A 22-Year-Old Man Sees His Physician Because of Painful Enlargement

question 7

Multiple Choice

A 22-year-old man sees his physician because of painful enlargement of the testis. On gross examination, the tumor measures 4 cm in diameter and is dark red. Histologically, it is composed of mononuclear cytotrophoblastic and multinucleated syncytiotrophoblastic cells surrounded by blood and necrotic tissue. Serologic studies would most likely show that the patient's blood contains elevated levels of which of the following hormones?

• A) Alpha-fetoprotein
• B) External iliac lymph nodes
• C) Androstenedione
• D) Estriol
• E) Inhibin

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Definitions:

Directional

In research, directional usually refers to a hypothesis that specifies the direction of an expected difference or relationship.

µ > 164

A mathematical condition indicating that the population mean is greater than 164.

One-tailed

Describes a hypothesis test or statistical analysis where the significance is tested in only one direction, indicating the expected direction of an effect.

Directional

In hypothesis testing, directional refers to a hypothesis that specifies the direction of an expected difference or relationship (e.g., greater than, less than) between two groups or variables.