Non-Neoplastic Dermatopathology

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5 Disorders of the Subcutis

Figure 5.8.3 Cold panniculitis. Lobular lymphocytic infiltrate in subcutis consisting primarily of small lymphocytes. Blood vessels are unremarkable.

Figure 5.8.4 Cold panniculitis. Area of lipophagic fat necrosis with foamy histiocytes surrounding adipocytes and fat cysts.

Figure 5.8.5 Cold panniculitis. Mucin deposition in reticular dermis on colloidal iron stain. This and other features overlap with lupus panniculitis; therefore, clinic correlation is essential.

Figure 5.8.6 Lupus panniculitis. Lobular inflammatory infiltrate with extension into septae and, more superficially, around the vascular plexus and adnexae.

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Figure 5.8.7 Lupus panniculitis. Moderately dense lobular lymphocytic infiltrate.

Figure 5.8.8 Lupus panniculitis. Lymphocytic vasculopathy characterized by lymphocytes permeating the vessel wall without appreciable fibrinoid necrosis.