M90.662

Clinical Causes: Genetic predisposition involving mutations affecting bone remodeling processes Environmental factors such as viral infections (e.g., paramyxovirus), although this is inconclusive Potential association with neoplastic diseases that can influence bone health and structure Age-related changes, with increased prevalence in individuals over 50 years of age Possibility of secondary osteitis deformans due to underlying neoplastic conditions impacting bone tissue

Key Symptoms: Bone pain, often deep and aching in the affected limb Deformity or enlargement of the affected segment of the bone Fragility of the affected bone, leading to increased risk of fractures Reduced mobility or stiffness in nearby joints Swelling or warmth over the affected area Possible neurological symptoms if nerve compression occurs due to bone thickening Deformities may cause gait disturbances or difficulty walking

Diagnosis Path: Plain radiographs showing characteristic bone changes such as cortical thickening and enlarged bone structure Bone scintigraphy (bone scan) to assess the extent of active disease Laboratory tests, including elevated serum alkaline phosphatase levels, indicating increased bone turnover Bone biopsy in some cases to exclude malignant transformation or other conditions Assessment for neoplastic markers if associated with underlying cancer

Treatment Protocols: Bisphosphonates, such as zoledronic acid or alendronate, to inhibit abnormal bone resorption Pain management with analgesics and anti-inflammatory medications Physical therapy to maintain mobility and strength Surgical intervention in cases with significant deformity, fractures, or joint complications Monitoring for complications like secondary osteoarthritis or malignant transformation Addressing underlying neoplastic conditions if present, through oncological treatments