You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["AnatomicalEntity"].

Please return the output as a JSON object of the format: {"AnatomicalEntity": ["tumor cells", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

[Effects of carcinostatic agents in the hematogenous metastasis of cancer]. 
The experimental studies in vitro and in vivo were performed to investigate the effects of carcinostatic agents in the adhesion of cancer cells to endothelial cells. Certain carcinostatic agents induce the expression of E-selectin on endothelial cells and enhance the expression of carbohydrate ligands on cancer cells. Consequently, increased adhesion of cancer cells to endothelial cells was observed by the treatment of carcinostatic agents. In the trans-splenic hepatic metastasis model using nude mice, the augmentation of cancer metastasis was observed by the treatment of carcinostatic agents. From the above, we concluded that carcinostatic agents may increase the metastatic ability of cancer cells in patients with cancer.
{"AnatomicalEntity": ["trans-splenic", "hepatic", "cancer", "endothelial cells", "cancer cells"]}