Periosteoperosis: Periosteal Thickening – Causes, Symptoms, and Treatment

Periosteoperosis (also periosteal hyperostosis) is thickening of the periosteum due to new bone formation on the outer surface of cortical bone.

Etiology

• Reactive (most common): Chronic irritation/inflammation from trauma, infection (osteomyelitis), degenerative joint disease, overuse (stress reaction).
• Systemic diseases:
  • Paget's disease of bone (chaotic remodeling)
  • Hypertrophic osteoarthropathy (HOA) – lung cancer, cyanotic heart disease
  • Acromegaly (GH excess)
  • Fluorosis (chronic fluoride excess)
  • Thyroid acropachy (Graves')
  • Venous stasis, congenital syphilis (historical)
• Medications: Prostaglandins, long-term corticosteroids (rare).

Clinical Features

• Pain (deep, aching, worse at night/activity)
• Swelling, tenderness over affected bone
• Limited range of motion (if near joint)
• Deformity (late, e.g., HOA clubbing)

Diagnosis

• X-ray: Periosteal reaction (solid, laminated, spiculated, Codman's triangle).
• CT/MRI: Extent, soft tissue involvement, marrow signal.
• Bone scan: Increased uptake.
• Labs: ALP, inflammatory markers, hormone levels, fluoride.

Treatment

Target underlying cause. Symptomatic: rest, NSAIDs, bisphosphonates (Paget's), octreotide (acromegaly), smoking cessation (HOA). Surgery for deformity/nerve compression.