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Brown birthmarks are simply unusually high concentrations of melanocytes - pigment bearing cells - in an area of the skin. If small (typically less than the diameter of the flat end of a standard pencil) such marks are commonly called "moles", and most people have at least 10 on their bodies. Many such moles appear later in life (usually from age 7 upwards, especially at puberty), and, therefore, are not really "birthmarks".
Brown birthmarks - ie brown marks on the body at birth, or appearing in the first weeks of life - take a variety of forms from small moles to much larger marks; they may be flat to the skin surface or slightly raised; some may be hairy, but most are not. "Classic" brown birthmarks tend to be darker in color, are usually regularly defined, and are often round or oval shaped, although a few may be more "square" or triangular.
"Cafe Au Lait" marks are, as the term indicates, usually a lighter (coffee) colour; are typically irregularly defined, and are always flat and indistinguishable by touch from surrounding skin. They can occur in multiples - 5 or more such marks on one person MAY be indicative of certain neurological disorders. Some Cafe Au Lait marks contain constellations of darker freckles within their boundaries.
Typically, in most populations, 2-10% of people have brown birthmarks. Most are located on the trunk, buttocks/ hips, and legs, and they're somewhat more common in females than males.
A "Becker's Nevus" is an often quite extensive area of brown skin pigmentation, typically hairy, and sometimes accompanied by skin thickening in the mark, that develops on the arms, shoulders or upper torso of a small percentage of males (0.2 - 2% - studies vary) at puberty. The emergence of such marks is almost certainly triggered by the testosterone surge of puberty; no-one is certain why they occur in some young males, but because they're probably genetically determined (and, therefore "pre-programmed" from gestation) most doctors regard such marks as a type of "birthmark".
Generally, most brown birthmarks are harmless, but some do become malignant, and, therefore, any change or unusual sensation in a mark must be referred to a doctor immediately. Contrary to popular belief, hairy moles and brown birthmarks are not more like to become cancerous - in fact, most studies indicate that these are the least likely moles and birthmarks to turn nasty.
Brown birthmarks, also known as café-au-lait spots, are flat patches on the skin that are darker in color than the surrounding skin. They are typically present at birth or develop during early childhood. While usually benign, large or multiple café-au-lait spots may be associated with certain genetic conditions and should be evaluated by a healthcare provider.
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What is the father and mother name of Robert brown?
Robert Brown's father was James Brown and his mother was Helen Brown.
Of 20 students in class 15 have brown hair 16 have brown eyes and 12 have both brown hair and brown eyes how many students have neither brown hair nor brown eyes?
There are 4 students who do not have brown hair or brown eyes. This can be calculated by adding the students with brown hair (15) and brown eyes (16), then subtracting the students with both (12) from that total. This gives us 19 students with either brown hair or brown eyes. Subtracting this from the total number of students (20) gives us the number of students with neither brown hair nor brown eyes.
What colours is the Planet Jupiter?
dark brown and light brown
Another name for brown algae is?
The other name for the brown algae is Phaeophyceae.
How do you know if your eyes are hazel or brown?
Hazel eyes typically have a combination of brown and green tones, while brown eyes are a solid shade of brown. To determine if your eyes are hazel or brown, look in the mirror under natural lighting. If you see distinct hints of green mixed in with the brown, then your eyes are likely hazel.
Where is the most common spot birthmarks are located?
Many people have red or pink birthmarks on the back of their heads and/ or necks, and many newborns of Asian ancestry have blue or greyish "Mongolian marks" at the base of the spine or across the buttocks. Brown birthmarks frequently occur either on the torso or on the lower half of the body, especially on thighs and buttocks.
Do American Indians have birthmarks?
do Hopi tribe Indians have birthmarks
Are moles bigger than birthmarks?
Generally birthmarks are larger
When was Birthmarks - album - created?
Birthmarks - album - was created in 2001.
When was Birthmarks created?
Birthmarks was created on 2008-10-14.
What is birthmarks?
birthmarks are a rare skin disease, it usually happens in the whom
Do Birthmarks tan?
Yes, birthmarks do tan. If you have a birthmark you must be careful of this. Birthmarks are more likely to contract skin cancer if in the sun excessively without sunscreen.
Is there a world record for having the most birthmarks?
There is no official world record for having the most birthmarks as the number of birthmarks a person can have varies greatly and is not typically tracked or documented. Each person may have a different number and size of birthmarks.
Is it common to have two birthmarks?
It's not uncommon - I have a brown birthmark on one of my buttocks, and a reddish mark on the back of my neck. I also have about 50 small moles on my body, although having appeared later in life these are not really "birthmarks". My wife also has two birthmarks - a purple patch at the base of her spine, and a faint "cafe au lait" mark on the jawline. I have noticed that many other people have more than one birthmark, and most people have at least 10 moles on their bodies.
Why is your birthmark fading?
Experts do not fully understand the cause of birthmarks. Birthmarks cannot be prevented and are not caused by anything done during pregnancy. One theory to the cause of birthmarks are genetics.
Do birthmarks resemble how you died in the past?
Highly probable. See link; "Double Birthmarks. The Case Of Titu"
Why do we have birthmarks?
There are two main types of birthmarks, which have different causes: Vascular birthmarks happen when blood vessels don't form correctly. Either there are too many of them or they're wider than usual. Pigmented birthmarks are caused by an overgrowth of the cells that create pigment (color) in the skin.
