Different types of amyloid concomitantly present in the same patients

Area of Science:

• Hematology
• Pathology
• Biochemistry

Background:

• Concomitant deposition of different amyloid fibril types in a single patient is considered improbable.
• Amyloidosis, a group of diseases characterized by protein misfolding and deposition, presents diagnostic and therapeutic challenges.

Purpose of the Study:

• To report cases of biopsy-proven concomitant different types of amyloid fibrils in patients with plasma cell disorders.
• To discuss the therapeutic implications and challenges in managing frail, elderly patients with systemic amyloidosis.

Main Methods:

• Immunogold electron microscopy was used to characterize amyloid fibrils.
• Case series reporting clinical findings and treatment approaches.

Main Results:

• Four patients with plasma cell disorders were diagnosed with biopsy-proven concomitant different types of amyloid fibrils.
• Treatment decisions for elderly, frail patients involve balancing chemotherapy necessity for AL amyloidosis against treatment toxicity.

Conclusions:

• The co-occurrence of different amyloid types, though rare, should be considered in plasma cell disorder patients.
• Systemic amyloid syndromes necessitate therapy to prevent organ damage, with stem cell transplant as a preferred option for eligible candidates.