A Newborn Boy Is Found to Have Markedly Elevated Serum

question 241

Multiple Choice

A newborn boy is found to have markedly elevated serum TSH and low thyroxine on routine screening.  Laboratory findings using a venous blood sample confirm the diagnosis.  The patient was born at 39 weeks gestation to a 34-year-old healthy woman, who had been taking prenatal vitamins regularly.  He has no symptoms or abnormal findings on clinical examination.  Imaging studies reveal an ectopic thyroid gland just below the tongue.  Which of the following is the most likely cause of this patient's otherwise normal physical examination despite abnormal thyroid laboratory findings?

• A)Excess thyroxine production by an ectopic thyroid
• B)Increased thyroid-binding globulin in pregnancy
• C)Transplacental transfer of thyroid-stimulating antibody
• D)Transplacental transfer of thyroxine
• E)Transplacental transfer of TSH

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Definitions:

Behavior

Pertains to the actions or reactions of an individual or a group in response to external or internal stimuli, encompassing physical movements and psychological processes.

Desirable Social Qualities

The traits or characteristics that are generally appreciated and sought after in social interactions and contexts, such as kindness, empathy, and respectfulness.

LMX Theory

Stands for Leader-Member Exchange Theory, suggesting that leaders develop unique one-to-one relationships with each of the people reporting to them.

High-Exchange Relationship

A type of relationship between leader and follower characterized by high levels of trust, respect, and mutual obligation.