A painful mass in the jaw

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Figure 1
Computed tomography of the neck on presentation was notable for a mass in the ramus of the left mandible with a large soft-tissue component (circle) within the left masticator space.
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Figure 2
Computed tomography of the abdomen demonstrating a 4.7-cm lesion in the dome of the right hepatic lobe (arrow) containing hyperdense material with hypodense areas, likely related to earlier transarterial chemoembolization treatment.
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Figure 3
Magnetic resonance imaging of the abdomen reveals a 1.7-cm lesion in hepatic segment 6 (left arrow) and a 1.6-cm hypoenhancing lesion within the inferior pole of the spleen (right arrow).

TABLE 1

Interpretation of hepatitis B serologic markers

Infection phase	Serologic marker
Infection phase	HBsAg^a	Total anti-HBc^b	IgM antibody to anti-HBc^c	Anti-HBs^d
No current infection	Negative	Negative	Negative	Negative
Immunity due to past infection	Negative	Positive	Negative	Positive
Immunity due to vaccination	Negative	Negative	Negative	Positive
Acute infection	Positive	Positive	Positive	Negative
Chronic infection	Positive	Positive	Negative	Negative
Other ^e	Negative	Positive	Positive or negative	Negative

↵a Hepatitis B surface antigen.
↵b Total antibody to hepatitis B core antigen.
↵c Immunoglobulin M antibody to hepatitis B core antigen.
↵d Antibody to hepatitis B surface antigen.
↵e Possibilities include resolved infection (most common), resolving acute infection, “low-level” chronic infection, and no current infection due to false-positive anti-HBc.