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A young man in his early 30s presented with a 3-day history of left upper arm swelling and erythema (figure 1). He had no significant medical history. Of note he had a strong family history of deep venous thrombosis (DVT) with both parents having had lower limb DVTs. D-dimers were elevated, and the remaining laboratory investigations were within normal limits.
An upper limb Doppler ultrasound scan showed occlusive thrombus in the left subclavian vein (figure 2). A CT venogram further delineated the extent of the thrombus confirming the diagnosis of Paget Schroetter syndrome (figures 3 and 4). Subsequently, a conventional venogram was performed in conjunction with a therapeutic pharmacomechanical thrombectomy, which successfully restored flow in the left subclavian vein (figures 5 and 6).
Paget Schroetter syndrome, also known as effort thrombosis, is an uncommon disorder resulting in spontaneous subclavian venous thrombosis. Generally, it occurs in young and healthy adults.1 The subclavian vein is vulnerable to thrombosis due to its positioning relative to the first rib and clavicle.1
Signs of upper limb DVT should be investigated by Doppler ultrasound scan. However, if thrombosis is present within the non-compressible region of the clavicle, ultrasound may be falsely negative.2 MR or CT venogram is recommended if index of suspicion is high after a negative Doppler ultrasound scan.2
Management options include preadministration of thrombolytics prior to mechanical aspiration in interventional radiology as in this case or therapeutic anticoagulation for 3–6 months.3 Thrombosis may recur in up to a third of patients if the predisposing venous impingement is not addressed. Surgical decompression of the subclavian vein is often performed to this end, for example, excision of the first rib.1 One study followed 50 patients who received thrombolysis followed by anticoagulation and no surgical intervention. Interestingly, it found that 82% of patients were asymptomatic at 57 months post-thrombolysis.1
Paget Schroetter syndrome is rare but should be ruled out in young patients presenting with signs and symptoms of upper limb deep venous thrombosis.1 Repetitive strain and subsequent subclavian vein impingement is thought to be the underlying aetiology.
Doppler ultrasound scan can be falsely negative if thrombosis is present within the non-compressible region of the clavicle.2 If there is persistent clinical concern, a CT or MR venogram should be performed.
Catheter-directed pharmacomechanical thrombectomy is usually successful if initiated within 14 days of thrombus formation.1 Post-thrombolytic surgical decompression of the subclavian vein is often performed to prevent future thrombosis; however, certain patients may remain symptom-free without surgical intervention.1
Contributors JWR acquired and formatted images; submitted report, edited and added to body of text. AM wrote initial body of text draft. SW acquired patient consent, clinical information and image of patient. VR is Senior author and reviewed and approved the manuscript prior to submission.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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