PT  - JOURNAL ARTICLE
AU  - Shiau, Carolyn J
AU  - Abi Daoud, Marie S
AU  - Wong, Se Mang
AU  - Crawford, Richard I
TI  - Lymphocytic panniculitis: an algorithmic approach to lymphocytes in subcutaneous tissue
AID  - 10.1136/jclinpath-2014-202849
DP  - 2015 Dec 01
TA  - Journal of Clinical Pathology
PG  - 954--962
VI  - 68
IP  - 12
4099  - http://jcp.bmj.com/content/68/12/954.short
4100  - http://jcp.bmj.com/content/68/12/954.full
SO  - J Clin Pathol2015 Dec 01; 68
AB  - The diagnosis of panniculitis is a relatively rare occurrence for many practising pathologists. The smaller subset of lymphocyte-predominant panniculitis is further complicated by the diagnostic consideration of T cell lymphoma involving the subcutaneous tissue, mimicking inflammatory causes of panniculitis. Accurate classification of the panniculitis is crucial to direct clinical management as treatment options may vary from non-medical therapy to immunosuppressive agents to aggressive chemotherapy. Many diseases show significant overlap in clinical and histological features, making the process of determining a specific diagnosis very challenging. However, with an adequate biopsy including skin and deep subcutaneous tissue, a collaborative effort between clinician and pathologist can often lead to a specific diagnosis. This review provides an algorithmic approach to the diagnosis of lymphocyte-predominant panniculitis, including entities of septal-predominant pattern panniculitis (erythema nodosum, deep necrobiosis lipoidica, morphea profunda and sclerosing panniculitis) and lobular-predominant pattern panniculitis (lupus erythematous panniculitis/lupus profundus, subcutaneous panniculitis-like T cell lymphoma, cutaneous γ-δ T cell lymphoma, Borrelia infection and cold panniculitis).