BDNF and endometriosis: Endometriosis-related neuropathic pain could be expected to arise in the context of endometriosis for a number of reasons, such as the possible nerve damage during surgery, the possible nerve involvement from the endometriotic lesion [16], and inflammatory mediators such as Brain-Derived Neurotrophic Factor (BDNF) and Tumor Necrosis Factor (TNF)-alpha in women with endometriosis, potentially sensitizing nerve endings [17].