Differential Diagnosis > Morphology > Reaction Patterns Expanded > Panniculitis

Panniculitis

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lower extremities – erythema nodosum vs. nodular vasculitis

upper extremities – lupus profundus vs. subcutaneous CTCL

 

hmtoggle_plus1Panniculitis that breaks down ddx:
•nodular vasculitis (erythema induratum)
•PAN
•pancreatic
•alpha1 anti-trypsin
•TB
•Weber Christian (?)
•histophagocytic (?)