TNFRSF1B and endometriosis: However, other data provided by another group [103] point out that the frequencies of the TNFα T/C/C haplotype allele and the TNFR2 G/G/T haplotype allele are significantly decreased in women with endometriosis compared to women without endometriosis, thus associating these haplotype alleles and polymorphisms to the disease.