A18.0
Tuberculosis of bones and joints
Clinical Classification Guidelines
Medical Intelligence & Overview
Tuberculosis of bones and joints, also known as osteoarticular tuberculosis, is a form of tuberculosis that affects the bones and the joints. It is caused by the bacteria Mycobacterium tuberculosis, the same organism responsible for pulmonary TB. This condition can develop when the bacteria spread from the lungs through the bloodstream or lymphatic system to other parts of the body, including bones and joints. Although less common than pulmonary tuberculosis, osteoarticular TB can cause significant pain, swelling, and disability if not diagnosed and treated promptly.
Causes & Symptoms
Clinical Causes: Spread of Mycobacterium tuberculosis from primary infection in the lungs Hematogenous dissemination where bacteria enter the bloodstream and reach bones and joints Weak immune system that cannot contain the bacteria Close contact with someone with active tuberculosis
Key Symptoms: Persistent joint pain and swelling Reduced joint mobility Localized tenderness over affected bones or joints Chronic and gradual onset of symptoms Possible fever and night sweats Weight loss and general malaise in advanced cases
Diagnostic & Treatment
Diagnosis Path: Diagnosis often involves a combination of clinical evaluation, imaging studies such as X-rays or MRI, and laboratory tests. A definitive diagnosis can be made through microbiological examination of tissue or fluid samples obtained from the affected site. Tuberculin skin tests or blood tests for tuberculosis exposure may support the diagnosis, although they are not specific. Biopsies revealing granulomatous inflammation with caseous necrosis are characteristic of TB.
Treatment Protocols: Treatment typically involves prolonged courses of multiple antibiotics specifically targeting Mycobacterium tuberculosis. The usual treatment duration ranges from 9 to 12 months, depending on the severity and response. Examples of first-line medications include isoniazid, rifampicin, ethambutol, and pyrazinamide. Surgical intervention may be necessary in cases with extensive bone destruction or to drain abscesses. Rest, immobilization, and supportive care can help manage symptoms and prevent further damage.
Clinical Advice & FAQs
Billing Guidance
Is A18.0 a billable ICD-10 code?
Yes, A18.0 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report A18.0?
Clinical documentation must specify the nature of Tuberculosis of bones and joints and any associated comorbidities for accurate reporting.
Cite this Clinical Reference