Trismus-pseudocamptodactyly syndrome

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Trismus-pseudocamptodactyly syndrome

ORPHA:3377Malformation syndrome

Also called Distal arthrogryposis type 7 · Dutch-Kentucky syndrome · Hecht syndrome · Hecht-Beals syndrome

What it is

A rare, genetic, distal arthrogryposis characterized by pseudocamptodactyly, mild foot deformities, moderately short stature, and short muscles and tendons resulting in a limited range of motion of the hands, legs, and mouth, the later presenting with trismus.

Key facts

Age of onset
Infancy, Neonatal
Inheritance
Autosomal dominant
Classified as
Malformation syndrome

Signs and symptoms

Very common80–99%

4

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

Gene

MYH8Disease-causing germline mutation(s)

ICD-10 codes

Q68.8filed under a broader ICD-10 category — shared with 29 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Cross-references

GARD 2621MESH C535857MONDO 0008016OMIM 158300UMLS C0265226

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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