PMID- 25788221 OWN - NLM STAT- MEDLINE DCOM- 20160316 LR - 20220310 IS - 1952-4013 (Electronic) IS - 1167-1122 (Linking) VI - 25 IP - 2 DP - 2015 Apr TI - Clinical observation of panniculitis in two patients with BRAF-mutated metastatic melanoma treated with a combination of a BRAF inhibitor and a MEK inhibitor. PG - 177-80 LID - 10.1684/ejd.2014.2512 [doi] AB - BACKGROUND: Treatment with selective BRAF or MEK inhibitors is frequently associated with cutaneous toxicities, including squamous cell carcinoma (SCC), papillomas and rash. These cutaneous adverse effects are typically observed at a lower incidence during combined BRAF and MEK inhibitor therapy. PATIENTS AND METHODS: Two male patients with stage IV metastatic BRAF-mutated melanoma were treated with a combination of a selective BRAF inhibitor and a selective MEK inhibitor (dabrafenib and trametinib, or encorafenib (LGX818) and binimetinib (MEK162)) within two different clinical trials. Ten and 150 days after treatment start respectively, the patients developed painful nodules on the legs. In addition, one patient developed symmetrical articulation pain and intermittent fever episodes. RESULTS: Based on the clinical and histological presentation, erythema nodosum-like panniculitis was diagnosed in both cases. No other aetiology could be found. After receiving topical or oral steroid treatment and anti-inflammatory analgesics, the painful nodular lesions disappeared several weeks later. In one case, a rebound of the painful nodules was observed when the combination treatment (dabrafenib and trametinib) was resumed after a 1-week unscheduled treatment interruption. CONCLUSIONS: Panniculitis has previously been described in association with BRAF inhibitor treatment, but not MEK inhibitor treatment. Combination treatment is usually associated with a lower incidence of cutaneous adverse events (AEs), as compared to monotherapy. Panniculitis was observed in two patients during combined BRAF and MEK inhibitor treatment. These cases illustrate the need for further research in a larger patient population to identify a possible link between combined BRAF and MEK inhibitor treatment and the incidence of panniculitis. FAU - Galliker, Nadja A AU - Galliker NA AD - University Hospital of Zurich Department of Dermatology Gloriastrasse 31 CH-8091 Zurich Switzerland. FAU - Murer, Carla AU - Murer C AD - University Hospital of Zurich Department of Dermatology Gloriastrasse 31 CH-8091 Zurich Switzerland. FAU - Kamarashev, Jivko AU - Kamarashev J AD - University Hospital of Zurich Department of Dermatology Gloriastrasse 31 CH-8091 Zurich Switzerland. FAU - Dummer, Reinhard AU - Dummer R AD - University Hospital of Zurich Department of Dermatology Gloriastrasse 31 CH-8091 Zurich Switzerland. FAU - Goldinger, Simone M AU - Goldinger SM AD - University Hospital of Zurich Department of Dermatology Gloriastrasse 31 CH-8091 Zurich Switzerland. LA - eng PT - Case Reports PT - Journal Article PL - France TA - Eur J Dermatol JT - European journal of dermatology : EJD JID - 9206420 RN - 0 (Benzimidazoles) RN - 0 (Carbamates) RN - 0 (Imidazoles) RN - 0 (Oximes) RN - 0 (Pyridones) RN - 0 (Pyrimidinones) RN - 0 (Sulfonamides) RN - 181R97MR71 (binimetinib) RN - 33E86K87QN (trametinib) RN - 8L7891MRB6 (encorafenib) RN - EC 2.7.11.1 (BRAF protein, human) RN - EC 2.7.11.1 (Proto-Oncogene Proteins B-raf) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - QGP4HA4G1B (dabrafenib) SB - IM MH - Adult MH - Antineoplastic Combined Chemotherapy Protocols/*adverse effects MH - Benzimidazoles/administration & dosage MH - Carbamates/administration & dosage MH - Humans MH - Imidazoles/administration & dosage MH - Male MH - Melanoma/*drug therapy/genetics/secondary MH - Mitogen-Activated Protein Kinases/antagonists & inhibitors MH - Oximes/administration & dosage MH - Panniculitis/*chemically induced MH - Proto-Oncogene Proteins B-raf/antagonists & inhibitors/*genetics MH - Pyridones/administration & dosage MH - Pyrimidinones/administration & dosage MH - Skin Neoplasms/*drug therapy/genetics/pathology MH - Sulfonamides/administration & dosage OTO - NOTNLM OT - BRAF inhibition OT - MEK inhibition OT - adverse event OT - melanoma OT - panniculitis OT - targeted therapy EDAT- 2015/03/20 06:00 MHDA- 2016/03/17 06:00 CRDT- 2015/03/20 06:00 PHST- 2015/03/20 06:00 [entrez] PHST- 2015/03/20 06:00 [pubmed] PHST- 2016/03/17 06:00 [medline] AID - ejd.2014.2512 [pii] AID - 10.1684/ejd.2014.2512 [doi] PST - ppublish SO - Eur J Dermatol. 2015 Apr;25(2):177-80. doi: 10.1684/ejd.2014.2512.