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Systemic amyloidosis. A report of 19 cases
1Department of Dermatology, Veterans General Hospital, Taipei, Taiwan, Republic of China.
Dermatology (Basel, Switzerland)
|January 1, 1994
Summary
Systemic amyloidosis, a rare disease in older adults, often presents with mucocutaneous signs. Skin biopsy is a highly effective diagnostic tool, even in clinically normal skin.
Area of Science:
- Internal Medicine
- Hematology
- Pathology
Background:
- Systemic amyloidosis is a rare, often aggressive disorder predominantly affecting elderly individuals.
- Mucocutaneous manifestations can serve as critical early indicators for diagnosing systemic amyloidosis.
- Prognosis for systemic amyloidosis is generally poor, necessitating early and accurate diagnosis.
Purpose of the Study:
- To investigate the diagnostic utility of mucocutaneous signs and biopsies in systemic amyloidosis.
- To analyze the prevalence of different types of systemic amyloidosis in a clinical cohort.
- To evaluate the effectiveness of skin biopsies in diagnosing systemic amyloidosis.
Main Methods:
- Retrospective analysis of 19 cases of systemic amyloidosis diagnosed over 14 years.
- Review of patient data including age, type of amyloidosis, and survival.
- Examination of biopsy results from tongue, rectum, abdominal fat, and clinically normal-appearing skin.
Main Results:
- Systemic amyloidosis occurred in patients aged 52-71 years (mean 62), with a median survival of 8 months.
- Primary systemic amyloidosis and myeloma-associated amyloidosis (42% each) were most common.
- Biopsies from clinically normal skin were positive for amyloid in 18 of 19 cases, highlighting diagnostic sensitivity.
Conclusions:
- Mucocutaneous manifestations are significant clues for diagnosing systemic amyloidosis.
- Skin biopsy, even from non-lesional sites, is a highly sensitive method for diagnosing systemic amyloidosis.
- Early diagnosis through accessible biopsy methods can potentially improve management of this severe condition.