Indeed, a broad range of morphology, including, among others, clear cell, papillary, oncocytic or spindle cell-like shape, has been observed.23 Moreover, there is no specific immunohistochemistry, although remarkably, most tumours stain positive with Melan A or Cathepsin K. Ultimately, FISH or other molecular evidence of TFEB translocation is required for diagnosis.3,5,23,24. Here, CTSK is linked to neoplasm.