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Congenital Abnormalities

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Polysyndactyly and Synpolydactyly » Fingers Q70.4


Poly [Q69 .-] and Syn [Q70 .-] dactyly on the same limb.
If at different limbs of the same person, code Poly [Q69 .-] and Syn [Q70 .-] dactiylies separately
SYNPOLYDACTYLY: Defined as syndactyly of fingers 3 and 4 of the hand and/or toes 4 and 5, with an extra finger implanted in the fusion of the digits.
The diagnosis of polysyndactyly differs from that of synpolydactyly. It is, however, advisable to use the same code Q70.4 for both, to facilitate their retrieval from the databases.
SYNPOLYDACTYLY: A rare monogenic autosomal dominant anomaly, {OMIM 186000}. As ICD10 lacks an adequate code, it is recommended to use the same code Q70.4 as polysyndactyly.
Image 1
(Photo and X-ray)
Right hand with duplication of first proximal phalanx of third finger and fusion between distal phalanges of extra finger and fourth finger. Which means syndactyly of fingers 3 and 4 and extra finger included in the syndactyly.
Image 2
(Clinical picture)
Partial duplication of finger 3 with fenestrated syndactyly and separate nails of fingers 2-3 and extra-4. It can either be considered as a synpolydactyly or as a duplication of finger 3 with disruptive fusions, despite absence of band-like scars.