Magnetic resonance imaging of the spinal marrow: Basic understanding of the normal marrow pattern and its variant

Table 1 Vertebral bone marrow chemical composition and cellular buildup

Marrow phenotype	Chemical composition	Cellular components
Red marrow	40%-60% lipids	60% hematopoietic cells
	30%-40% water	40% fat cells
	10%-20% proteins
Yellow marrow	80% lipids	95% fat cells
	15% water	5% hematopoietic cells
	5% proteins