PT - JOURNAL ARTICLE AU - Richards, Claire Elaine AU - Mostafa, Ahmed Mamdouh Taha AU - Elmoheen, Amr TI - Chest wall mass: what lies beneath? AID - 10.1136/emermed-2018-207503 DP - 2018 Oct 01 TA - Emergency Medicine Journal PG - 586--586 VI - 35 IP - 10 4099 - http://emj.bmj.com/content/35/10/586.short 4100 - http://emj.bmj.com/content/35/10/586.full SO - Emerg Med J2018 Oct 01; 35 AB - Clinical introduction A 24-year-old Filipino man attended the ED with a 1-month history of a discrete swelling over his upper anterior chest wall that was rapidly increasing in size and tenderness. He denied any other symptoms. His medical history was unremarkable.Examination revealed a tender, 7 cm × 6 cm mass over the upper part of the sternum (figure 1). The surface was smooth, it was immobile, non-compressible and the overlying skin was normothermic but mildly erythematous. Cervical lymphadenopathy was present. His vital signs were normal.Figure 1 Chest wall mass.Question What is the most likely diagnosis?LipomaChondrosarcomaLymphoma Mycobacterium tuberculosis (TB)Question