The panniculitis chapter will focus on the most commonly encountered primarily septal and primarily lobular entities. Not included in this chapter are entities like necrobiosis lipoidica and scleroderma (localized morphea) which can sometimes show septal widening with extension of dermal fibrosis. As well, lipodystrophy or lipoatrophy is the localized or generalized loss of fat often following one the many inflammatory panniculitides or systemic disease (diabetes, HIV, etc.). The lobular panniculitides are separated based on whether vasculitis is a prominent feature or not.
KeywordsAncillary Study Erythema Nodosum Proximal Extremity Dermal Fibrosis Mixed Inflammatory Infiltrate
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