Table 1.

The Early Stages of HO Are Characterized by Inflammation (Indicated in This Table With the Patient's Increased CRP and ESR Levels) and Elevated Alkaline Phosphatase

Test	Results	Normal Range
CRP	0.745 (H) mg/dL	0.000-0.500 mg/dL
ESR	19 (H) mm/h	0-15 mm/h
Antinuclear antibodies test	Negative	Negative
HLA-B27	Negative	Negative
Ca	10.5 (H) mg/dL	8.6-10.2 mg/dL
Alkaline phosphatase	108 (H) U/L	25-100 U/L

CRP, C-reactive protein; ESR, erythrocyte sedimentation rate.

These laboratory studies were obtained 16 months after his injuries.