case_images: PMC5726703_01
case_images: Red, dome-shaped and firm nodule on the left cheek
case_images: abd-92-05-s1-0135-g01.jpg
case_images: PMC5726703_01_abd-92-05-s1-0135-g01.jpg
case_images: f1
case_images: Physical examination revealed a red, dome-shaped and firm nodule of 13x13 mm in size on the left cheek (Figure 1).
case_images: Dense nodular and diffuse dermal lymphocytic infiltrate, separated from
  the epidermis by a grenz zone, and admixed with numerous histiocytes and
  dendritic cells surrounding the pilosebaceous units. A -
  Hematoxylin-eosin, original magnification x 40. B -
  Hematoxylin- eosin, original magnification x 100
case_images: abd-92-05-s1-0135-g02.jpg
case_images: PMC5726703_01_abd-92-05-s1-0135-g02.jpg
case_images: f2
case_images: A 4-mm punch biopsy was taken and hematoxylin-eosin (HE) stained sections of the specimen demonstrated a dense nodular and diffuse dermal lymphocytic infiltrate, separated from the epidermis by a grenz zone, and admixed with numerous histiocytes and dendritic cells that surrounded the pilosebaceous units (Figure 2).
case_images: IImmunohistochemical staining. A - CD3. B -
  CD4. C - CD8 and D - CD20
case_images: abd-92-05-s1-0135-g03.jpg
case_images: PMC5726703_01_abd-92-05-s1-0135-g03.jpg
case_images: f3
case_images: CD20-positive B-cells and CD3, CD4 and CD8-positive T-cells, with abundant S100 and CD1a-positive dendritic cells surrounding hair follicles, consistent with the diagnosis of pseudolymphomatous folliculitis (Figures 3 and 4). Clonal T-cell receptor and immunoglobulin heavy chain gene rearrangements were not performed.
case_images: IImmunohistochemical staining. A - S100 e B -
  CD1a
case_images: abd-92-05-s1-0135-g04.jpg
case_images: PMC5726703_01_abd-92-05-s1-0135-g04.jpg
case_images: f4
case_images: CD20-positive B-cells and CD3, CD4 and CD8-positive T-cells, with abundant S100 and CD1a-positive dendritic cells surrounding hair follicles, consistent with the diagnosis of pseudolymphomatous folliculitis (Figures 3 and 4). Clonal T-cell receptor and immunoglobulin heavy chain gene rearrangements were not performed.