PGR and melanoma: Immunohistochemical staining of the resected lesion revealed positivity for tumor markers like glial fibrillary acidic protein (GFAP), oligodendrocyte transcription factor, progesterone receptor (PR), S100, vimentin (VIM) as well as Ki-67 labeling index of about 3% (Fig. 3A–E) and negativity for markers like Somatostatin receptor 2, thyroid transcription factor-1, CD34, CD57, H3K27 M, human melanoma black-45, signal transducer and activator of transcription 6 as well as epithelial membrane antigen.