“…2,3 18 F-FDG PET/CT plays a pivotal role in the staging of high-risk melanoma patients and in the assessment of therapy response. [4][5][6][7][8][9][10] Melanoma has the potential for metastases to all body parts, [11][12][13][14][15][16][17][18] including a direct invasion of veins, and melanoma metastasis forming a tumor thrombus has been sporadically described in the literature, mainly arising from visceral organ metastases, such as from the kidney, 19,20 pancreas, liver, 21,22 and small bowel. 23 There is also one report of an inguinal lymph node metastasis with femoral vein invasion, 24 but to the best of our knowledge, this is the first documented case of tumor thrombus in the internal thoracic intern vein from a bone metastasis of malignant melanoma.…”