panniculitis

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Related to lobular panniculitis: septal panniculitis

panniculitis

[pə‚nik·yə′līd·əs]
(medicine)
Inflammation of the layer of subcutaneous fat, especially in the abdomen.
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The most common histopathologic pattern in subcutaneous Sweet syndrome is that of neutrophilic lobular panniculitis (Figure 7, A), although a predominantly septal pattern has also been reported in few cases.
Centrilobular fat necrosis, a feature often seen in lobular panniculitis, is absent.
Histopathologically, scleredema is characterized by a lobular panniculitis with inflammation and marked edema of skin and subcutaneous tissue without needle-shaped clefts and adipocyte necrosis.
Mostly lobular panniculitis. Journal of the American Academy of Dermatology.
Punch biopsy revealed a lobular panniculitis with extension into expanded interlobular septa (Figure 1, A through G).
In addition, other areas showed a lobular panniculitis with foamy macrophages and scattered lymphocytes and plasma cells.
Histopathologically, PSP presents as lobular panniculitis with mixed infiltrate of lymphocytes, foamy histiocytes, neutrophils, and giant cells.
It is not known whether lupus erythematosus panniculitis progresses to SPTCL, but it is thought that in some cases benign panniculitis may progress to SPTCL, and it has been proposed to call these cases atypical lymphocytic lobular panniculitis. (18)