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Start free with EleplanChildhood-onset hypophosphatasia
ORPHA:247667Clinical subtype
Also called Childhood-onset Rathbun disease · Childhood-onset phosphoethanolaminuria
What it is
A rare, moderate form of hypophosphatasia (HPP) characterized by onset after six months of age and widely variable clinical features from low bone mineral density for age, to unexplained fractures, skeletal deformities, and rickets with short stature and waddling gait.
Key facts
- Age of onset
- Childhood, Infancy
- Inheritance
- Autosomal dominant, Autosomal recessive
- Classified as
- Clinical subtype
Recorded for the broader condition
- Prevalence
- <1 / 1 000 000 (China)Hypophosphatasia
Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.
Gene
ICD-10 codes
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.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
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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