Protein-losing enteropathy associated with or without systemic autoimmune disease: what are the differences?

Area of Science:

• Gastroenterology
• Immunology
• Internal Medicine

Background:

• Protein-losing enteropathy (PLE) is a condition characterized by excessive loss of serum proteins into the gastrointestinal tract.
• Systemic autoimmune (SA) diseases can manifest with various gastrointestinal involvements, including PLE.

Purpose of the Study:

• To compare the clinical characteristics, laboratory findings, endoscopic features, treatment, and outcomes of patients with PLE associated with SA diseases versus those without.

Main Methods:

• Retrospective analysis of 74 patients diagnosed with PLE between 2001 and 2010.
• Comparison of clinical data, laboratory results, endoscopic and imaging findings, treatment strategies, and patient outcomes between SA-positive and SA-negative groups.

Main Results:

• Patients with SA-associated PLE were younger, presented earlier, and showed more mucocutaneous-articular involvement, lymphopenia, and specific laboratory abnormalities (e.g., hyperglobulinemia, elevated LDH, hematuria, pyuria).
• The non-SA group exhibited more weight loss, malaise, fatigue, higher platelet counts, and elevated alkaline phosphatase. Lupus patients within the SA group had distinct features compared to non-lupus SA patients.
• Endoscopic findings differed, with diffuse erythema in the SA group and focal lesions in the non-SA group. Treatment response was comparable, but SA patients normalized serum albumin faster. Non-SA patients had more infectious episodes.

Conclusions:

• PLE associated with SA diseases presents a distinct clinical and pathological profile compared to non-SA PLE.
• Patients without SA diseases are at a higher risk for complications and mortality.
• Both patient groups demonstrate effective treatment responses, though recovery timelines for certain markers differ.