Microcomedo
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  Microcomedo



Microcomedo

    The first stage of comedo formation; a comedo so small that it can be seen only with a microscope.

RELATED TERMS
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Comedo
See blackhead.

Microscope
A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. The science of investigating small objects using such an instrument is called microscopy, and the term microscopic means minute or very small, not easily visible with the unaided eye. In other words, requiring a microscope to examine.



SIMILAR TERMS
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Micrainin
Micrainin is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): aspirin; meprobamate.

Micro-k
Micro-k is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): potassium chloride.

Micro-k 10
Micro-k 10 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): potassium chloride.

Micro-k ls
Micro-k ls is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): potassium chloride.

Microalbumin
Small amounts of protein in the urine that cannot be detected by the usual "dipstick" test done for routine urinanalysis testing for other reasons. Specialized dipsticks, or urine collections over a period of 12-24 hours, are used to measure the amount of microalbumin. If there is persistent microalbumin over several repeated tests at different times, the risk of diabetic nephropathy and macrovascular disease are both higher.

Microaneurysm
A small swelling that forms on the side of tiny blood vessels. These small swellings may break and bleed into nearby tissue. People with diabetes sometimes get microaneurysms in the retina of the eye.

Microangiopathy
See: Angiopathy.

Microbe
Microscopic organism, especially one that transmits a disease.

Microbiology
The study of living microbes, including bacteria, protozoa and molds.

Microcannula
A hair-thin glass tube so small that it can penetrate a single cell and deliver a minute drop of a liquid substance to the cell.

Microcephaly
A small skull with small cranial capacity. Usually indicates mental retardation.

Microcyst
A tiny cyst, frequently of such dimensions that a magnifying lens or microscope is required for observation.

Microderm
Microderm is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): chlorhexidine gluconate.

Microelectrode
An electrode made of a filament so hair-thin that it can penetrate a single cell, such as a nerve cell, and deliver to or receive from the cell a minute amount of electrical current.

Microelectrodes
Electrodes with an extremely small tip, used in a voltage clamp or other apparatus to stimulate or record bioelectric potentials of single cells intracellularly or extracellularly.

Microencephaly
Having an abnormally small brain.

Microgestin fe 1-20
Microgestin fe 1-20 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ethinyl estradiol; norethindrone acetate.

Microgestin fe 1.5-30
Microgestin fe 1.5-30 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ethinyl estradiol; norethindrone acetate.

Micrographia
A change in handwriting with the script becoming smaller and more cramped.

Microhepatia
A small liver.

Microlite
Microlite is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): technetium tc-99m albumin colloid kit.

Micromelia
A birth defect in which arms or legs are abnormally short.

Micronase
Micronase is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): glyburide.

Micronor
Micronor is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): norethindrone.

Micronutrient
Vitamins and minerals that have no caloric value and little direct impact on hormonal response.

Microorganism
An organism that can be seen only under a microscope. Categories of microorganisms include Algae, Bacteria, Fungi, Protozoa, Viruses, or Subviral Agents. Also referred to as microbe.

Micropenis
A birth defect in which the penis is extremely small. The maximum stretched length is not greater than .5 standard deviation units (SDU) below the mean for age, and possibly as small as 5.0 SDU below. The diameter is correspondingly small, with extreme hypoplasia of the corpora cavernosa. As compared with a micropenis, the average adult penis's stretched length is 6.6 inches (16.7 cm), with a standard deviation of 0.77 inches ([1.95 cm) (Money, Lehne, and Pierre-Jerome, 1984) an exceptionally small penis that resembles the clitoris in size. A micropenis may carry the urethral tube or may be hypospadiac. Typically, it is formed mostly of skin, the body (corpora cavernosa) of the penis being hypoplastic. The condition is also known as microphallus or penile agenesis.

Microphallus
See micropenis.

Microphthalmus
A congenital problem in which the eye(s) is (are) smaller than normal. Vision is often reduced because other problems present within such an eye. No treatment is available.

Micropsia
The visual perception that objects are smaller than they actually are.

Microscope
A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. The science of investigating small objects using such an instrument is called microscopy, and the term microscopic means minute or very small, not easily visible with the unaided eye. In other words, requiring a microscope to examine.

Microscopy
Investigation of minute objects by means of a microscope.

Microspectrophotometry (MSP)
A procedure that involves the passage of a narrow measuring beam through the outer segments of individual photoreceptors to measure absorbance spectra in excised retinas.

Microsul
Microsul is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): sulfamethizole.

Microsurgery
Precise, delicate surgery performed to unblock Fallopian tubes or to reverse a vasectomy or tubal ligation.

Microvascular Disease
Disease of the smallest blood vessels that sometimes occurs when a person has had diabetes for a long time. The walls of the vessels become abnormally thick but weak, and therefore they bleed, leak protein, and slow the flow of blood through the body. Then some cells, for example, the ones in the center of the eye, may not get enough blood and may be damaged.

Microzide
Microzide is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): hydrochlorothiazide.



PREVIOUS AND NEXT TERMS
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Motor Neurone Disease
Motor Neurone Disease (MND) is a term used to cover a number of illnesses of the motor neurone. Amyotrophic Lateral Sclerosis (ALS), Progressive Muscular Atrophy (PMA), Progressive Bulbar Palsy (PBP) and Progressive Lateral Sclerosis (PLS) are all types of MND. MND is the term used internationally while ALS is often used in the United States (where it is also known as Lou Gehrig's disease) to cover all forms of MND. It was first described by Jean-Martin Charcot, a French neurologist, in 1869.

Metabolic Syndrome (MS)
A combination of health conditions that place a person at high risk for heart disease. These conditions are type 2 diabetes, hypertension (high blood pressure), hyperlipidemia (high levels of fat in the blood), and obesity. According to theory, all of these conditions are associated with high blood insulin levels, and it is claimed that the underlying problem in patients with the Metabolic Syndrome is faulty insulin release from the beta cells of the pancreas. Previously called Syndrome X.

Marfan Syndrome
Disorder of the connective tissue, affecting the heart and blood vessels, skeletal system, eyes, and other parts of the body. The condition is present at birth. Symptoms vary from person to person, ranging from mild to severe. People with Marfan syndrome are often nearsighted (see myopia), and about half have dislocation of one or both lenses of the eye. There is no cure for Marfan syndrome. Treatment depends on which body systems are affected. Early eye examinations can detect vision problems related to the disorder, which can usually be corrected with eyeglasses or contact lenses.

Myelodysplastic Syndrome
A group of neoplasms that originate in a primitive multipotential hematopoietic cell.. About half of the cases are mild to moderate anemias accompanied by mild to moderately reduced white cell and platelet counts. Often, these are not progressive but they have a heightened propensity to evolve into acute myelogenous leukemia. The other half of the cases are a type of low blast count leukemia that may be associated with severe white cell and platelet deficits. Many of the patients affected require transfusion therapy, have a propensity to infection or to bleeding, and frequently progress to more overt leukemia.

Morning after pill
The morning-after pill, also known as emergency contraception or emergency birth control, is a pill regimen that a woman can take up to three days after she has had sexual intercourse to prevent the implantation of a fertilized egg in her uterus. The term morning-after pill is a misnomer that is falling out of use (replaced by emergency contraceptive pills or ECPs) due to the fact that it is effective for up to 120 hours after sex.

Microcomedo

Marihuana
Also called marijuana, weed, pot, reefer, grass, dope, ganja, mary jane, and hash. It is the drug most often used worldwide. It is a mix of dried, shredded flowers and leaves of the hemp plant (Cannabis sativa). Most users roll loose marijuana into a cigarette (called a "joint"). The drug can also be smoked in a water pipe, called a "bong" Some users mix marijuana into food or use it to brew a tea. Hash users either smoke the drug in a pipe or mix it with tobacco and smoke it as a cigarette.

Marijuana
Also called marihuana, weed, pot, reefer, grass, dope, ganja, mary jane, and hash. It is the drug most often used worldwide. It is a mix of dried, shredded flowers and leaves of the hemp plant (Cannabis sativa). Most users roll loose marijuana into a cigarette (called a "joint"). The drug can also be smoked in a water pipe, called a "bong" Some users mix marijuana into food or use it to brew a tea. Hash users either smoke the drug in a pipe or mix it with tobacco and smoke it as a cigarette.

Methamphetamine
A central nervous system stimulant similar to amphetamine sulfate but more potent. It is a member of the amphetamine class and is preferred by habitual amphetamine users. In intravenous form, it produces an almost instantaneous onset of the drug's effect. Slang names include "meth," "speed," and "crystal."

Malignant fibrous histiocytoma
Malignant fibrous histiocytoma is a sarcoma that usually begins in soft tissue. It usually appears as an enlarging, painful mass that can cause fracture due to destruction of the bone by a spreading tumor.

Malignant
Cancerous; life-threatening.

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