[Lymphedema].

The 5 most important pillars of conservative lymphoedema therapy are (1) compression, (2) manual lymphatic drainage (MLD), (3) exercise, (4) skin and wound care, and (5) self-management. Without compression therapy the risk of cellulitis is increased and causes an elevated health/economic burden. The use of nocturnal compression shows advantages and a high degree of treatment adherence. The previous recommendation that compression should not be used for cellulitis has been cancelled. On the contrary, compression therapy is explicitly desirable for inflammatory dermatoses. The fact that lymphedema extremities show a 3-fold higher association with malignant skin tumours compared to unaffected extremities deserves attention. Using ICG lymphography, 4 different functional regions of lymphatic leg bundles were differentiated. The severity of the lymphoedema correlated with the kind of affected bundles. Vascularized lymph node transfer, which is a reconstructive lymphatic surgery procedure, was found to show evidence in terms of volume reduction, improved functionality, and better quality of life. The higher the BMI, the higher the risk of developing lymphoedema. Meta-analyses confirm the benefits of an active lifestyle with exercise and sporting activities in conjunction with patient education. Apparative systems for decongestion (intermittent pneumatic compression) usually force patients to remain immobile during application. Portable apparative compression systems are a promising alternative but are not yet available in Germany. Primary lymphoedema is not a uniform entity. The St. George's classification system shows the association of primary lymphoedema with systemic or syndromic diseases and vascular malformations as well. As a work-in-progress algorithm, it is a valuable aid in classifying primary lymphoedema, confirming the diagnosis and finding therapeutic approaches.