Introduction
Background
Traditionally, protein-losing gastroenteropathies have been classified into 3 groups (depending on the mechanism of their etiology) that include the following: (1) those causing mucosal damage leading to increased permeability to protein (usually not involving mucosal ulcerations), (2) those with mucosal erosions and/or ulcerations, and (3) those in which protein loss is secondary to mechanical lymphatic obstruction.
While a more detailed discussion on Protein-Losing Enteropathy is presented in another article, this article specifically addresses intestinal lymphangiectasia.
Pathophysiology
Intestinal lymphangiectasia is a disease characterized by hypoproteinemia, edema, and lymphocytopenia, resulting from dilatation of intestinal lymphatics and loss of lymph fluid into the gastrointestinal (GI) tract.1 This leads to immunologic abnormalities, including hypogammaglobulinemia, anergy, and impaired allograft rejection. In addition to the loss of other serum components (eg, lipids), iron and certain trace metals may also be affected.2
Frequency
United States
Frequency in the United States and internationally is unknown.
Mortality/Morbidity
Morbidity is related to the pathophysiology of this disease. Edema and diarrhea are predominant clinical features; however, the following negative sequelae are also observed:
- Lymphocytopenia, hypogammaglobulinemia
- Hypoalbuminemia, hypocalcemia, trace metal deficiency
- Chylous pleural effusions, ascites (Chylous ascites and transudative ascites are reported.)
Race
No racial predilection exists.
Sex
The male-to-female ratio is 3:2.
Age
Intestinal lymphangiectasia can be primary (ie, congenital), in which case it affects children and young adults (mean age of onset, 11 y). The diagnosis in these cases often occurs during the first decade of life, with the first manifestations being persistent diarrhea and peripheral edema. This condition can also be secondary to other disease states, thus affecting older adults. In a series from Japan, the average age at onset was 22.9 years.
Clinical
History
- Patients usually present in childhood with edema and nonbloody diarrhea. Edema may be unilateral or bilateral, depending on the site of the lesion. Edema in primary intestinal lymphangiectasia is usually bilateral, while the secondary type often manifests as unilateral edema and is caused by various neoplastic, infiltrative, and inflammatory lesions affecting one side of the body.
- Frequently, steatorrhea, malabsorption, lymphocytopenia, and hypogammaglobulinemia are present.
- Ascites (often chylous ascites) and chylous pleural effusions are also reported in patients with long-standing lymphangiectasia.
- If the onset of disease occurs during the early part of the first decade of life, growth retardation usually ensues.
- Despite hypogammaglobulinemia, opportunistic infections rarely occur, although lymphocytopenia predisposes patients to abnormal cellular immunities, including homograft rejection and cutaneous anergy.
Physical
- Primary intestinal lymphangiectasia2
- Peripheral edema is noted on physical examination in patients with primary intestinal lymphangiectasia.
- Macular edema on funduscopic examination has been reported and is a cause of reversible blindness. Secondary lymphangiectasia may involve multiple physical findings, depending on the etiology.
- Pachydermoperiostosis has been associated with protein-losing enteropathy due to intestinal lymphangiectasia. Pachydermoperiostosis is a rare hereditary disease characterized by clubbing of the fingers, periostosis, and skin changes.
Causes
- Abdominal or retroperitoneal carcinoma
- Lymphoma
- Cardiac diseases
- Crohn disease
- Mesenteric tuberculosis
- Sarcoidosis
- Whipple disease
- Chronic pancreatitis
- Scleroderma
- Celiac disease
- Systemic lupus erythematosus (SLE)
- Retroperitoneal fibrosis
- Intestinal endometriosis
- Sclerosing mesenteritis
- Lymphenteric fistula
More on Intestinal Lymphangiectasia |
Overview: Intestinal Lymphangiectasia |
| Differential Diagnoses & Workup: Intestinal Lymphangiectasia |
| Treatment & Medication: Intestinal Lymphangiectasia |
| Follow-up: Intestinal Lymphangiectasia |
| References |
| Further Reading |
| Next Page » |
References
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Further Reading
Related eMedicine topics
Hypogammaglobulinemia
Infections in the Immunocompromised Host
Malabsorption
Protein-Losing Enteropathy (Gastroenterology)
Protein-Losing Enteropathy (Pediatrics: General Medicine)
Keywords
intestinal lymphangiectasia, lymphangiectasia, protein-losing enteropathy, hypoproteinemia, medium-chain triglycerides, medium-chain fatty acids, medium-chain triglyceride, primary intestinal lymphangiectasia, congenital intestinal lymphangiectasia, Milroy disease, protein-losing gastroenteropathies, lymphocytopenia, hypogammaglobulinemia
Overview: Intestinal Lymphangiectasia