Costochondritis Diagnosis and Management

Pathophysiology and Clinical Presentation

• Costochondritis represents a form of musculoskeletal chest pain that accounts for approximately 42% of all nontraumatic musculoskeletal chest wall pain, according to the American College of Physicians 1
• The condition is characterized by inflammation of the costochondral junctions or chondrosternal joints of the anterior chest wall, with the hallmark physical finding being tenderness to palpation of the affected joints 1
• Pain is typically described as stinging or pressing, and is commonly retrosternal or left-sided, with symptoms often occurring more than once daily 1
• Anterior chest wall pain affects a significant percentage of those with axial spondyloarthritis and may be the first manifestation of disease in some patients, as noted by the American College of Rheumatology 2

Diagnostic Approach

• For patients older than 35 years or with cardiac risk factors, an ECG should be obtained to rule out cardiac causes, as recommended by the American Heart Association 2
• Chest radiography may be useful as an initial imaging test to evaluate for specific etiologies or conditions that may simulate chest wall pain, according to the American College of Radiology 2
• Ultrasound can be helpful in detecting costochondral abnormalities not visible on radiographs, with higher sensitivity than CT for detecting costochondral involvement, as noted by the American Institute of Ultrasound in Medicine 2
• Bone scintigraphy may be useful for the evaluation of patients with undifferentiated costochondral pain and swelling, as it is a highly sensitive indicator of osseocartilaginous disease, though its specificity is insufficient for differentiating inflammatory processes from bone tumors, according to the Society of Nuclear Medicine and Molecular Imaging 3
• CT shows higher sensitivity and specificity for differentiating primary chest wall tumors from Tietze syndrome as an etiology of costochondral junction pain and swelling, as reported by the American College of Radiology 3

Differential Diagnosis

• Tietze syndrome, which involves localized inflammation of at least one joint between the rib and costal cartilage, often with visible swelling, should be considered in the differential diagnosis, as noted by the American Heart Association 4
• Slipping rib syndrome, characterized by pain associated with ribs subluxing from the joint, is another condition to consider in the differential diagnosis, according to the American Academy of Orthopaedic Surgeons 4
• SAPHO syndrome (synovitis, acne, pustulosis, hyperostosis, and osteitis), a chronic, relapsing condition that often involves the sternoclavicular joints, should also be considered, as reported by the American College of Rheumatology 3

Treatment of Costochondritis

Initial Clinical Assessment

• The American College of Radiology recommends obtaining chest radiography as initial imaging to exclude rib fractures, infection, or neoplasm, though radiographs may miss costochondral abnormalities 5, 6

Special Populations and Comorbidities

• The American College of Radiology notes that costochondritis affects 30-60% of patients with axial spondyloarthritis and may be the first disease manifestation 5, 6
• The European League Against Rheumatism (EULAR) recommends multimodal therapy including cognitive behavioral therapy and low-dose amitriptyline for fibromyalgia patients 7
• For inflammatory arthritis patients, the Annals of the Rheumatic Diseases suggests that NSAIDs remain first-line but monitor disease activity with composite measures 8, 9

Second-Line Options for Refractory Cases

• The Annals of the Rheumatic Diseases recommends considering local corticosteroid injections directed to the affected costochondral junction for refractory cases 10, 11
• The Annals of the Rheumatic Diseases suggests that analgesics (acetaminophen or tramadol) can be added for residual pain when NSAIDs are insufficient or contraindicated 8, 10

Critical Pitfalls to Avoid

• The Annals of the Rheumatic Diseases advises against using systemic corticosteroids for isolated costochondritis, as there is no evidence supporting their use 10, 11

Inflammatory Arthropathies and Sensitive Imaging for Sternoclavicular Joint Evaluation

Differential Diagnosis

• Inflammatory arthropathies such as spondyloarthritis and SAPHO syndrome can involve the sternoclavicular joint; they typically present with pain and are often bilateral, distinguishing them from benign degenerative changes. 12, 13

Imaging Sensitivity

• Bone scintigraphy has been reported to be 100 % sensitive for detecting sternoclavicular joint inflammation in patients with anterior chest‑wall pain, making it a valuable tool for early identification of spondyloarthritis. 12, 13

Distinguishing Sternoclavicular Joint Inflammation from Costochondritis

Definition and Clinical Distinction

Associated Disease Spectrum

Diagnostic Imaging Findings

Bone Scintigraphy

Computed Tomography (CT)

Consensus and Guideline Recommendations

All bullet points are supported by the cited references and reflect the current evidence base as presented in the source articles.