Mucopolysaccharidosis Mps Iii B C0086648
A rare inherited condition where harmful substances accumulate in the brain, leading to progressive intellectual decline and behavioral changes. Children typically develop normally at first, then lose previously acquired skills. Care is supportive and addresses specific symptoms.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Developmental regression
(nervous system)Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Hyperactivity
(psychiatric)Recurrent ear infections
(ear)Hepatosplenomegaly
(gastrointestinal)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Drug therapy with clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Neurobehavioral Intervention Program
Comprehensive behavioral support addressing hyperactivity, sleep disorders, and anxiety through structured environmental modifications and therapeutic interventions. Family education and respite services are integral components.
Symptomatic Medication Management
Pharmacological treatment of specific symptoms including sleep aids for circadian rhythm disturbances, anti-epileptic drugs for seizure control, and medications for anxiety or agitation management.
Additional treatment options
Therapeutic Exercise and Positioning
Structured physical therapy program focusing on maintaining joint flexibility, preventing contractures, and supporting functional mobility. Includes gentle stretching, positioning to prevent skin breakdown, and safe transfer techniques.
physical_therapyComprehensive Disease Surveillance
Regular multidisciplinary evaluation of neurological status, developmental level, cardiac function, and respiratory status. Document disease progression to guide care planning and family counseling.
monitoringInvestigational Therapy Access
Facilitated access to emerging therapies through clinical trials evaluating gene therapy, enzyme replacement, and novel small molecule approaches for MPS III-b.
complementaryMedication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy