Retrograde lymph flow in the lymphatic vessels in limb lymphedema. 2022

Helen Mackie, and Hiroo Suami, and Belinda M Thompson, and Quan Ngo, and Asha Heydon-White, and Robbie Blackwell, and Louise A Koelmeyer
Australian Lymphoedema Education, Research and Treatment (ALERT), Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW, Australia; Mount Wilga Private Hospital, Hornsby, NSW, Australia.

Retrograde movement of lymph owing to damaged and/or incompetent valves in the lymphatic vessels has been considered a pathological feature of lymphedema. This study aimed to determine the prevalence of retrograde lymph flow and the characteristics of patients with this condition using indocyanine green (ICG) lymphography. An audit of 679 patients with upper or lower limb swelling who underwent ICG lymphography was undertaken over a 4-year period. Harvey's technique was applied to identify retrograde flow in the lymph collecting vessel during ICG lymphography. The characteristics of patients with retrograde lymph flow were recorded. Twenty-one patients (3.7%; lower limb, n = 19; upper limb, n = 2) were identified as having retrograde flow in lymph collecting vessels out of 566 confirmed lymphedema patients (lower limb, n = 275; upper limb, n = 291). Of the two patients with upper limb lymphedema (ULLE), one had a short segment of retrograde lymph flow in the forearm. The other patient with ULLE and one patient with lower limb lymphedema (LLLE) were previously diagnosed with lymphedema-distichiasis syndrome. Of the remaining 18 patients with LLLE and retrograde lymph flow, nine had initiating insect bites with lymphangitis and three had palpable benign enlarged inguinal lymph nodes evident before lower limb swelling onset. None had cancer-related LLLE. Retrograde lymph flow with valve incompetence in the lymph-collecting vessels was a rare finding in ULLE and a relatively uncommon finding in LLLE, contradicting the conventional understanding of pathological changes in lymphedema. ICG lymphography identified anticipated retrograde lymph flow in two patients with lymphedema distichiasis. In the remaining patients, retrograde lymph flow may have resulted from toxic or asymptomatic lymphangitis but there was no association with secondary cancer-related lymphedema. These findings have implication for conservative management as well as lymphovenous anastomosis surgery where both ends of a transected lymph collecting vessel would be potential targets for anastomoses.

UI MeSH Term Description Entries
D007208 Indocyanine Green A tricarbocyanine dye that is used diagnostically in liver function tests and to determine blood volume and cardiac output. Cardio-Green,Cardiogreen,Ujoveridin,Vofaverdin,Vophaverdin,Wofaverdin,Cardio Green,Green, Indocyanine
D008205 Lymphangitis A lymphatic disease characterized by INFLAMMATION of LYMPHATIC VESSELS. Lymphangitides
D008209 Lymphedema Edema due to obstruction of lymph vessels or disorders of the lymph nodes. Milroy's Disease,Congenital Familial Lymphedema,Congenital Hereditary Lymphedema,Early Onset Lymphedema,Hereditary Lymphedema,Hereditary Lymphedema 1,Hereditary Lymphedema Type I,Lymphedema, Early-Onset,Lymphedema, Hereditary, Ia,Milroy Disease,Nonne-Milroy Disease,Nonne-Milroy Lymphedema,Nonne-Milroy-Meige Disease,Primary Congenital Lymphedema,Congenital Hereditary Lymphedemas,Congenital Lymphedema, Primary,Congenital Lymphedemas, Primary,Early Onset Lymphedemas,Early-Onset Lymphedema,Early-Onset Lymphedemas,Hereditary Lymphedema 1s,Hereditary Lymphedema, Congenital,Hereditary Lymphedemas,Hereditary Lymphedemas, Congenital,Lymphedema, Congenital Hereditary,Lymphedema, Early Onset,Lymphedema, Hereditary,Lymphedema, Nonne-Milroy,Lymphedema, Primary Congenital,Lymphedemas,Lymphedemas, Congenital Hereditary,Lymphedemas, Early Onset,Lymphedemas, Early-Onset,Lymphedemas, Hereditary,Lymphedemas, Primary Congenital,Milroys Disease,Nonne Milroy Disease,Nonne Milroy Lymphedema,Nonne Milroy Meige Disease,Primary Congenital Lymphedemas
D008220 Lymphography Radiographic study of the lymphatic system following injection of dye or contrast medium. Lymphangiography,Lymphangiographies,Lymphographies
D009369 Neoplasms New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms. Benign Neoplasm,Cancer,Malignant Neoplasm,Tumor,Tumors,Benign Neoplasms,Malignancy,Malignant Neoplasms,Neoplasia,Neoplasm,Neoplasms, Benign,Cancers,Malignancies,Neoplasias,Neoplasm, Benign,Neoplasm, Malignant,Neoplasms, Malignant
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D042601 Lymphatic Vessels Tubular vessels that are involved in the transport of LYMPH and LYMPHOCYTES. Capillaries, Lymphatic,Lymphatic Capillaries,Lymphatic Venules,Venules, Lymphatic,Capillary, Lymphatic,Lymphatic Capillary,Lymphatic Venule,Lymphatic Vessel,Venule, Lymphatic,Vessel, Lymphatic,Vessels, Lymphatic

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