Castleman's lymphoma among Japanese population

Area of Science:

• Oncology
• Pathology
• Hematology

Background:

• Castleman's disease (CD) is a rare lymphoproliferative disorder with diverse clinical and histological presentations.
• Previous reports on CD in Japanese literature since 1958 are reviewed, totaling 53 cases.
• The first reported case in Japan involved a pelvic tumor, expanding the known anatomical sites.

Observation:

• Histological hallmarks include variegated germinal centers with peculiar capillary proliferation.
• Multicentric germinal centers and expansive follicular growth compressing interfollicular areas are characteristic.
• The Japanese cohort exhibits a predilection for ages 10-19, with a female predominance.

Findings:

• The most common tumor site in Japanese patients is the upper body.
• Compared to other ethnicities, Japanese patients show more frequent tumor multiplicity.
• The plasma cell variant of Castleman's disease is less common in this population.

Implications:

• Castleman's disease may represent a distinct clinicopathological entity within the spectrum of lymphomas.
• Understanding ethnic variations in CD presentation is crucial for accurate diagnosis and management.
• Further research into the pathogenesis of CD is warranted to differentiate it from malignant lymphomas.