Hi Yvette,
I?m going to assume you mean pityriasis, the skin condition, and not
extinct flying reptiles! (If you do want information on flying
reptiles, let me know via an Answer Clarification and I?ll see what I
can do! :-) )
There are quite a few forms of pityriasis, described by
Merriam-Webster?s medical dictionary.com as ?any of several skin
diseases marked by the formation and desquamation of fine scales?
Pityriasis rosea
A common skin rash, occurring primarily in the spring and fall, and is
thought to be caused by a virus. The Medline web site says ?Attacks
generally last 4 to 8 weeks. Symptoms may disappear by 3 weeks or last
as long as 12 weeks. There is generally a single larger patch called a
herald patch followed several days later by more a rash. Although the
disorder usually resolves in time, a health care provider should be
consulted to rule out other disorders including syphilis.? No
treatment is usually needed.
http://www.nlm.nih.gov/medlineplus/ency/article/000871.htm
More from eMedicine.com
http://www.emedicine.com/EMERG/topic426.htm
More from the American Academy of Dermatology.
http://www.aad.org/pamphlets/pityrias.html
Merck Manual
http://www.merck.com/mrkshared/mmanual/section10/chapter117/117c.jsp
A picture of the pityriasis rosea rash
http://www.nlm.nih.gov/medlineplus/ency/imagepages/2503.htm
Pityriasis alba
Characterized by a flaky hypopigmented rash, and is more often seen
in school age children, with no known definitive cause. This rash
starts benignly enough, like a case of eczema,
http://www.emedicine.com/emerg/topic425.htm
More from Dr. Greene
http://www.drgreene.com/21_103.html
MedTerms
http://www.medterms.com/script/main/art.asp?ArticleKey=11928
Pityriasis vesicolor
Characterized by brown flaky patches on the neck, arms and trunk,
caused by a fungus, Malassezia furfur, (don?t you love that name!) .
The fungus causes a chemical reaction that inhibits the
pigment-producing skin cells. It is not contagious, and occurs more
often in people who sweat heavily.
http://www.dermnetnz.org/index.html
Internet Health Library
http://www.internethealthlibrary.com/Health-problems/Pityriasis.htm
Images
http://www.dermis.net/doia/diagnose.asp?zugr=d&lang=e&diagnr=111000&topic=t
Pityriasis negra
Affects the palms of the hands with dark brown or black scaly patches.
http://www.dermis.net/doia/diagnose.asp?zugr=d&lang=e&diagnr=110505&topic=i
Pityriasis rotunda
Characterized by circular patchy scales.
http://www.dermis.net/doia/diagnose.asp?zugr=d&lang=e&diagnr=757105&topic=i
Pityriasis Simplex Capillitii
Seen in the scalp and hair of children
http://www.dermis.net/doia/diagnose.asp?zugr=d&lang=e&diagnr=111005&topic=i
Pityriasis lichenoides
Also called Pityriasis lichenoides et varioliformis acuta or PLEVA,
is a rare skin condition, of unknown causes. Per eMedicine, the
disorder ?presents with the abrupt appearance of multiple papules on
the trunk, buttocks, and proximal extremities. Papules rapidly
progress to vesicles and hemorrhagic crusts.?
http://www.emedicine.com/derm/topic334.htm
From MySkin
http://www.myskin.4t.com/
More from Dermnet
http://www.dermnetnz.org/index.html
Hope this helps! If any part of my answer is unclear, please request
an Answer Clarification, before rating. This will enable me to assist
you further, if possible!
Regards,
crabcakes-ga
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