Non-Neoplastic Dermatopathology

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5 Disorders of the Subcutis

Figure 5.7.3 Lupus panniculitis. Lymphocytic infiltrate within fat lobules consists of small lymphocytes with round to slightly irregular nuclei and no significant atypia. Lymphocytes do not show rimming of fat cells.

Figure 5.7.4 Lupus panniculitis. Lymphocytic vasculopathy with infiltration of vessel wall by lymphocytes.

Figure 5.7.5 Lupus panniculitis. Hyalinized collagen within deep dermis and subcutaneous fat lobules.

Figure 5.7.6 Lupus panniculitis. Colloidal iron stain demonstrating mucin deposition in the hyalinized stroma of the deep dermis and superficial subcutis.

Figure 5.7.8 Subcutaneous panniculitis-like T-cell lymphoma. Infiltrate of lymphocytes that show “rimming” of the adipocytes but no significant fat necrosis. Copyright © Wolters Kluwer, Inc. Unauthorized reproduction of the content is prohibited. 2023

Figure 5.7.7 Subcutaneous panniculitis-like T-cell lymphoma. Dense lobular infiltrate with preservation of the adipocytes. Note that the infiltrate is primarily within the lobules.