Keywords: ALK; ALK, anaplastic lymphoma kinase; C-ALCL; C-ALCL, cutaneous anaplastic large T-cell lymphoma; CD30; Spitz; Spitz nevus; Spitz tumor; TPM3; TPM3, tropomyosin 3; TPM3-ALK; anaplastic lymphoma kinase; concurrent; corresponding; fusion; primary cutaneous anaplastic large cell lymphoma; rearrangement; translocation; tropomyosin 3.