Musculoskeletal · Chest Wall Disorders
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Hallmark is reproducible, point-tender chest wall pain on palpation of the costochondral junctions, often pleuritic and positional.
It is a benign inflammation of the costochondral/costosternal junctions and a common cause of musculoskeletal chest wall pain.
It is a clinical diagnosis of exclusion made only after ruling out cardiac, pulmonary embolism, and other dangerous causes.
Treatment is supportive with NSAIDs, reassurance, rest, and cough/activity modification; the condition is self-limited.
Tietze syndrome is the variant with visible localized swelling at the costochondral junction.
Reproducible tenderness supports the diagnosis but does NOT by itself exclude acute coronary syndrome or pulmonary embolism.
Unlike cardiac pain it is not exertional in a crescendo pattern and lacks diaphoresis, rest dyspnea, or radiation.
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A 24-year-old woman presents with several days of sharp left anterior chest pain that worsens with deep breathing and movement. She recently had a viral upper respiratory infection with frequent coughing. She has no cardiac risk factors, no dyspnea at rest, and no diaphoresis. On exam, firm palpation over the left second and third costochondral junctions precisely reproduces her pain. ECG and troponin are normal.
Which of the following is the most likely diagnosis?
Costochondritis.
Reproducible point tenderness over the costochondral junctions after vigorous coughing, with a normal ECG and troponin and no cardiac features, is classic for costochondritis. It remains a diagnosis of exclusion, but the benign positional, palpation-reproducible pain in a low-risk young patient supports it once dangerous causes are excluded.
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Etiology / Epidemiology
Benign inflammation of the costochondral/costosternal junctions; a common cause of musculoskeletal chest wall pain that mimics cardiac pain.
Clinical Manifestations
Reproducible, point-tender chest wall pain on palpation, often pleuritic and positional; Tietze syndrome adds visible swelling.
Diagnosis
Diagnosis of exclusion after ruling out cardiac, pulmonary embolism, and other dangerous causes of chest pain.
Treatment
Reassurance, NSAIDs, and rest; the condition is self-limited.
Prognosis
Excellent and self-limited, though pain may recur or persist for weeks.
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Epidemiology & Etiology
Costochondritis is benign inflammation of the costochondral or costosternal cartilage and is a common cause of anterior chest wall pain seen in the ED. It can follow repetitive activity, coughing, minor trauma, or unaccustomed exertion, and frequently has no identifiable trigger. It is an important benign mimic of cardiac ischemia and pulmonary embolism. Tietze syndrome is a related entity distinguished by palpable, often visible swelling of the affected cartilage.
Pertinent Anatomy
The costochondral junctions connect the bony ribs to the costal cartilages, and the costosternal joints connect these cartilages to the sternum. Inflammation typically involves the second through fifth costochondral junctions and reproduces pain on direct palpation of these joints.
Pathophysiology
The exact mechanism is poorly understood but involves localized inflammation of the costal cartilage and its articulations, often provoked by repetitive mechanical stress (severe coughing, exertion) or microtrauma. The inflammation sensitizes the chest wall so that palpation and movement reproduce the patient's pain. There is no systemic inflammatory process in classic costochondritis.
Clinical Manifestations
Patients describe sharp, aching anterior chest pain that is reproducible with palpation of the costochondral junctions, often worsened by deep breathing, coughing, or movement (pleuritic/positional). The pain may be unilateral or multifocal. Unlike cardiac pain, it is not typically exertional in a crescendo pattern and is not associated with diaphoresis, dyspnea at rest, or radiation. Tietze syndrome shows localized swelling.
Diagnosis
Costochondritis is a clinical diagnosis of exclusion. Reproducible chest wall tenderness is supportive but does not by itself exclude serious disease, so dangerous causes (acute coronary syndrome, pulmonary embolism, aortic dissection, pneumothorax, pneumonia) must be considered and excluded based on history, ECG, and risk stratification. No specific lab or imaging finding confirms it.
Treatment
Treatment is supportive: NSAIDs, reassurance, rest, and activity/cough modification. Heat or local measures may help. Most patients need no further intervention; refractory cases may benefit from a local anesthetic/steroid injection. The key clinical task is ensuring the chest pain is genuinely benign before discharge.
Prognosis
Prognosis is excellent and the condition is self-limited, though discomfort may persist for several weeks and recur. Reassurance is a central component of management given the anxiety provoked by chest pain.
Differential Diagnosis
Acute coronary syndrome: exertional pressure-like pain, ECG changes, elevated troponin; not reproducible on palpation.
Pulmonary embolism: pleuritic pain with dyspnea, tachycardia, hypoxia, and VTE risk factors.
Rib fracture: focal bony tenderness with antecedent trauma and positive imaging.
Herpes zoster: dermatomal pain preceding a vesicular rash.
Pleuritis/pneumonia: fever, productive cough, pleural rub, infiltrate on chest X-ray.