AN 80-year-old man presents with a single papule situated on the left lateral canthus.

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<p>AN 80-year-old man presents with a single papule situated on the left lateral canthus.</p><p>On examination, the growth is dome-shaped, non-tender and fluid-filled. Dermatoscopic examination reveals no telangiectasia or rolled borders.</p><p>He is asymptomatic and cannot recall when the lesion first appeared.</p><p>He has a previous history of osteoarthritis and non-melanoma skin cancer, with signs of actinic damage on his arms and legs.</p><p>He takes acitretin 10mg once daily and has regular six-monthly full skin examinations. There are no reported allergies.</p>

Professor Dédée Murrell is head of department, department of dermatology, St George Hospital, Sydney; professor, faculty of medicine, UNSW Sydney; and honorary professorial fellow, the George Institute for Global Health, Sydney.