50-year-old patient with rectal carcinoma and neoadjuvant therapy (5-FU). Currently with pain in epigastric region, elevated CRP as well as sub febrile temperatures and new detected mass by ultrasound in right hepatic lobe. If development of new masses occurs while undergoing chemotherapy an ultrasound guided puncture indicated -> histologically: anaplastic rhabdoid dedifferentiated carcinoma (rare aggressive variant of a colorectal carcinoma).

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