case_images: PMC3676989_01
case_images: CT petrous bones axial image showing left middle ear soft-tissue mass.
case_images: CRIM.OTOLARYNGOLOGY2013-259726.001.jpg
case_images: PMC3676989_01_CRIM.OTOLARYNGOLOGY2013-259726.001.jpg
case_images: fig1
case_images: He also subsequently had a CT of his petrous temporal bones, as represented in Figure 1, which showed a 1.7 x 1.4 cm expansile soft-tissue mass within the lateral aspect of left middle ear and superior mastoid, prolapsing into external ear canal and associated with destruction of tegmen tympani, scutum, and the roof of the external ear canal; the mass was also seen to abut onto the ossicles but did not cause any ossicular erosion.
case_images: CD1a immunohistochemical stain highlighting the Langerhans cells (x20).
case_images: CRIM.OTOLARYNGOLOGY2013-259726.002.jpg
case_images: PMC3676989_01_CRIM.OTOLARYNGOLOGY2013-259726.002.jpg
case_images: fig2
case_images: Langerhans' cells. Langerhans' cells are also labelled with S100 and CD1a (Figure 2).