In simple words: Acute hematogenous osteomyelitis of the radius and ulna is a bone infection in the forearm (radius and ulna bones) that starts suddenly, spreads through the bloodstream, and causes pain, swelling, and sometimes fever.

Acute hematogenous osteomyelitis of the radius and ulna refers to an infection and inflammation of the bone that has a rapid onset or a short course, and occurs through an infection in the bloodstream.

Example 1: A 6-year-old child presents with fever, pain, and swelling in the forearm. Imaging reveals inflammation and infection in the radius and ulna, consistent with acute hematogenous osteomyelitis., A 10-year-old child with a recent history of a bloodstream infection develops localized pain, redness, and warmth in the forearm. MRI confirms the diagnosis of acute hematogenous osteomyelitis of the radius and ulna., An adult with a history of intravenous drug use presents with fever, bone pain, and swelling in the forearm. Blood cultures and bone biopsy confirm acute hematogenous osteomyelitis caused by Staphylococcus aureus.

Documentation should include type of osteomyelitis, causative organism (if known), location (radius and ulna), laterality (left or right), and temporal factors (acute onset).