E76.21
Morquio mucopolysaccharidoses
Clinical Classification Guidelines
Medical Intelligence & Overview
Morquio mucopolysaccharidoses, also known as Morquio syndrome, is a rare inherited disorder that affects how the body breaks down certain complex sugars called mucopolysaccharides. This condition is caused by a deficiency of specific enzymes needed to degrade these substances, resulting in their accumulation in different tissues and organs. The buildup primarily impacts bones, cartilage, and connective tissues, leading to various physical abnormalities and health issues. Recognizing and managing Morquio syndrome early can improve quality of life and address some of its complications.
Causes & Symptoms
Clinical Causes: Inherited genetic mutations affecting specific enzymes responsible for breaking down mucopolysaccharides. Passing of mutated genes from parents to children, following an autosomal recessive pattern.
Key Symptoms: Short stature and a characteristic abnormal bone growth pattern. Spinal abnormalities, including curvature of the spine (kyphosis or scoliosis). Joint hypermobility and limited mobility in certain areas. Distinct facial features such as a prominent forehead and flattened nasal bridge. Dental issues like misaligned or crowded teeth. Respiratory problems due to airway narrowing. Hearing loss caused by middle ear effusion or nerve involvement. Corneal clouding leading to vision impairment. Cardiac concerns including valve abnormalities.
Diagnostic & Treatment
Diagnosis Path: Diagnosis involves a combination of clinical evaluation, genetic testing, and laboratory assessments. Enzyme activity tests measure levels of specific enzymes in blood or tissue samples. Genetic testing can identify mutations associated with Morquio syndrome. Imaging studies, such as X-rays and MRI scans, help evaluate bone deformities and organ involvement, supporting a comprehensive diagnosis.
Treatment Protocols: Enzyme replacement therapy (ERT) to supplement deficient enzymes and reduce mucopolysaccharide buildup. Surgical interventions to correct skeletal abnormalities, such as spinal stabilization or limb lengthening. Physical therapy to maintain joint mobility and muscle strength. Supportive care for respiratory, cardiac, and vision issues. Regular monitoring for potential complications to enable prompt intervention.
Clinical Advice & FAQs
Billing Guidance
Is E76.21 a billable ICD-10 code?
Yes, E76.21 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E76.21?
Clinical documentation must specify the nature of Morquio mucopolysaccharidoses and any associated comorbidities for accurate reporting.
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