Although obesity is a major clinical risk factor for lymphedema, the mechanisms that regulate this effect remain unknown. Recent reports have demonstrated that obesity is associated with acquired lymphatic dysfunction. The purpose of this study was to determine how obesity-induced lymphatic dysfunction modulates the pathological effects of lymphatic injury in a mouse model. We used a diet-induc...

Many questions remain regarding the mechanism of cervical lymph node metastasis via lymphatic vessels. We report here the three-dimensional dynamics of the lymphatic architecture around tumor during growth of implanted VX2 tongue cancer. The tongue and the deep cervical lymph nodes of rabbits were observed at 3, 7 and 10 days after transplantation of VX2 cancer cells (n = 5 in each group). Lymp...

BACKGROUND The extensive mesenteric lymphadenopathy associated with midgut carcinoids often causes lymphatic obstruction and leads to the development of alternative lymphatic drainage pathways. We hypothesized that altered lymphatic drainage makes traditional determination of resection margins inadequate. METHODS One hundred and seventy patients underwent cytoreductive surgery for neuroendocr...

Understanding the mechanisms behind endothelial cell identity is crucial for the goal of manipulating microvascular networks. Lysophosphatidic acid (LPA) and serum stimulation have been suggested to induce a lymphatic identity in blood endothelial cells in vitro. The objective of this study was to determine if LPA or serum induces blood-to-lymphatic vessel phenotypic transition in microvascular...

The anatomical and functional status of the epifascial and subfascial lymphatic compartments was analyzed using two compartment lymphoscintigraphy in five groups of patients (total 55) with various forms of edema of the lower extremities. Digital whole body scintigraphy enabled semiquantitative estimation of radiotracer transport with comparison of lymphatic drainage between those individuals w...

Fluid shear forces have established roles in blood vascular development and function, but whether such forces similarly influence the low-flow lymphatic system is unknown. It has been difficult to test the contribution of fluid forces in vivo because mechanical or genetic perturbations that alter flow often have direct effects on vessel growth. Here, we investigated the functional role of flow ...

A review is given of the effects of external whole body and local irradiation in man and experimental animals. Internal irradiation by radioactive substances in man and experimental animals is considered. An abstract of pertinent findings is given in the summary and conclusions. THE ORIGIN AND DIFFERENTIATION OF BLOOD FORMING TISSUE All investigators are in agreement that blood formation occurs...

Cystic hygroma is a benign, painless loculated lymphatic proliferation, which occur due to a combination of sequestration from developing lymphatic system, abnormal budding of the lymphatic system or lack of development of the normal connections between venous and lymphatic drainage. We report a case of giant cervico-thoracic cystic hygroma in a preterm neonate with management options and a bri...

Endothelial progenitor cells have been shown to contribute to angiogenesis in various tumor models. Here, we have studied the relative contributions of bone marrow (BM)-derived endothelial progenitors and pre-existing lymphatic vessels to tumor lymphangiogenesis. We did not find significant incorporation of genetically marked BM-derived cells in lymphatic vessels during tumor- or vascular endot...

Morphological profiles of lymphatic vessels in adult zebrafish trunk and ovary were studied by immunohistochemistry and electron microscopy. The present immunohistochemistry for Prox1 was successful in demonstrating lymphatic vessels in zebrafish. The zebrafish trunk revealed two types of bilateral longitudinal lymphatic trunks draining lymph centripetally along dorsal aorta and posterior cardi...