; retinal image
.blind spot enlargement
A visual field defect in which the blind spot appears larger than normal. One of the common causes is papilloedema.blind spot esotropia; syndrome See Swann's syndrome
Bright red appearance of the macular area in an eye with occlusion of the central retinal artery, Tay-Sachs disease or Niemann-Pick disease. In the case of central retinal artery occlusion the surrounding area is white due to ischaemia but the reddish reflex from the intact choroidal vessels beneath the fovea shows at that spot since the retina is thinnest there. There is a very marked, if not complete, loss of vision which appears suddenly. In cases of storage disease (i.e. Niemann-Pick or Tay-Sachs), the area surrounding the fovea is artificially whitened and opaque, offsetting the normal pinkish colour of the fovea (Fig. S12). See Niemann-Pick disease
; Sandhoff's disease
; Tay-Sachs disease
; retinal arterial occlusion
.cotton-wool s'spot See cytoid bodies
Small, yellowish spots found in the fundus in advanced hypertensive retinopathy. They are choroidal infarcts caused by insufficient blood supply.Fuchs'spot
A round or elliptical, pigmented spot, usually located in the macular or paramacular area. It occurs in patients who have pathological myopia. It is due to breaks in Bruch's membrane (called lacquer cracks
) and to the development of a choroidal neovascular membrane followed by subretinal haemorrhage which has changed colour and has become pigmented. The patient may notice photopsia when the membrane breaks but eventually it causes a loss of vision with a central scotoma. Syn.
Forster-Fuchs spot.Maxwell's spot
Entopic phenomenon in which the subject can observe a dark or greyish spot in the visual field corresponding to this fovea. This is accomplished by viewing a diffusely illuminated field through a purple-blue or dark blue filter. (These are the best colours for this observation.) This phenomenon is used clinically to detect eccentric fixation by placing a fixation point in the diffusely illuminated field. The degree of eccentric fixation can thus be estimated by asking the subject to describe the position of the grey spot with respect to the fixation point. See entoptic image
A small white spot consisting of coagulated fibrin seen in the middle of a retinal haemorrhage. It is associated with leukaemia, but it can be seen in subacute bacterial endocarditis, diabetic retinopathy, hypertensive retinopathy and vascular conditions with capillary fragility.
Fig. S11 Demonstration of the blind spot
Fig. S12 Cherry-red spot at the macula
2. To lose a slight amount of blood through the vagina.
a small, roundish part of a surface which differs from the surrounding surface.
a map with dots on it. Each dot marks where a case or some other incident of epidemiological interest occurred.
Patient discussion about spot
Q. after my husband and i have sex i have spotting and i have really bad cramps what could this be?
A. Hmm... I can think about several options, but it's not wise to try to diagnose people over the net. I think that seeing a gynecologist would be appropriate in this situation.
Meanwhile you can read more here http://en.wikipedia.org/wiki/Gynecologic_hemorrhage, http://womenshealth.about.com/cs/menstruation/a/bleedaftersex.htm and here http://www.mayoclinic.com/health/bleeding-after-sex/AN01192)
Q. I would like to get more information about Alopesia Areata(hair losing,bald spots all over my head) Well the Alopesia Areata couses the hair falling in big spots all over the head,you start losing your hair in a diferent way than what it ussually is,the doctor told me there is treatment for it but it does not really works,he said that the only thing i can do is just wait between 6 and 18 months, and after all that time my hair should be growing back;but its so traumatic, tha i cant wait that long, i am only 25 years old , i have a life to live ,please help me,i know is not that bad but i cant help it, if anybody knows about some cure ,that really works , please let me know ,thanks.
A. Alopecia Areata is considered lately as an auto immune disease , that means your body is attacking your hair. this considered beyond treatment. but there are several ways of handling it- local anti immunic treatment and so forth, here is a good site about it:
Q. what is a purple spot on penis
A. could be some kind of hematoma- a bruise, blood vessels that bleed internally and caused a"papula". if you press it and it changes color to white- that could be it. if not, here are some more suggestions:More discussions about spot