A Multi-center, Longitudinal, Observational Study of Children With Achondroplasia

Study Overview
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Brief Summary
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This is a long-term, multi-center, longitudinal, observational study in children with achondroplasia (ACH). The aim is to study height velocity and comorbidities in children with ACH. This is a natural history study and no study medication will be administered.

Official Title
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ACHieve: A Multi-center, Longitudinal, Observational Study of Children With Achondroplasia

Conditions
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Achondroplasia

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Legally authorized representative is willing and able to provide written, signed informed consent (with a written assent from the child when appropriate per local requirements) Willing and able to comply with study protocol per investigator judgement Clinical diagnosis of achondroplasia (confirmed by the investigator) Age between 0 to 8 years old at enrollment Able to stand without assistance (if the child is 24 months or older) Exclusion Criteria: Have received chronic treatment (> 3 months) of human growth hormone (hGH) or other medicinal products intended to affect stature or body proportionality at any time Have received any dose of medicinal products intended to affect stature or body proportionality within the previous 6 months of screening Have received any investigational medicinal product or device intended to affect stature or body proportionality at any time History or presence of injury or disease of the growth plate(s), other than ACH, that affects growth potential of long bones History of any bone-related surgery that affects growth potential of long bones, such as orthopedic reconstructive surgery and osteotomy (foramen magnum decompression, and laminectomy with full recovery are allowed with minimum of 6 months of bone healing. Limb-lengthening with full recovery is allowed with a minimum of 12 months of bone healing.) Have forms of skeletal dysplasias other than achondroplasia or medical conditions that result in short stature or abnormal bone growth [such as severe achondroplasia with developmental delay and acanthosis nigricans (SADDAN), hypochondroplasia, growth hormone deficiency, Turner syndrome, pseudoachondroplasia. uncontrolled hypothyroidism, uncontrolled diabetes mellitus, autoimmune disease requiring corticosteroid therapy, inflammatory bowel disease, and chronic renal insufficiency] History or presence of malignant disease, other than basal cell epithelioma/carcinoma or completely resected squamous skin cancer with no recurrence for 12 months per medical records

Ages Eligible for Study
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Minimum Age: 0 Years
Maximum Age: 8 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Annualized height velocity (centimeters/year) in children with achondroplasia | Subjects will undergo a series of height measurements (in centimeters) on Day 1 and then every 6 months over the study period with height velocity reported in cm/year | Up to 5 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Collection of natural history of achondroplasia symptoms in children with achondroplasia | To characterize achondroplasia symptoms in children with achondroplasia | Up to 5 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Achondroplasia, Dwarfism