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The role of lymphoscintigraphy, performed with 99mTc-labeled antimony sulfur colloid, in the diagnosis of lymphedema and as a test for selection of patients for microvascular operation was evaluated in 32 patients with primary and secondary lymphedema and four patients with other causes of leg edema. Lymphoscintigraphy clearly demonstrated if edema was of lymphatic origin. Five different image patterns were identified; abnormal image patterns could not be predicted from clinical history or physical findings. Quantitative evaluation of removal of the radioactive colloid from the injection site and appearance in lymph node sites and liver was of limited usefulness. Nine patients underwent various surgical procedures before or after lymphoscintigraphy. Lympho-venous anastomoses were possible only in patients who had patent lymph channels visible on lymphoscintigrams. Based on initial experience, lymphoscintigraphy seems to be useful to select patients for microvascular operation.

The microcirculation of adipose tissue is poorly understood either because of the absence of histological documents or because they fail to explain pathological conditions. However, disturbances of blood flow and parietal lesions of the microvessels are the basis for these disorders. Although we speak of disturbances of the vascular control mechanisms, these mechanisms are poorly understood and although we speak of arteriovenous short-circuits, the existence of these lesions has not been proven. In fact, classically, the circulation in the dermis and hypodermis is assured by a meshwork of arterioles, venules and capillaries, but biopsies of lateral and anterior regions of the thigh have demonstrated "block devices" in the walls of small arteries and arterioles which are able to regulate the rate of blood flow towards the capillary bed. Following contraction of these devices, the vascular lumen dilates, ensuring free circulation and when they relax, the lumen closes, resulting in decreased or no blood flow. These smooth muscle devices within the arterial wall resemble small cushions in the small arteries and more or less pedunculated polyps in the arterioles, either simple or fissured in the form of an elephant's trunk with a safety valve effect, arranged either in a single column or in two columns face to face. This provides evidence for the particularly disturbed vasculo-tissue inter-relations observed in venous insufficiency.(ABSTRACT TRUNCATED AT 250 WORDS)

Lipedema of the lower extremities are diagnosed on the basis of clinical findings . An exact differentiation is necessary since therapeutical considerations are depending on the pathophysiology of the diseases. In lipedema (Allen and Hines) as weil as in erythrocyanosis cruris puellarum (Klingmüller) an examination of the state of the lymphatic vessels is justified. Using isotope lymphography the lymphatic capacitY, of the lower extremities can be assessed without problem. As demonstrated a disturbance of lymphatic transport is not regularly present in these two syndroms. Therefore we can not consider them as lymphedema. The frequent appearance of unilateral lymphostasis with definite clinical differenccs of both extremities indicate on the other band that lipedema is not seldom superimposed by the lymphedema .

Patients with lipoedema of the typus rusticanus Moncorps show a skin elasticity deficit of the skin of the calf. This is partly due to the derma oedema in the skin of these patients and seems partly to be due to an intrinsic connective tissue defect in the skin of such patients. The auteurs put forward the hypothesis that also present calf muscle pump dysfunction in these patients is the result of a connective tissue defect of the fascia of the muscular compartment, as an expression of a more generalized connective tissue defect.

Two cases of lipedema are presented. They illustrate this clinical syndrome which occurs almost exclusively in women and presents as grossly enlarged legs, thighs and buttocks. The etiology remains uncertain. Although infrequently diagnosed, lipedema is not rare. We report success treating such patients with properly measured and fitted compression garments.

La classification des lymphoedèmes en diverses catégories étiologiques est importante autant pour le diagnostic que pour un programme thérapeutique correct. L'approche diagnostique idéale doit Par conséquent envisager toutes les conditions, autant congénitales qu'acquises, responsables de la perturbation de la circulation lymphatique. Dans toutes les formes l'anamnèse est d'intérêt fondamental pour arriver au diagnostic étiologique alors qdu' e l'exame n c1 m· 1· que su ffii t a· poser le si·m ple iagnostic de lymphoedème.

Lipedema of the legs is a symmetrical thickening of upper and lower leg and topically accentuated fat pads. The back of the foot is usually free of swelling. Pathogenetically it is a disturbance of the distribution pattern of subcutaneous fat tissue. Epidemiologically, the subjects affected are women, starting from puberty. Weight reduction programs do not influence the real deformations. If this abnormal fat tissue is infiltrated by angiological diseases, these manifest themselves in modified form. In particular, all the symptoms are more painful. In arterial ischemic syndromes that taut skin is susceptible to necrosis at atypical locations. For reconstruction of trunk arteries it is advisable to bypass larger bulges for better wound nealing. Venous strips should be peeled out away from fat pads and venous-bridges very carefully to protect the tissue. Acute and chronic phlebothrombosis lead to unusual and asymmetrical forms of swelling. The venous ulcer lies directly beneath a fat-muff in the gaiter region. Since they are hard to compress, free skin transplants should be considered early in the course of development. Surgery of varicose veins calls for most careful technique to ensure wound healing. From the lymphological viewpoint there are clinically and lymphographically mixed forms of lymphedema with lipedema.

This condition, which has the full name of 'erythrocyanosis frigida crurum puella rum' (cold reddish blueness of the legs of girls), is extremely common. It is not always recognized, being misdiagnosed as lymphoedema, vasomotor disease, arterial insufficiency, and other things. The skin of the legs is cold to the touch and exhibits patches of bluish discoloration. There may be chilblains and small superficial ulcerated areas. There is often an abnormally large amount of fat particularly above the ankle and around the tendo Achillis. For this reason it is sometimes called ' lipoedema'. The affected patches are often hypersensitive to light touch and may irritate with changes of temperature. Deeper palpation may reveal tenderness and nodularity of the underlying fat. The condition is usually symmetrical or alsmost so. The feet often remain normal. At typical case is illustrated in Figs. 14.22 and 14.23

While the term cellulitis is incorrect, it is commonly used and deserves a nosological classification. "Cellulitis is a dermohypodermosis and an oedemato-sclerous panniculopathy- It is indeed a true histangiography in which the fibroblastic reaction predominates over capillaro-veinular changes. Adipocytes of exaggerated size interpenetrate into micro- and later into macronodules marked off by more or less structured conjunctive fibrilla, thereby making treatment difficult.

Systemic causes of leg edema include idiopathic cyclic edema, heart failure, cirrhosis, nephrosis and other hypoproteinemic states. Lymphedema may be primary, or secondary to neoplasm, lymphangitis, retroperitoneal fibrosis and, rarely (in the U.S.), filariasis. Thrombophlebitis and chronic venous insufficiency are not uncommon causes. Finally, infection, ischemia, lipedema, vascular anomalies, tumors and trauma can be responsible for the swollen leg.