A Case of Atypical Lymphocytic Lobular Panniculitis.

Atypical lymphocytic lobular panniculitis (ALLP) is a rare T-cell dyscrasia of the subcutaneous fat. It typically presents with indurated erythematous nodules on the lower extremities and often will have a relapsing and remitting course. The cause is unknown, but clinically and histopathologically it shares similarities to lupus panniculitis (LP) and subcutaneous panniculitis-like T-cell lymphoma (SPTCL). It generally has an indolent course, and may best be treated like indolent versions of SPTCL with systemic steroids and immunosuppressive medications.