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Inverted follicular keratosis with sebaceoma-like areas: first case report
  1. M D’Agostino,
  2. A Al Habeeb,
  3. D Ghazarian
  1. Department of Laboratory Medicine and Pathobiology, University of Toronto and University Health Network, Toronto, Ontario, Canada
  1. Associate Professor D Ghazarian, Department of Laboratory Medicine and Pathobiology, University of Toronto, University, Health Network, 200 Elizabeth Street, Department of Pathology, 11th Floor, Toronto, Ontario, Canada M5G 2C4; danny.ghazarian{at}

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A solitary raised and scaly nodule excised from the left forehead of an 80-year-old man was received for consultation. Sections of the lesion showed skin with well-delineated endophytic epithelial proliferations centred around hair follicles with inverted papillomatous and acanthotic components containing several circumscribed squamous eddies. There was no atypia, mitotic activity, necrosis or stromal invasion. No peripheral palisading was noted. This lesion was thought to be an inverted …

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  • Competing interests: None.