8. Bone marrow hyperplasia
Long bones:
Diffuse osteoporosis,
Medullary expansion,
Cortical thinning,
Coarse trabeculations (reactive sclerosis of the 2ry bone
trabeculae after destruction of the primary trabeculae), &
Enlargement of the nutrient foramina.
9.
10. Bone marrow hyperplasia
Skull:
Widening of the diploic space.
Thinning of the inner & outer table (complete resorption of the outer
table may occur).
Prominent 2ry trabeculae (hair on end appearance).
The occipital bone is spared as it lacks hemopoietic bone marrow.
12. Facial bones:
Hypopneumatization of the frontal, maxillary & sphenoid
sinuses (which are filled with marrow containing bone).
The ethmoid sinuses are spared.
Prominent malar eminences.
Anterior & medial displacement of the developing teeth.