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Testing to Diagnose Hormone-Secreting Pituitary Tumors

Pituitary adenomas account for approximately 15% of intracranial tumors. Management of these benign tumors requires diagnosis of the specific intrasellar disease and comprehensive, multidisciplinary treatment of local mass effects and peripheral endocrinopathies. Since tumors can produce different hormones, their consequences and management vary widely. Continue reading “Testing to Diagnose Hormone-Secreting Pituitary Tumors”

Interpretation of Dengue Diagnostic Tests

Dengue virus infection produces a broad spectrum of symptoms, many of which are non-specific. Thus, a diagnosis based only on clinical symptoms is unreliable. Early laboratory confirmation of clinical diagnosis may be valuable because some patients progress over a short period from mild to severe disease and sometimes to death. Early intervention may be life-saving.
Continue reading “Interpretation of Dengue Diagnostic Tests”

Serologic Testing for the Diagnosis of Hepatitis B Virus (HBV) Infection

The antigens and antibodies associated with HBV infection include HBsAg (Australia antigen) and antibody to HBsAg (anti-HBs), hepatitis B core antigen (HBcAg) and antibody to HBcAg (anti-HBc), and hepatitis B e antigen (HBeAg) and antibody to HBeAg (anti-HBe). At least one serologic marker is present during the different phases of HBV infection.
Continue reading “Serologic Testing for the Diagnosis of Hepatitis B Virus (HBV) Infection”

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