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Congenital Abnormalities

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Polydactyly » Fingers Q69.-

Definition:

Polydactyly:
Extra finger / s and / or toe / s.
Specify: "Affected Limbs(Hand and / or foot. Right, Left, Bilateral) and duplicated Digit, (in which the extra digit is implanted: 1, 2, 3, 4, 5 º).
- In the description of the duplication of the 1st digit, clarify if it is referred to Thumb or Hallux, although that seems redundant, in order to avoid confusion of 1st with the 5 th digit, depending on where you start counting.
- Refer to the phalanges as proximal, middle or distal and not as 1st, 2nd or 3rd.
Polydactyly, Incomplete duplication.
The extra digit is not completely separated from the extra digit.
It is often erroneously called poly-syndactyly, in which fusion should not involve only the duplicated with the extra digits.
Notes:
In regions with predominantly african black ethnicity, the most frequent polydactylies are duplications of the fifth finger or toe, while in regions with predominantly native ethnicity, the most frequent polydactylies are duplications of the first digit: thumb or hallux.
Duplications of the other digits, 2, 3 or 4 are very rare and often may only be due to wrong descriptions.
Polydactyly, Incomplete duplication.
A partial or incomplete duplication [Q69.-] must not be mistaken for polysyndactyly [Q70.4]. In the latter, the syndactyly does not only involve the extra finger but at least two normal digital rays. To avoid confusion, do not write polysyndactyly, which is a very rare defect.
Images:
Image 1
Partial or incomplete duplication of the 5th toe.
Image 2
Photo
1. Postaxial polydactyly type B. Extra finger, pedunculated and necrotic due to torsion of the attaching pedicule.
2. Postaxial polydactyly type B. Extra, pedunculated finger.
3. Postaxial polydactyly type B. Extra finger, with one phalanx and nail.
4. Postaxial polydactyly type A: Extra finger, complete and articulated, although hypoplastic.
Image 3
Photo
1. Extra finger, pedunculated and necrotic due to torsion of the attaching pedicule.
2. Extra finger, pedunculated, without nail.
3. Extra finger, pedunculated, with nail.
4. Extra finger, pedunculated, with nail.
Image 4
3 cases with partial hallux duplication. Should not be called polysyndactyly.
Image 5
4 cases with 5th toe duplication.
Image 6
Photo
1. Foot with high degree of duplication, with 8 toes with mirror-like distribution and absence of hallux.
2. Foot with 7 toes due to duplication of the 1st and 5th.

Notes:

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Images