Expression profiling revealed a gene expression pattern distinguishing SPTL from combined control samples. a) Visualization of 290 genes that are overexpressed between pre-treatment (n = 4) and combined control samples (n = 4). Only the normal fat control samples are shown. Expression values are in base-2 logarithm scale. b) Visualization of 99 genes from set a) above, annotated with the Gene Ontology term “Defence response” (GO:0006952). Here, the erythema nodosum (EN) control samples with a similar type of tissue inflammation, but devoid of malignant T lymphocytes, are shown in turn.