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:

FAS -1377 G/A polymorphism and the risk of lymph node metastasis in cervical cancer. 
Single-nucleotide polymorphisms of the FAS -1377G/A, FAS -670A/G, and FASL -844T/C genes may alter transcriptional activity of these genes. Recent evidence suggests an association of these polymorphisms with an increased risk of cervical cancer, so we explored this relationship. Genotypes of 155 patients with cervical cancer and 160 healthy control subjects were determined using polymerase chain reaction-based restriction fragment length polymorphism (PCR-RFLP). Associations with cancer risk were estimated using two-sided logistic regression. We observed a significantly increased risk of lymph node metastasis associated with the FAS -1377 GA or AA polymorphism [odds ratio (OR) = 4.16, 95% confidence interval (CI) = 1.10 to 15.74; P = 0.036]. In addition, the FAS -670AG or GG genotype showed an increased incidence of node metastasis, but these findings were not statistically significant (OR = 3.67, 95% CI = 0.96-14.00, P = 0.059). There was no significant association between an increased risk of cervical cancer and polymorphisms of the death pathway genes FAS and FASL. None of the polymorphisms were associated with risk of advanced stage or histologic subtype of cervical cancer. In conclusion, FAS -1377 G-->A polymorphism may be associated with an increased risk of lymph node metastasis in Korean cervical cancer patients.
{"AnatomicalEntity": ["node", "lymph node", "cervical cancer", "cancer"]}