Trial Information

Effect of Fasting on the Size of Lymphangioleiomyomas in Patients With Lymphangioleiomyomatosis

Lymphangioleiomyomatosis (LAM) is a rare disease of women that is characterized by a
proliferation of abnormal smooth muscle-like cells (LAM cells) in the lungs, which leads to
cystic destruction of the lung parenchyma, in the axial lymphatics, resulting in
lymphangioleiomyomas, and in abdominal angiomyolipomas, primarily in the kidneys.
Lymphangioleiomyomas may cause abdominal distension and compress abdominal organs, producing
obstipation, bladder obstruction and neurological deficits. Leakage of chyle may be
responsible for ascites and pleural effusions. The lymphangioleiomyomas may change in size
during the day. This variation in tumor size may be due to increased chyle formation or
alterations in lymphatic flow. These studies however, were not performed with research
subjects who were fasting. Our hypothesis is that the ingestion of food increases chyle
formation and lymphatic flow, which in turn increases the size of the lymphangioleiomyomas.
The aim of this study is to test this hypothesis. We propose to conduct a study in 30 LAM
patients who have lymphangioleiomyomas to determine whether the ingestion of food, by
increasing chyle formation and lymphatic flow, increases the size of the
lymphangioleiomyomas.