Q78.6
Multiple congenital exostoses
Clinical Classification Guidelines
Inclusion Terms
- Diaphyseal aclasis
Medical Intelligence & Overview
Multiple congenital exostoses, also known as diaphyseal aclasis, is a genetic condition characterized by the development of multiple benign bone growths called exostoses or osteochondromas. These growths typically form near the growth plates of long bones and can vary in size and number. Although generally benign, they may cause physical deformities, restricted movement, or other complications depending on their location and size. Recognizing this condition early can help in managing potential issues and monitoring for any changes over time.
Causes & Symptoms
Clinical Causes: Inherited genetic mutations, primarily involving the EXT1 and EXT2 genes. Autosomal dominant inheritance pattern, meaning only one copy of the altered gene inherited from an affected parent can cause the condition. Possible sporadic cases where no family history is present, but these are less common.
Key Symptoms: Presence of multiple bony growths, often around the metaphysis of long bones such as the femur, tibia, and humerus. Visible or palpable lumps beneath the skin, which may be hard and fixed. Bone deformities or asymmetry in affected limbs. Limited joint movement if exostoses involve the joints or their vicinity. Pain or tenderness in areas over the exostoses, especially if they press against nearby tissues or nerves. Potential for fractures or complications if exostoses cause mechanical stress to bones.
Diagnostic & Treatment
Diagnosis Path: Diagnosis typically involves a combination of clinical evaluation and imaging tests. Key steps include: - Physical examination to identify bumps or deformities. - X-rays to visualize the locations, sizes, and number of osteochondromas. - MRI or CT scans may be employed to assess the extent of the growths and their relation to surrounding tissues. - Genetic testing can confirm mutations in the EXT genes, especially in ambiguous cases or family planning considerations. - Regular follow-up assessments to monitor for growth changes or signs of complications.
Treatment Protocols: Management of multiple congenital exostoses depends on the severity and associated symptoms. Common approaches include: - Observation and regular monitoring for changes in size, number, or symptoms. - Surgical removal of exostoses if they cause pain, restrict movement, compress nerves or blood vessels, or lead to deformity. - Physical therapy to maintain joint function and mobility. - Addressing any resultant deformities with orthopedic interventions as needed. - Educating patients and families about the hereditary nature and possible complications of the condition. In most cases, conservative management suffices, and surgical intervention is reserved for problematic exostoses or deformities.
Clinical Advice & FAQs
Billing Guidance
Is Q78.6 a billable ICD-10 code?
Yes, Q78.6 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report Q78.6?
Clinical documentation must specify the nature of Multiple congenital exostoses and any associated comorbidities for accurate reporting.
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