Athelia
Absence of the nipple. Athelia is a rare condition but it is common in certain conditions. Athelia tends to occurs on one side (unilaterally) in children with the Poland sequence and on both sides (bilaterally) in certain types of ectodermal dysplasia. The Poland sequence (named for Alfred Poland, a celebrated 19th-century British surgeon and ophthalmologist) is a unique pattern of one-sided malformations characterized by a defect of the chest (pectoralis) muscle on one side of the body and webbing of the fingers (cutaneous syndactyly) of the ipsilateral hand (the hand on the same side). It is right-sided three times more often than it is left-sided. The disorder is currently considered "a nonspecific developmental field defect" occurring at about the sixth week of fetal development. The cause is uncertain. In Poland syndrome there is aplasia of the sternal head of the pectoralis major: the end of the main chest muscle that normally attaches to the breastbone is missing. On that side of the body, nearby chest muscles (the serratus anterior and latissimus dorsi muscles) may also be absent as may be the armpit (axillary) hair. In girls, the breast on that side is also usually absent (amastia) and there is no nipple. There is athelia. Ectodermal dysplasia is not one but a number of hereditary conditions usually characterized by the abnormal development of skin, absence of sweat glands, dry eyes and abnormal development of teeth — all structures derived from the ectoderm (the outside layer in early embryonic development). The absence of sweat glands leads to an inability to sweat and heat intolerance. Athelia also occurs in association with the progeria (premature aging) syndrome and the Yunis-Varon syndrome (a multiple congenital malformation first reported in 1980). Athelia is distinguished from amastia, wherein the breast is absent, and from amazia, wherein breast tissue is absent but the nipple is still resent.
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Congenital absence of the nipples. [G. a- priv. + thele, nipple]

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athe·lia (ə-theґle-ə) [a-1 + thel- + -ia] congenital absence of the nipple(s).

Medical dictionary. 2011.

Look at other dictionaries:

  • Athelia — Infobox Disease Name = PAGENAME Caption = DiseasesDB = 30613 ICD10 = ICD10|Q|83|2|q|80 ICD9 = ICD9|757.6 ICDO = OMIM = 113700 MedlinePlus = eMedicineSubj = ped eMedicineTopic = 2944 MeshID = Athelia is the congenital absence of one or both… …   Wikipedia

  • Athelia — ID 8647 Symbol Key ATHEL Common Name athelia lichen Family Atheliaceae Category Lichen Division Basidiomycota US Nativity N/A US/NA Plant Yes State Distribution N/A Growth Habit N/A …   USDA Plant Characteristics

  • Athelia — bespenystė statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Athelia ryšiai: platesnis terminas – pieno liaukos sutrikimas …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Athelia — bespenystė statusas T sritis embriologija atitikmenys: lot. Athelia ryšiai: platesnis terminas – bendrosios dangos ydos siauresnis terminas – daugiaspenystė siauresnis terminas – kirkšninis spenelis siauresnis terminas – maži pieno liaukos… …   Medicininės histologijos ir embriologijos vardynas

  • Athelia arachnoidea — Scientific classification Kingdom: Fungi Phylum: Basidiomycota Class: Basidiomycetes …   Wikipedia

  • Athelia (fungus) — Athelia Athelia neuhoffii Scientific classification Kingdom: Fungi …   Wikipedia

  • Athelia rolfsii — Athelia rolfsii …   Wikipédia en Français

  • Athelia rolfsii — Taxobox name = Athelia rolfsii regnum = Fungi phylum = Basidiomycota classis = Basidiomycetes subclassis = Agaricomycetidae ordo = Atheliales familia = Atheliaceae genus = Athelia species = A. rolfsii binomial = Athelia rolfsii binomial authority …   Wikipedia

  • Athelia epiphylla — ID 8648 Symbol Key ATEP Common Name athelia lichen Family Atheliaceae Category Lichen Division Basidiomycota US Nativity Native to U.S. US/NA Plant Yes State Distribution N/A Growth Habit Lichenous …   USDA Plant Characteristics

  • Athelia poeltii — ID 8649 Symbol Key ATPO5 Common Name Poelt s athelia lichen Family Atheliaceae Category Lichen Division Basidiomycota US Nativity Native to U.S. US/NA Plant Yes State Distribution N/A Growth Habit Lichenous …   USDA Plant Characteristics

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