Fig. 1From: Pediatric Langerhans cell histiocytosis of the temporal bone: clinical and imaging studies of 27 casesAxial HRCT of the temporal bone shows the five regions used to categorize the lesion (mastoid process: long arrow in a; petrous apex: star in a; squamas: arrowhead in a; external auditory canal: star in b; middle ear: long arrow in bBack to article page