Multifocal osteoclast-rich tumour in Paget bone disease and conventional giant cell tumour, two genetically distinct entities? Sequencing from a single case

Paget disease of bone is a metabolic disorder with a strong genetic component, characterised by pronounced disorganised bone remodelling. Complications of this disease include an increased risk of developing bone neoplasms. Here, we describe the case of a 60-year-old Italian patient with Paget disease of bone, presenting with an osteoclast-rich tumour. Our analysis of this entity, based on the clinical, morphological and genetic data (whole exome sequencing), suggests that osteoclast-rich lesions in Paget disease of bone are genetically distinct from classical giant cell tumour of bone. We discuss the importance of differentiating these osteoclast-rich lesions.

Automated summary

This study presents a case of a 60-year-old Italian patient with Paget disease of bone and an osteoclast-rich tumor. Through analysis of clinical, morphological, and genetic data, the authors suggest that osteoclast-rich lesions in Paget disease of bone are genetically distinct from classical giant cell tumor of bone. The importance of differentiating these lesions is discussed.