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Background: Traumatic lymphatic leakage is a rare but potentially life-threatening complication. The purpose of this study was to introduce ultrasound-guided intranodal lymphangiography and embolisation techniques for postoperative lymphatic leakage in patients with cancer. Methods: From January 2018 through June 2020, seven cancer patients (three males, four females, aged 59–75 years [mean 67.57 ± 6.11 years]) developed lymphatic leakage after abdominal or pelvic surgery, with drainage volumes ranging from 550 to 1200 mL per day. The procedure and follow-up of ultrasound-guided intranodal lymphangiography and embolisation were recorded. This study retrospectively analysed the technical success rate, operative time, length of hospital stay, clinical efficacy, and complications. Results: The operation was technically successful in all patients. Angiography revealed leakage, and embolisation was performed in all seven patients (7/7, 100%). The operative time of angiography and embolisation was 41 to 68 min, with an average time of 53.29 ± 10.27 min. The mean length of stay was 3.51 ± 1.13 days. Lymph node embolisation was clinically successful in five patients (5/7, 71.43%), who had a significant reduction in or disappearance of chylous ascites. The other two patients received surgical treatment 2 weeks later due to poor results after embolisation. All patients were followed for 2 weeks. No serious complications or only minor complications were found in all the patients. Conclusions: Ultrasound-guided intranodal lymphangiography and embolisation were well tolerated by the patients, who experienced a low incidence of complications. Early intervention is recommended for cancer patients with postoperative lymphatic leakage. [ABSTRACT FROM AUTHOR]