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Objectives  Patients presenting with digital upper limb ischaemia are occasionally referred to rheumatology services to rule out vasculitis. We aimed to present two cases of delayed diagnosis of arterial thoracic outlet syndrome (aTOS) in middle-aged patients presenting with digital ischaemia in order to raise awareness of this important pathology that requires timely surgical intervention.    Methods  Two cases of progressive ischaemia of the right upper extremity caused by primarily undiagnosed compression of the subclavian artery by an accessory cervical rib are presented. The case notes, radiological images, intra-operative and postoperative findings for both patients were reviewed. Patients were followed up after ≥6 months to assess prognosis.    Results  Both patients had a working diagnosis of Buerger’s disease and had been treated with prostaglandin infusions before establishment of the diagnosis of arterial thoracic outlet syndrome. Both patients were heavy smokers, and one patient had bilateral symptoms and a history of axial SpA and positive HLA-B27. Late presentation in one patient led to the loss of three fingers and the need for plastic reconstructive surgery after cervical rib resection and revascularization. In the other patient, surgical thrombectomy of the upper limb arteries along with resection of a cervical rib and repair of the subclavian artery with an interposition graft were necessitated to heal digital ulcers successfully.    Conclusion  A high index of suspicion of aTOS should be maintained in middle-aged patients presenting with digital or upper limb ischaemia even in the presence bilateral symptoms or relevant risk factors of other diagnoses, such as smoking or a positive rheumatological history.

Digital ischaemia of the upper limbs in middle age: consider arterial thoracic outlet syndrome until proven otherwise!