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14448 Pathology

A 72-year-old man with a significant smoking history presents to the emergency room with complaints of dyspnea and truncal, arm, and facial swelling for one week. Physical examination is remarkable for facial erythema and facial, truncal, and arm edema with prominence of thoracic and neck veins. On chest x-ray, there is a mass in the right mediastinum with adenopathy. Which of the following is the MOST likely diagnosis?

AAdenocarcinoma
BHodgkin's lymphoma
CLarge cell carcinoma
DSmall cell carcinoma
Pathology
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14453 Microbiology

Complement is a series of impoant host proteins which provide protection from invasion by foreign microorganisms. Which one of the following statements best describes complement?

AComplement inhibits phagocytosis
BMicroorganisms agglutinate in the presence of complement but do not lyse
CComplement plays a minor role in the inflammatory response
DComplement protects the host from pneumococcal and Haemophilus infection through complement components C1, C2, and C4
Microbiology
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