Published in:
Open Access
01-07-2015 | Research Article
Expression of colony-stimulating factor 1 is associated with occurrence of osteochondral change in pigmented villonodular synovitis
Authors:
Takehiro Ota, Hiroshi Urakawa, Eiji Kozawa, Kunihiro Ikuta, Shunsuke Hamada, Satoshi Tsukushi, Yoshie Shimoyama, Naoki Ishiguro, Yoshihiro Nishida
Published in:
Tumor Biology
|
Issue 7/2015
Login to get access
Abstract
Pigmented villonodular synovitis (PVNS) is a benign, translocation-derived neoplasm. Because of its high local recurrence rate after surgery and occurrence of osteochondral destruction, a novel therapeutic target is required. The present study aimed to evaluate the significance of protein expression possibly associated with the pathogenesis during the clinical course of PVNS. In 40 cases of PVNS, positivity of colony-stimulated factor 1 (CSF1), its receptor (CSF1R), and receptor activator of nuclear factor kappa-B ligand (RANKL) were immunohistochemically determined. The relationship between the positivity and clinical outcomes was investigated. High positivity of CSF1 staining intensity was associated with an increased incidence of osteochondral lesions (bone erosion and osteoarthritis) (p = 0.009), but not with the rate of local recurrence. Positivity of CSF1R and RANKL staining was not associated with any clinical variables. The number of giant cells was not correlated with positivity of any of the three proteins, or with the clinical outcome. Focusing on knee cases, CSF1 positivity was also associated with the incidence of osteochondal change (p = 0.02). CSF1R positivity was high in cases which had local recurrence, but not significantly so (p = 0.129). Determination of CSF1 and CSF1R expression may be useful as a prognosticator of the clinical course and/or outcomes of PVNS.