Blepharophimosis, ptosis, and epicanthus inversus syndrome
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Blepharophimosis, ptosis, and epicanthus inversus syndrome (BPES) is a condition that mainly affects development of the eyelids. People with this condition have a narrowing of the eye opening (blepharophimosis), droopy eyelids (ptosis), and an upward fold of the skin of the lower eyelid near the inner corner of the eye (epicanthus inversus). In addition, there is an increased distance between the inner corners of the eyes (telecanthus). Because of these eyelid abnormalities, the eyelids cannot open fully, and vision may be limited.
Descrizione
Blepharophimosis, ptosis, and epicanthus inversus syndrome (BPES) is a condition that mainly affects development of the eyelids. People with this condition have a narrowing of the eye opening (blepharophimosis), droopy eyelids (ptosis), and an upward fold of the skin of the lower eyelid near the inner corner of the eye (epicanthus inversus). In addition, there is an increased distance between the inner corners of the eyes (telecanthus). Because of these eyelid abnormalities, the eyelids cannot open fully, and vision may be limited.
Other structures in the eyes and face may be mildly affected by BPES. Affected individuals are at an increased risk of developing vision problems such as nearsightedness (myopia) or farsightedness (hyperopia) beginning in childhood. They may also have eyes that do not point in the same direction (strabismus) or "lazy eye" (amblyopia) affecting one or both eyes. People with BPES may also have distinctive facial features including a broad nasal bridge, low-set ears, or a shortened distance between the nose and upper lip (a short philtrum).
There are two types of BPES, which are distinguished by their signs and symptoms. Both types I and II include the eyelid malformations and other facial features. Type I is also associated with an early loss of ovarian function (primary ovarian insufficiency) in women, which causes their menstrual periods to become less frequent and eventually stop before age 40. Primary ovarian insufficiency can lead to difficulty conceiving a child (subfertility) or a complete inability to conceive (infertility).
Modelli di ereditarietà
The source lists the following possible inheritance patterns: Autosomal dominant. More than one pattern can apply in different cases.
Related genes
Altri nomi
Blepharophimosis syndrome
Blepharophimosis, ptosis, and epicanthus inversus
BPES
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Ulteriori letture e riferimenti
- Blepharophimosis, ptosis, and epicanthus inversus syndrome; MedlinePlus, National Library of Medicine.
- Allen CE, Rubin PA. Blepharophimosis-ptosis-epicanthus inversus syndrome (BPES): clinical manifestation and treatment. Int Ophthalmol Clin. 2008 Spring;48(2):15-23. doi: 10.1097/IIO.0b013e3181694eee. No abstract available.
- Beysen D, De Jaegere S, Amor D, Bouchard P, Christin-Maitre S, Fellous M, Touraine P, Grix AW, Hennekam R, Meire F, Oyen N, Wilson LC, Barel D, Clayton-Smith J, de Ravel T, Decock C, Delbeke P, Ensenauer R, Ebinger F, Gillessen-Kaesbach G, Hendriks Y, Kimonis V, Laframboise R, Laissue P, Leppig K, Leroy BP, Miller DT, Mowat D, Neumann L, Plomp A, Van Regemorter N, Wieczorek D, Veitia RA, De Paepe A, De Baere E. Identification of 34 novel and 56 known FOXL2 mutations in patients with Blepharophimosis syndrome. Hum Mutat. 2008 Nov;29(11):E205-19. doi: 10.1002/humu.20819.
- Beysen D, De Paepe A, De Baere E. FOXL2 mutations and genomic rearrangements in BPES. Hum Mutat. 2009 Feb;30(2):158-69. doi: 10.1002/humu.20807.
- Beysen D, Raes J, Leroy BP, Lucassen A, Yates JR, Clayton-Smith J, Ilyina H, Brooks SS, Christin-Maitre S, Fellous M, Fryns JP, Kim JR, Lapunzina P, Lemyre E, Meire F, Messiaen LM, Oley C, Splitt M, Thomson J, Van de Peer Y, Veitia RA, De Paepe A, De Baere E. Deletions involving long-range conserved nongenic sequences upstream and downstream of FOXL2 as a novel disease-causing mechanism in blepharophimosis syndrome. Am J Hum Genet. 2005 Aug;77(2):205-18. doi: 10.1086/432083. Epub 2005 Jun 16.
- Choi KH, Kyung S, Oh SY. The factors influencing visual development in blepharophimosis-ptosis-epicanthus inversus syndrome. J Pediatr Ophthalmol Strabismus. 2006 Sep-Oct;43(5):285-8. doi: 10.3928/01913913-20060901-03.
- D'haene B, Nevado J, Pugeat M, Pierquin G, Lowry RB, Reardon W, Delicado A, Garcia-Minaur S, Palomares M, Courtens W, Stefanova M, Wallace S, Watkins W, Shelling AN, Wieczorek D, Veitia RA, De Paepe A, Lapunzina P, De Baere E. FOXL2 copy number changes in the molecular pathogenesis of BPES: unique cohort of 17 deletions. Hum Mutat. 2010 May;31(5):E1332-47. doi: 10.1002/humu.21233.
- Dipietromaria A, Benayoun BA, Todeschini AL, Rivals I, Bazin C, Veitia RA. Towards a functional classification of pathogenic FOXL2 mutations using transactivation reporter systems. Hum Mol Genet. 2009 Sep 1;18(17):3324-33. doi: 10.1093/hmg/ddp273. Epub 2009 Jun 10.
- Taylor A, Strike PW, Tyers AG. Blepharophimosis-ptosis-epicanthus inversus syndrome: objective analysis of surgical outcome in patients from a single unit. Clin Exp Ophthalmol. 2007 Apr;35(3):262-9. doi: 10.1111/j.1442-9071.2006.01448.x.
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