RT Journal Article SR Electronic T1 Lesson of the month 1: A rash decision JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 206 OP 207 DO 10.7861/clinmedicine.15-2-206 VO 15 IS 2 A1 Catherine L Sedgwick A1 Peter E Hall A1 Abarna Ratnarajah A1 Janakan Natkunarajah A1 Louise Hogh YR 2015 UL http://www.rcpjournals.org/content/15/2/206.abstract AB Cellulitis is a common condition and several mimics exist which should be considered in patients who fail to respond to antibiotics. We describe the case of a patient with anaplastic large cell lymphoma masquerading as a lower leg cellulitis. The patient had failed to respond to intravenous antibiotics and a skin biopsy confirmed her diagnosis. She received radical radiotherapy to the lower leg but later developed shortness of breath and was identified to have pulmonary infiltration of the lymphoma. She died shortly afterwards from lobar pneumonia. This case highlights the importance of regularly reassessing patients with suspected cellulitis and considering alternative diagnoses in cases that fail to respond to treatment.