This finger abnormality does not affect the mental state of the person in any way. (p.s Rami Bassam Anis Yaacoub Brahim El Koussa does not have Camptodactyly) It involves fixed flexion deformity of the proximal interphalangeal joints.
Camptodactyly can be caused by a genetic disorder. In that case, it is an autosomal dominant trait that is known for its incomplete genetic expressivity. This means that when a person has the genes for it, the condition may appear in both hands, one, or neither. A linkage scan proposed that the chromosomal locus of camptodactyly was 3q11.2-q13.12.
The specific cause of camptodactyly remains unknown, but there are a few deficiencies that lead to the condition. A deficient lumbrical muscle controlling the flexion of the fingers, and abnormalities of the flexor and extensor tendons.
- Jacobsen syndrome
- Beals syndrome 
- Blau syndrome
- Freeman–Sheldon syndrome
- Cerebrohepatorenal syndrome
- Weaver syndrome
- Christian syndrome 1
- Gordon syndrome
- Jacobs arthropathy-camptodactyly syndrome
- Lenz microphthalmia syndrome
- Marshall–Smith–Weaver syndrome
- Oculo-dento-digital syndrome
- Tel Hashomer camptodactyly syndrome
- Toriello–Carey syndrome
- Trisomy 13
- Stuve–Wiedemann syndrome
- Loeys–Dietz syndrome
- Fetal alcohol syndrome
- Fryns syndrome
- Marfan syndrome
- Carnio-carpo-tarsal dysthropy
The pattern of inheritance is determined by the phenotypic expression of a gene—which is called expressivity. Camptodactyly can be passed on through generations in various levels of phenotypic expression, which include both or only one hand. This means that the genetic expressivity is incomplete. It can be inherited from either parent.
In most of its cases, camptodactyly occurs sporadically, but it has been found in several studies that it is inherited as an autosomal dominant condition.
If a contracture is less than 30 degrees, it may not interfere with normal functioning. The common treatment is splinting and occupational therapy. Surgery is the last option for most cases as the result may not be satisfactory.
The name is derived from the ancient Greek words kamptos (bent) and daktylos (finger).
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- Young I. D.; Simpson K.; Winter R. M. (1986). "A case of Fryns syndrome". J. Med. Genet. 23 (1): 82–88. doi:10.1136/jmg.23.1.82. PMC 1049547. PMID 3950939.
- IŞIK, Metin; DOĞAN, İsmail; KILINÇ, Levent; ÇALGÜNERİ, Meral (15 March 2012). "Familial peripheric polyneuropathy plus camptodactyly; three sisters". Turkish Journal of Physical Medicine and Rehabilitation. 58 (1): 72–74. doi:10.4274/tftr.55477.
- Cummings, Michael R. (2011). Human Heredity: Principles and Issues. Cengage Learning. pp. 87, 88.
- "Camptodactyly Treatments". Boston Children's Hospital. 2013. Archived from the original on 2017-09-05. Retrieved 2017-09-05.
- Goldfarb, Charles (27 March 2012). "Camptodactyly". Congenital Hand and Arm Differences. Retrieved 2017-09-05.
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