spot
[spot]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.
blind spot
1. optic disk.
2. mental scotoma.
café au lait spot a light brown pigmented macule seen in neurofibromatosis and albright's syndrome.
cherry-red spot 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.
focal spot
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.
liver spot
1. a lay term for senile lentigo.
2. (in pl.) tinea versicolor.
mental blind spot mental scotoma.
mongolian spot 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.
Tay's spot cherry-red spot.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
spot
(spot),1. Synonym(s): macula
2. To lose a slight amount of blood through the vagina.
Farlex Partner Medical Dictionary © Farlex 2012
spot
(spŏt)n.
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.
v.
To lose a slight amount of blood through the vagina.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
spot
PathologyA 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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
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.McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
spot
(spot)1. Synonym(s): macula.
2. To lose a slight amount of blood through the vagina.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
spot
A popular term for any small lump or inflamed area on the skin such as a PUSTULE, PAPULE, COMEDONE, CYST, MACULE, SCAB or VESICLE.Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
spot
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.
Bitot's spot 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.
cherry-red spot 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; exudate.
Elschnig's s'spot 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.
Roth's spot 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.
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.
Bitot's spot 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.
cherry-red spot 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; exudate.
Elschnig's s'spot 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.
Roth's spot 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.
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Fig. S11 Demonstration of the blind spot
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Fig. S12 Cherry-red spot at the macula
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
spot
(spot)1. Synonym(s): macula.
2. To lose a slight amount of blood through the vagina.
Medical Dictionary for the Dental Professions © Farlex 2012
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)
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:
http://www.naaf.org/treatment.html
http://www.naaf.org/treatment.html
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:
http://menshealth.about.com/od/diseasesconditions/a/penis_spots.htm
More discussions about spothttp://menshealth.about.com/od/diseasesconditions/a/penis_spots.htm
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