Aberrant CD200/CD200R1 expression contributes to painful synovium hyperplasia in a patient with primary hypertrophic osteoarthropathy

Yan Ren,Xuan Zhang,Bo Yang,Xiao-Mei Leng

doi:10.1007/s00296-013-2732-1

Abstract

We present a case of hypertrophic osteoarthropathy (PHO), with painful synovium hyperplasia involving both knees that was refractory to corticosteroid treatment. His rheumatoid factor and anti-CCP antibody was negative, and his serum ESR and CRP level was within normal range. Histological examination of the synovium obtained from his right knee revealed endothelial hyperplasia and vascular thickening without inflammation that was in association with aberrant expression of CD200/CD200R1, which highlighted the importance of aberrant CD200/CD200R1 in the regulation of the endothelial activation that contributed to the development of synovium hyperplasia in this PHO patient.

Highlights

Hypertrophic osteoarthropathy (PHO) is a rare disease of unknown aetiology characterized by hypertrophic skin changes, clubbing fingers and periostitis [1]
We present a case of hypertrophic osteoarthropathy (PHO), with painful synovium hyperplasia involving both knees that was refractory to corticosteroid treatment
Histological examination of the synovium obtained from his right knee revealed endothelial hyperplasia and vascular thickening without inflammation that was in association with aberrant expression of CD200/ CD200R1, which highlighted the importance of aberrant CD200/CD200R1 in the regulation of the endothelial activation that contributed to the development of synovium hyperplasia in this PHO patient

Summary

Introduction

Hypertrophic osteoarthropathy (PHO) is a rare disease of unknown aetiology characterized by hypertrophic skin changes, clubbing fingers and periostitis [1]. Abstract We present a case of hypertrophic osteoarthropathy (PHO), with painful synovium hyperplasia involving both knees that was refractory to corticosteroid treatment.

Results

Conclusion