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A 48-year-old woman without a significant medical history was referred to our department after the neurologist established Pancoast's syndrome and a well-demarcated homogenous mass in the apex of the right hemithorax on MRI study of the brachial plexus. The tumour was invading the thoracic wall, adjacent musculature and the right plexus brachialis and extended into the neuroforamen of C7–T1 (figure 1B,D). She had no respiratory complaints. She had quit smoking 25 years ago and had a smoking history of only five cigarettes daily for 4 years. A PET-CT scan with 18F-fluorodeoxyglucose (FDG) showed slightly increased FDG uptake (maximal standardised uptake value 4.9) without evidence of metastatic disease. The CT images showed evident destruction of the first rib on the right side (figure 1C). Histological examination of a CT-guided transthoracic needle biopsy revealed a monotonous population of small blue round cells with diffuse membranous staining for CD99 (figure 2). After demonstration of a translocation for the EWS gene by fluorescence in situ hybridisation, a diagnosis of an Ewing's sarcoma of the first rib was made.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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