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Camurati-Englemann disease (CED) is a rare, clinically variable bone dysplasia syndrome characterized by hyperostosis of the long bones, skull, spine and pelvis, associated with severe pain in the extremities, a wide-based waddling gait, joint contractures, muscle weakness and easy fatigability.
Features include always present findings: Lower limb pain; and very common findings: Cortical thickening of long bone diaphyses and Sideways curvature of the spine (scoliosis). 28 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Bones and joints | 5 | Cortical thickening of long bone diaphyses, Increased bone density (increased bone mineral density), Bone marrow hypocellularity |
Brain and nerves | 3 | Cranial nerve compression, Waddling gait, Headache |
Arms and legs | 3 | Limb pain, Out-toeing, Lower limb pain |
Muscles | 2 | Muscle weakness, Skeletal muscle atrophy |
Eyes | 2 | Diplopia, Optic nerve compression |
Ears | 1 | Hearing loss (hearing impairment) |
Blood and immune system | 1 | Low red blood cell count (anemia) |
Skin | 1 | Reduced subcutaneous adipose tissue |
Hormones | 1 | Delayed puberty |
Head and neck | 1 | Mandibular prognathia |
Age of onset: adulthood.
Individuals with Camurati-Engelmann disease (CED) present with proximal muscle weakness, poor muscular development, a wide-based, waddling gait, easy fatigability, bone pain, and headaches. The average age of onset of symptoms in the 306 reported individuals is 13.4 years with a range of onset from birth to age 76 years . Table 2. Camurati-Engelmann Disease: Frequency of Select Features
Feature | % of Persons w/Feature | Comment |
|---|---|---|
Proximal muscle weakness | 62%-67% | — |
Wide-based, waddling gait | 48%-79% | — |
TGFB1 function has not been fully characterized.
Camurati-Engelmann disease is associated with mutations in the TGFB1 gene on chromosome 19.
No known correlation exists between the nature of the TGFB1 pathogenic variants and the severity of the clinical or radiographic manifestations .
Source: GeneReviews — "Camurati-Engelmann Disease"
Some obligate heterozygotes with an identified TGFB1 pathogenic variant have had normal radiographs ; an exact penetrance figure is not known.
Source: GeneReviews — "Camurati-Engelmann Disease"
No consensus clinical diagnostic criteria for Camurati-Engelmann disease have been published.
Camurati-Engelmann disease (CED) should be suspected in individuals with the following clinical findings:
Proximal muscle weakness
Easy fatigability
Bone pain primarily affecting the lower extremities
Waddling gait
The clinical diagnosis of CED can be established in a proband with the characteristic radiographic findings or, if radiographic findings are inconclusive, a heterozygous pathogenic (or likely pathogenic) variant in TGFB1 identified by molecular genetic testing .
The clinical diagnosis is based on the following radiographic findings:
Source: GeneReviews — "Camurati-Engelmann Disease"
Few disorders share the clinical and radiographic findings of Camurati-Engelmann disease (CED). The correct diagnosis is made by physical examination and skeletal survey. Table 3. Genes of Interest in the Differential Diagnosis of Camurati-Engelmann Disease
Gene | Disorder | MOI | Features Overlapping w/CED | Features Distinguishing From CED |
|---|---|---|---|---|
COL1A1 | Caffey disease, COL1A1-related | AD | Bone pain, hyperostosis of diaphyses of long bones |
Genetic testing for TGFB1 is available. Testing is considered confirmatory for diagnosis.
No approved treatments are currently available for Camurati-Engelmann disease. An additional 1 compound holds orphan drug designation.
While no drugs are FDA-approved specifically for Camurati-Engelmann disease, some of the following designated compounds may be used off-label in clinical practice. Treatment decisions should be made in consultation with a specialist familiar with this condition.
The following drugs have received orphan drug designation from the FDA for Camurati-Engelmann disease. Orphan designation reflects regulatory interest and does not indicate approval for treatment.
Brand Name | Generic Name | Sponsor | Designated | Exclusivity End | Designation Status |
|---|---|---|---|---|---|
Sodium (1-hydroxy-4-(((2-((4-(2-(pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinolin-7-yl)oxy)ethoxy)carbonyl)amino)butane-1,1-diyl)bis(hydrogen phosphonate) | Sodium (1-hydroxy-4-(((2-((4-(2-(pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinolin-7-yl)oxy)ethoxy)carbonyl)amino)butane-1,1-diyl)bis(hydrogen phosphonate) | Brise Pharmaceuticals Co., Ltd. | 2022 | — | Designated |
No clinical practice guidelines for Camurati-Engelmann disease (CED) have been published.
To establish the extent of disease and needs in an individual diagnosed with CED, the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended.
Table 4.
Camurati-Engelmann Disease: Recommended Evaluations Following Initial Diagnosis
System/Concern | Evaluation | Comment
| Orthopedics/ physical medicine rehab/ PT OT eval to assess for weakness, contractures, bone pain, other musculoskeletal manifestations | To incl assessment of:
Gross motor skills
Mobility, ADL, need for adaptive devices
Need for PT
Complete skeletal survey | Use of whole-body MRI to identify affected areas has been described.1
Serum ESR
Bone scan (scintigraphy) exam
| In those w/acute bone pain to assess disease activity
Excess phosphate. Treatment with cellulose phosphate led to worsening hypocalcemia and proximal myopathy in one individual.
Source: GeneReviews — "Camurati-Engelmann Disease"
Search ClinicalTrials.gov in the US and EU Clinical Trials Register in Europe for access to information on clinical studies for a wide range of diseases and conditions. Note: There may not be clinical trials for this disorder.
Source: GeneReviews — "Camurati-Engelmann Disease"
View trials for Camurati-Engelmann disease
To monitor existing manifestations, the individual's response to supportive care, and the emergence of new manifestations, the evaluations summarized in are recommended. Table 6. Camurati-Engelmann Disease: Recommended Surveillance
System/Concern | Evaluation | Frequency |
|---|---|---|
Musculoskeletal | Assess gross motor skills. | At each visit throughout childhood Assess for mobility issues, weakness, contractures, bone pain, other musculoskeletal manifestations. |
Hearing | Audiology eval for conduction /or sensorineural hearing deficits | Annually BAER CT w/fine cuts through inner ear |
Eyes | Ophthalmology exam to assess for blurred vision, proptosis, papilledema, epiphora, glaucoma | Annually |
Endocrine | Monitor linear growth pubertal development. | At each visit throughout childhood |
Cardiac | Blood pressure | At each visit |
Hematologic | CBC | Annually BAER = brain stem auditory evoked response; CBC = complete blood count; CED = Camurati-Engelmann disease; ESR = erythrocyte sedimentation rate; ICP = intracranial pressure |
Source: GeneReviews — "Camurati-Engelmann Disease"
Phenotype severity distribution: 1 always present feature, 2 very common features, 5 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Camurati-Engelmann disease.
12 publications have been identified in PubMed for Camurati-Engelmann disease. Research spans Case Report / Case Series (50%), Review / Meta-Analysis (17%), and Other (8%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 6 | 50% |
Research summaries | 2 | 17% |
Other research | 1 | 8% |
Laboratory research | 1 | 8% |
Disease patterns and progression | 1 | 8% |
New treatment approaches | 1 | 8% |
Lei C (2026). [PMID: 41949641](https://pubmed.ncbi.nlm.nih.gov/41949641/). *Orbit*. [Case Report / Case Series]
Mumm S (2025). [PMID: 40774839](https://pubmed.ncbi.nlm.nih.gov/40774839/). *Bone*. [Other]
Hassan N (2025). [PMID: 40811023](https://pubmed.ncbi.nlm.nih.gov/40811023/). *Rheumatology (Oxford, England)*. [Gene Therapy / Novel Therapeutics]
Mumm S (2025). [PMID: 40204055](https://pubmed.ncbi.nlm.nih.gov/40204055/). *Bone*. [Case Report / Case Series]
Sangar M (2025). [PMID: 40914927](https://pubmed.ncbi.nlm.nih.gov/40914927/). *Calcified tissue international*. [Review / Meta-Analysis]
Uludağ Alkaya D (2025). [PMID: 40198394](https://pubmed.ncbi.nlm.nih.gov/40198394/). *Calcified tissue international*. [Epidemiology / Natural History]
Peláez P (2025). [PMID: 40513308](https://pubmed.ncbi.nlm.nih.gov/40513308/). *Medicina clinica*. [Case Report / Case Series]
Wang Z (2024). [PMID: 39014191](https://pubmed.ncbi.nlm.nih.gov/39014191/). *Journal of human genetics*. [Basic Science / Preclinical]
Guillen Arguello R (2024). [PMID: 39680872](https://pubmed.ncbi.nlm.nih.gov/39680872/). *Journal of neurosurgery. Case lessons*. [Case Report / Case Series]
Campos T (2024). [PMID: 39596554](https://pubmed.ncbi.nlm.nih.gov/39596554/). *Genes*. [Case Report / Case Series]
Data assembled from 8 of 12 sources · Last updated Sep 19, 2026, 6:54 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
54% |
— |
Bone pain | 68%-100% | — |
Hearing loss | 19%-54% | Sensorineural /or conductive |
Headaches | 25% | Musculoskeletal. Decreased muscle mass and weakness are most apparent in the proximal lower limbs, resulting in difficulty when rising from a sitting position. A wide-based, waddling gait is common. Delayed onset of walking has been reported . Joint contractures occur in 43% of individuals. |
Source: GeneReviews — "Camurati-Engelmann Disease"
FAM111A | Kenny-Caffey syndrome, dominant, FAM111A-related (FAM111A-KCS) (See FAM111A-Related Skeletal Dysplasias.) | AD | Sclerosis of long bones, cortical thickening, medullary stenosis | In FAM111A-KCS: hypocalcemia, hypoparathyroidism, delayed fontanelle closure |
LRP5 | Osteosclerosis, LRP5-related (OMIM 144750) | AD | Diaphyseal sclerosis (endosteal), cranial nerve involvement in some | In LRP5-related osteosclerosis: wide, deep mandible w/ gonial angle (distinct from enlarged mandible found only occasionally in CED) |
LRP6 | Camurati-Engelmann-like disease, LRP6-related1 | AD | Bone pain, periosteal endosteal diaphyseal sclerosis of long bones | In LRP6-related Camurati-Engelmann-like disease: diaphyseal sclerosis of metacarpals; cranial sclerosis spares the cranial vault |
SOST | Craniodiaphyseal dysplasia, SOST-related (SOST-CDD) (OMIM 122860)2 | AD | Diaphyseal sclerosis cranial hyperostosis | Cranial involvement in CED is milder rarely results in frontal bossing proptosis. Choanal stenosis is significant in SOST-CDD. Sclerosis of long bones in CDD is restricted to diaphysis, whereas in CED, metaphyses can also be affected. |
SOST-related sclerosing bone dysplasias (sclerosteosis, SOST-related, endosteal hyperostosis, van Buchem type, SOST-related) | AR | Cranial hyperostosis, cranial nerve involvement, diaphyseal sclerosis | In SOST-related sclerosing bone dysplasias: syndactyly dysplastic or absent nails | — |
SP7 | Craniodiaphyseal dysplasia, SP7-related (SP7-CDD)3 | AR | Cranial hyperostosis, diaphyseal sclerosis | In SP7-CDD: undertubulation of metacarpals, phalanges, long bones; broad ribs clavicles |
TBXAS1 | Hematodiaphyseal dysplasia Ghosal, TBXAS1-related (OMIM 231095) | AR | Diaphyseal sclerosis | Severe anemia; leukopenia thrombocytopenia in TBXAS1-related hematodiaphyseal dysplasia Ghosal |
TNFRSF11B | Osteoectasia w/hyperphosphatasia (juvenile Paget disease), TNFRSF11B-related (OMIM 239000) | AR | Cranial hyperostosis, sensorineural hearing loss, sclerosis of long bones | In juvenile Paget disease: predisposition to fractures bowing of long bones AD = autosomal dominant; AR = autosomal recessive; CED = Camurati-Engelmann disease; MOI = mode of inheritance 1. 2. |
Source: GeneReviews — "Camurati-Engelmann Disease"
| Audiology eval for conduction /or sensorineural hearing deficits | In those w/hearing loss: BAER CT w/fine cuts through inner ear
Eyes | Ophthalmology exam to assess for blurred vision, proptosis, papilledema, epiphora, glaucoma |
| Assess pubertal development for other clinical manifestations of hypopituitarism. |
| Blood pressure | Baseline blood pressu...
Source: GeneReviews — "Camurati-Engelmann Disease"