The characteristic feature of striated bone tumor (osteopathia striata) is the presence of band-like or striated dense shadows on the bones, particularly in the metaphysis of long bones.

bubble_chart Etiology

Unknown, it is a congenital developmental defect. It is autosomal dominant inheritance.

bubble_chart Pathological Changes

Under the microscope, these striations are seen as aggregates of cancellous bone tissue, with no structural abnormalities. The other components of the bone show no pathological manifestations.

bubble_chart Clinical Manifestations

Asymptomatic. Occasionally, grade I joint pain. Limb length discrepancy may occur occasionally, but whether it is related to this disease remains unclear.

**Radiographic findings** are characteristic. In most bones of the body, linear or band-like dense streaks can be observed, starting from the metaphysis and extending to the mid-diaphysis, parallel to the long axis. Between these streaks, there are areas of reduced density, and the streaks may also extend into the epiphysis. The skull, hands, and clavicles are usually unaffected, but the calcaneus and talus may be involved. The appearance in the ilium is distinctive, with fan-shaped radial arrangements extending from the acetabulum to the iliac crest, sometimes appearing as patches or speckled patterns. The bone cortex is slightly denser than normal but without destruction. The density of these streaks may gradually increase, eventually occupying the entire metaphysis.

bubble_chart Diagnosis

The diagnosis relies entirely on X-rays, and most cases are discovered incidentally. The presence of striated bone can also occur in other diseases and should be ruled out. These include osteopetrosis (marble bone disease), dyschondroplasia (Ollier disease), melorheostosis, osteopoikilosis, and Engelmann disease.

The disease is asymptomatic and does not affect function, so no treatment is necessary.