VEGFD and lymphangioleiomyomatosis: However, in contrast with our findings, Young et al showed that serum VEGF-D levels were significantly higher in patients with lymphangioleiomyomatosis (>600 pg/mL) than in those with CKD (39–90 pg/mL).[24] Differences between our results and those reported in previous studies might be a result of the usage of different measurement methods and patient groups.