Orbital rule 18: Orbital bony lesions

•          Sclerotic lesions such as :-

•           

1-Fibrous dysplasia(orbital roof).

•          2-Meningioma en plaque(common in lateral orbital wall )(ch.ch. By bone sclerosis).

•          3-Paget’s disease.

•          4-Sclerotic deposits.

•           

Lytic lesions such as :-

•          1-Congenital defect in the greater wing of sphenoid seen in neurofibromatosis and encephalocele.

•          2-Pressure erosion by a long standing lesion(arachnoid cyst , dermoid cyst).

•          3-Destruction by orbital tumor.

•          4-Destruction by direct extension.

•          5-Destruction by metastases.

•           If adult : lung , breast and kidney

If child  : neuroblastoma , Ewing ‘s sarcoma