PT - JOURNAL ARTICLE AU - Shanmugathas, Nimlan AU - Rajwani, Kapil Mohan AU - Dev, Shumontha TI - Pancoast tumour presenting as shoulder pain with Horner’s syndrome AID - 10.1136/bcr-2018-227873 DP - 2019 Jan 01 TA - BMJ Case Reports PG - bcr-2018-227873 VI - 12 IP - 1 4099 - http://casereports.bmj.com/content/12/1/bcr-2018-227873.short 4100 - http://casereports.bmj.com/content/12/1/bcr-2018-227873.full SO - BMJ Case Reports2019 Jan 01; 12 AB - A 54-year-old man presented to the emergency department with a 4-week history of right shoulder pain radiating down his arm, with some associated sensory loss. Further questioning and examination in the department revealed a classical Horner’s syndrome; miosis, partial ptosis and hemifacial anhidrosis. An initial chest X-ray was deemed to be unremarkable; however, further review by a radiologist noted asymmetrical right apical thickening. A subsequent high-resolution CT scan of the chest revealed a right-sided Pancoast tumour. This case highlights the importance of a thorough history and examination in identifying a rare cause of shoulder and/or back pain.