Question

question 24 (mandatory) (2 points) listen a 9 - year - old boy complains of 2 weeks of pain in the hip. he has fever. lab studies show an elevated esr. an x - ray reveals a mottled radiolucent defect in the upper femur, with abundant periosteal new bone formation. a biopsy of the lesion demonstrates a staphylococcus infection within a fragment of necrotic bone embedded in a fibrinopurulent exudate. which of the following terms best describes the necrotic bone? sequestrum brodies abscess involucrum osteogenesis neoformans cloaca

Explanation:

A sequestrum is a fragment of dead bone that has become separated from healthy bone due to infection. In this case, the boy has a Staphylococcus - infected, necrotic bone fragment embedded in a fibrinopurulent exudate. Brodie's abscess is a chronic, localized form of osteomyelitis. An involucrum is new bone formed around the sequestrum as a reaction to infection. Osteogenesis neofomans is not a recognized term related to this context. A cloaca is a passage connecting an abscess cavity to the surface.

Answer:

A. Sequestrum