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Athelia (disease)
Athelia is the congenital absence of one or both nipples. It is a rare condition. It sometimes occurs on one side in children with the Poland sequence and on both sides in certain types of ectodermal dysplasia Ectodermal dysplasia (ED) is a group of genetic syndromes all deriving from abnormalities of the ectodermal structures.James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). S .... ETYMOLOGY Athelia, A-thelia, from the Greek "''A''", without, and "''thelium''" (singular), "''thelia''" (plural) nipple(s). Sources External links Congenital disorders of breasts {{congenital-malformation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nipple
The nipple is a raised region of tissue on the surface of the breast from which, in females, milk leaves the breast through the lactiferous ducts to feed an infant. The milk can flow through the nipple passively or it can be ejected by smooth muscle contractions that occur along with the ductal system. The nipple is surrounded by the areola, which is often a darker colour than the surrounding skin. A nipple is often called a teat when referring to non-humans. Nipple or teat can also be used to describe the flexible mouthpiece of a baby bottle. In humans, the nipples of both males and females can be stimulated as part of sexual arousal. In many cultures, human female nipples are sexualized, or "regarded as sex objects and evaluated in terms of their physical characteristics and sexiness." Anatomy In mammals, a nipple (also called mammary papilla or teat) is a small projection of skin containing the outlets for 15–20 lactiferous ducts arranged cylindrically around the tip. Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poland Sequence
Poland syndrome is a birth defect characterized by an underdeveloped chest muscle and short webbed fingers on one side of the body. There may also be short ribs, less fat, and breast and nipple abnormalities on the same side of the body. Typically, the right side is involved. Those affected generally have normal movement and health. The cause of Poland syndrome is unknown. One theory is that it is due to disruption of blood flow during embryonic development. It is generally not inherited, and no genes that contribute to the disorder have been identified. Diagnosis of Poland syndrome is based on its symptoms. Often, those with the syndrome remain undiagnosed, and some may not realize they have it until puberty. Treatment of Poland syndrome depends on its severity and may include surgical correction. The syndrome affects about 1 in 20,000 newborns, and males are affected twice as often as females. It is named after English surgeon Sir Alfred Poland, who described the conditio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ectodermal Dysplasia
Ectodermal dysplasia (ED) is a group of genetic syndromes all deriving from abnormalities of the ectodermal structures.James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). Saunders. . More than 150 different syndromes have been identified. Despite some of the syndromes having different genetic causes, the symptoms are sometimes very similar. Diagnosis is usually by clinical observation, often with the assistance of family medical histories so that it can be determined whether transmission is autosomal dominant or recessive. Ectodermal dysplasias are described as "heritable conditions in which there are abnormalities of two or more ectodermal structures such as the hair, teeth, nails, sweat glands, salivary glands, cranial-facial structure, digits and other parts of the body." Presentation Hair Individuals affected by an ED syndrome frequently have abnormalities of the hair follicles. Scalp and body hair ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
