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Severe enteropathy caused by α-heavy chain disease lacking detectable M-proteins
Miwa Kurimoto1, Takashi Sonoki, Yasushi Nakamura
1Department of Hematology/Oncology, Wakayama Medical University, Japan.
Internal Medicine (Tokyo, Japan)
|March 18, 2014
Summary
Alpha-heavy chain disease (α-HCD) diagnosis can be challenging when M-proteins are undetectable. Immunohistochemistry on intestinal biopsies is crucial for confirming α-HCD in such cases.
Area of Science:
- Hematology
- Gastroenterology
- Immunology
Background:
- Alpha-heavy chain disease (α-HCD) is a rare lymphoproliferative disorder.
- Clinical presentation often includes malabsorption and gastrointestinal symptoms.
Observation:
- A 57-year-old Japanese man presented with diarrhea, weight loss, and malabsorption.
- High serum IgA levels suggested α-HCD, but M-proteins were not detected via standard electrophoresis.
- Intestinal biopsy revealed CD138(+)IgA(+) cell proliferation.
Findings:
- Immunohistochemistry confirmed α-HCD despite the absence of detectable M-proteins in serum.
- This highlights a subset of α-HCD patients lacking M-proteins.
Implications:
- Diagnosis of α-HCD requires considering immunohistochemistry when clinical suspicion is high, even without M-proteins.
- This diagnostic approach improves recognition of α-HCD in challenging cases.
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