Persistent pupillary membrane

Infobox_Disease
Name = PAGENAME


Caption =
DiseasesDB =
ICD10 = ICD10|H|21|4|h|15
ICD9 =
ICDO =
OMIM =
MedlinePlus =
eMedicineSubj =
eMedicineTopic =
MeshID =

Persistent pupillary membrane (PPM) is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil. The pupillary membrane in mammals exists in the fetus as a source of blood supply for the lens. It normally atrophies from the time of birth to the age of four to eight weeks.cite book|author=Gelatt, Kirk N. (ed.)|title=Veterinary Ophthalmology|edition=3rd ed.|publisher=Lippincott, Williams & Wilkins|year=1999|id=ISBN 0-683-30076-8] PPM occurs when this atrophy is incomplete. It generally does not cause any symptoms. The strands can connect to the cornea or lens, but most commonly to other parts of the iris. Attachment to the cornea can cause small corneal opacities, while attachment to the lens can cause small cataracts. Using topical atropine to dilate the pupil may help break down PPMs.

In dogs, PPM is inherited in the Basenji but can occur in other breeds such as the Pembroke Welsh Corgi, Chow Chow, Mastiff, and English Cocker Spaniel. It is also rarely seen in cats, horses, and cattle.

References


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • pupillary membrane persistent — a congenital defect in dogs in which remnants of the tunica vasculosa lentis are found on the surface of the iris or cornea, sometimes with a corneal opacity …   Medical dictionary

  • membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m …   Medical dictionary

  • Glaucoma — Classification and external resources Acute angle closure glaucoma of the right eye. Note the mid sized pupil, which was nonreactive to light, and injection of the conjunctiva. ICD 10 …   Wikipedia

  • Nystagmus — Horizontal optokinetic nystagmus, a normal (physiological) form of nystagmus ICD 10 H55, H81.4 …   Wikipedia

  • Leber's congenital amaurosis — Classification and external resources ICD 10 H53.0 ICD 9 362.76 …   Wikipedia

  • Mydriasis — Dilated pupil redirects here. This term also arises in eye examinations. Mydriasis Classification and external resources Pupil dilated for examination by optometrist. ICD 10 …   Wikipedia

  • Argyll Robertson pupil — Classification and external resources ICD 10 A52.1, H58.0 ICD 9 …   Wikipedia

  • Miosis — Not to be confused with meiosis, mitosis, or myositis. Miosis Classification and external resources Slight miosis of the left eye (there is also concurrent partial ptosis on the left, most likely part of Horner s syndrome …   Wikipedia

  • Keratoconus — Classification and external resources The conical cornea that is characteristic of keratoconus ICD 10 H …   Wikipedia

  • Conjunctivitis — Pinkeye redirects here. For the South Park episode, see Pinkeye (South Park). For the 2008 film, see Pink Eye (film). Conjunctivitis Classification and external resources File:Joy pink eye cropped.JPG An eye with viral conjunctivitis. ICD 10 H …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.