Case Report of Pigmented Villonodular Synovitis Arising from Calcaneocuboid Joint in an Army Staff

Pigmented villonodular synovitis (PVNS) is a locally destructive benign lesion usually affecting the synovial tissue of weight bearing joints. Herein we reported a 20-year-old male patient who was an army staff with a foot lesion which was painful in army boots. At the beginning the lesion was considered as a ganglion cyst. The further investigations revealed cortical erosion of Cuboid bone on radiograph. Pigmented villonodular synovitis was considered as a probable diagnosis after observation of low signal lesion around Calcaneocuboid joint on both T1 and T2 images of Magnetic Resonance Imaging (MRI). The treatment was done with excision of the lesion and synovectomy of Calcaneocuboid joint. The diagnosis was confirmed with histological studies. At the more than one year follow-up the patient was completely asymptomatic and there was no evidence of recurrence. The purpose of this article was to increase awareness of diagnosing this rare soft tissue neoplasm among clinicians which might be misdiagnosed as ganglion or synovial cysts in hindfoot zone.