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Saturday, March 5, 2011

Alopecia Areata

Alopecia Areata


Alopecia Areata (AA) is a condition in which there is a loss of hair on the scalp or the body.

It is affecting 1 percent of the population mostly the children.

Even adults are also affected by Alopecia Areata and it can occur at any age.

According to scientists, it is an autoimmune disease in which hair follicles are attacked by WBC from the immune system and kept them away from the producing hairs.

TYPES

  • Alopecia areata multilocularis
  • Alopecia areata barbae
  • Alopecia areata totalis
  • Alopecia areata monolocularis
  • Diffuse alopecia areata
  • Alopecia areata universalis

CAUSES

It is an autoimmune disease and not considered as contagious. The cause for Alopecia Areata is not known. Genetic factor can be one of the causes for AA.

SIGNS AND SYMPTOMS OF AA

It starts with one or small, coin size, round, bare patches. It is mostly common on the scalp and even includes eyelashes, eyebrows and beards. Hair grows with the full hair regrowth.

There is no such symptom which can cause Alopecia areata but there can be itching or minor discomfort when a new patch is developed. Nails also become distorted and can have tiny pinpoint dents. This is not a serious disease and the person can have risk of asthma, atopic eczema, allergies etc.

DIAGNOSIS

It occurs mostly in the late teenage years and with almost people of all ages. Fingernails can also be affected along with the hair loss. Diagnosis is done in which other treatable diseases are excluded that can be the cause for hair loss such as tinea capitis and trichotillomania. Patches of broken hair and no skin changes which are associated with the alopecia areata can be found in trichotillomania.

TREATMENT

There is no permanent cure or treatment for alopecia areata but these treatments promote new patches of hair loss and hair growth. Many treatments are available and they are:-

  • Anthralin – It is a substance which looks like a synthetic tar that alters immune system which affects the skin. It can be applied for 20 to 60 minutes and should be washed off to protect from skin irritation.
  • Corticosteroids – These drugs are taken as pills and given in the form of injections in the areas of hair loss. Steroid injections can also be given in the patches on the scalp and any hair bearing skin. Corticosteroids will have positive side effects if taken by mouth.
  • Topical minoxidil 5% solution – This solution can be applied twice to the scalp which promotes the hair growth in children and adults and new hair will appear in 12 weeks.

Caps, hats and wigs are worn by the people having alopecia areata and it does not affect the general health.

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Details of data retention

Details of data retention

General expectations

IP and other technical information

When a visitor requests or reads a page, or sends email to a Wikimedia server, no more information is collected than is typically collected by web sites. The Wikimedia Foundation may keep raw logs of such transactions, but these will not be published or used to track legitimate users.
When a page is edited by a logged-in editor, the server confidentially stores related IP information for a limited period of time. This information is automatically deleted after a set period. For editors who do not log in, the IP address used is publicly and permanently credited as the author of the edit. It may be possible for a third party to identify the author from this IP address in conjunction with other information available. Logging in with a registered username allows for better preservation of privacy.

Cookies

The sites set a temporary session cookie on a visitor's computer whenever a Project page is visited. Readers who do not intend to log in or edit may deny this cookie; it will be deleted at the end of the browser's session. More cookies may be set when one logs in to maintain logged-in status. If one saves a user name or password in one's browser, that information will be saved for up to 30 days, and this information will be resent to the server on every visit to the same Project. Contributors using a public machine who do not wish to show their username to future users of the machine should clear these cookies after use.

Page history

Edits or other contributions to a Project on its articles, user pages and talk pages are generally retained forever. Removing text from a project does not permanently delete it. Normally, in projects, anyone can look at a previous version of an article and see what was there. Even if an article is "deleted", a user entrusted with higher level of access may still see what was removed from public view. Information can be permanently deleted by individuals with access to Wikimedia servers, but aside from the rare circumstance when the Foundation is required to delete editing-history material in response to a court order or equivalent legal process, there is no guarantee any permanent deletion will happen.

User contribution

User contributions are also aggregated and publicly available. User contributions are aggregated according to their registration and login status. Data on user contributions, such as the times at which users edited and the number of edits they have made, are publicly available via user contributions lists, and in aggregated forms published by other users.
Reading projects
No more information on users and other visitors reading pages is collected than is typically collected in server logs by web sites. Aside from the above raw log data collected for general purposes, page visits do not expose a visitor's identity publicly. Sampled raw log data may include the IP address of any user, but it is not reproduced publicly.
Editing projects
Edits to Project pages are identified with the username or network IP address of the editor, and editing history is aggregated by author in a contribution list. Such information will be available permanently on the projects.
Logged in registered users:
Logged in users do not expose their IP address to the public except in cases of abuse, including vandalism of a wiki page by the user or by another user with the same IP address. A user's IP address is stored on the wiki servers for a period of time, during which it can be seen by server administrators and by users who have been granted CheckUser access.
IP address information, and its connection to any usernames that share it, may be released under certain circumstances (see below).
Editors using a company mail server from home or telecommuting over a DSL or cable Internet connection, are likely to be easy to identify by their IP address; in which case it may be easy to cross-identify all contributions to various Projects made by that IP. Using a username is a better way of preserving privacy in this situation.
Unlogged-in registered users and unregistered users:
Editors who have not logged in may be identified by network IP address. Depending on one's connection, this IP address may be traceable to a large Internet service provider or more specifically to a school, place of business or home. It may be possible to use this information in combination with other information, including editing style and preferences, to identify an author completely.
Discussions
On wiki discussion pages:
Any editable page can theoretically be the location of a discussion. In general, discussions on Foundation projects occur on user talk pages (associated with particular users), on article talk pages (associated with particular articles) or in pages specially designated to function as forums (e.g., the Village Pump). Privacy expectations apply to discussion pages in the same way as they do elsewhere.
Via email:
Users are not required to list an email address when registering. Users who provide a valid email address can enable other logged-in users to send email to them through the wiki. When receiving an email from other users through this system, one's email address is not revealed to them. When choosing to send an email to other users, one's email is displayed as the sender.
The email address put into one's user preferences may be used by the Foundation for communication. Users whose accounts do not have a valid email address will not be able to reset their password if it is lost. In such a situation, however, users may be able to contact one of the Wikimedia server administrators to enter a new e-mail address. A user can remove the account's email address from his preferences at any time to prevent it from being used. Private correspondence between users may be saved at those users' discretion and is not subject to Wikimedia Foundation policy.
On mailing lists:
The email addresses used to subscribe and post to Project mailing lists are exposed to other subscribers. The list archives of most such mailing lists are public, and searches of public archives may be performed on the Web. Subscribers' addresses may also be quoted in other users' messages. These email addresses and any messages sent to a mailing list may be archived and may remain available to the public permanently.
Via OTRS:
Some e-mail addresses (such as info-en at wikimedia dot org) forward mail to a team of volunteers trusted by the Foundation to use a ticket system, such as OTRS, to respond. Mail sent to this system is not publicly visible, but volunteers selected by the Foundation will have access to it. The ticket system team may discuss the contents of received mail with other contributors in order to respond effectively. Mail to private addresses of members of Board of Trustees and to staff of the Foundation may also be forwarded to the OTRS team. These messages and e-mail addresses may be saved by members of the OTRS team and any email service they use, and may remain available to them.
On IRC:
IRC channels are not officially part of the Wikimedia Foundation and are not operated on Wikimedia controlled servers. The IP address of users who chat over such a service may be exposed to other participants. IRC users' privacy on each channel can only be protected according to the policies of the respective service and channel. Different channels have different policies on whether logs may be published.

Purpose of the collection of private information

Purpose of the collection of private information

The Foundation limits the collection of personally identifiable user data to purposes which serve the well-being of its projects, including but not limited to the following:

To enhance the public accountability of the projects. The Foundation recognizes that any system that is open enough to allow the greatest possible participation of the general public will also be vulnerable to certain kinds of abuse and counterproductive behavior. The Foundation and the project communities have established a number of mechanisms to prevent or remedy abusive activities. For example, when investigating abuse on a project, including the suspected use of malicious “sockpuppets” (duplicate accounts), vandalism, harassment of other users, or disruptive behavior, the IP addresses of users (derived either from those logs or from records in the database) may be used to identify the source(s) of the abusive behavior. This information may be shared by users with administrative authority who are charged by their communities with protecting the projects.
To provide site statistics. The Foundation statistically samples raw log data from users' visits. These logs are used to produce the site statistics pages; the raw log data is not made public.
To solve technical problems. Log data may be examined by developers in the course of solving technical problems and in tracking down badly-behaved web spiders that overwhelm the site

User accounts and authorship

User accounts and authorship

The Foundation does not require editors to register with a project. Anyone can edit without logging in with a username, in which case they will be identified by network IP address. Users that do register are identified by their chosen username. Users select a password, which is confidential and used to verify the integrity of their account. Except insofar as it may be required by law, no person should disclose, or knowingly expose, either user passwords and/or cookies generated to identify a user. Once created, user accounts will not be removed. It may be possible for a username to be changed, depending on the policies of individual projects. The Foundation does not guarantee that a username will be changed on request.

General Scope

General Scope

This policy covers personally identifiable information collected or stored by the Foundation on its servers in relation to the Projects and their communities. Consistent with its Data Retention Policy, the Foundation collects and retains the least amount of personally identifiable information needed to fulfill the Projects' operational needs.

The public and collaborative nature of the projects

All Projects of the Wikimedia Foundation are collaboratively developed by its users using the MediaWiki software. Anyone with Internet access (and not otherwise restricted from doing so) may edit the publicly editable pages of these sites with or without logging in as a registered user. By doing this, editors create a published document, and a public record of every word added, subtracted, or changed. This is a public act, and editors are identified publicly as the author of such changes. All contributions made to a Project, and all publicly available information about those contributions, are irrevocably licensed and may be freely copied, quoted, reused and adapted by third parties with few restrictions

Laser resurfacing

Laser resurfacing

Laser resurfacing is a technique used during laser surgery wherein molecular bonds are dissolved by laser. It is used for the treatment of wrinkles, solar lentigenes, sun damage, scars (see acne scar treatment), stretch marks, actinic keratosis and telangiectasias or "spider veins".

It can be combined with liposuction to remove excess fat from the chin and jaw area. The skin may be wrinkled after fat is removed and laser resurfacing can help tighten and smooth over the new contours.

Laser resurfacing is usually done with a 2940 nm Er:YAG laser or a 10,600 nm CO2 laser. Complete resurfacing was first done with a CO2 laser. More commonly now, laser resurfacing is done with a fractional laser. The term fractional pertains to the method in which the laser light is transferred. Tiny pinpoints of laser light are used to deliver the laser to the surface of the skin in only a fraction of the area. Several hundred or thousands of laser pinpoints may be used per square inch, leaving healthy skin in between the ablated areas, to allow more rapid healing and lower risk.

Skin resurfacing can also be performed with a plasma-based device instead of a laser. At least one manufacturer of such a plasma device[who?] claims "It’s the only treatment proven to generate new skin, at the fundamental levels, for as long as a year after treatment".[3] However these claims do not have supporting evidence published in a peer-reviewed medical journal, and have not been verified by any independently funded studies. Superiority to laser-based devices remains an open question.

Fractional photothermolysis (FP) is another form of laser treatment with several devices currently on the market. Some doctors claim FP provides similar results to CO2 laser resurfacing without risk of scarring or significant downtime. As of January 2008, there are a number of papers referenced on PubMed which mostly support those claims.[citation needed] Complications observed in a study of 961 treatments included acneiform eruptions (1.87%) and herpes simplex virus outbreaks (1.77%). Side effects and complications observed in this study were of a temporary nature.[4] There have been, however, anecdotal negative accounts of bad scarring and hyperpigmentation without any findings of infection.[5]

When compared to a chemical peel, dermabrasion or other forms of laser treatment, a laser allows the surgeon to customize the surgery not only for each patient but also to each area of the face.

CO2 laser resurfacing has been shown to have an increased risk of hypopigmentation and scarring when compared to the erbium lasers. This is due to the high degree of coagulation and thus heat production that occurs as a nature of the CO2 wavelength. Both Erbium and Co2 fractional systems have a better safety profile than lasers of the past.

Both Erbium and CO2 are used to treat deep rhytides, sun damage and age spots. Through the heating of the deep dermis, fibroblasts are stimulated to form new collagen and elastin helping to bring increased turgor and thickness to the skin.