Which of the following would be an example of ectopic hormone production?

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Enhance your knowledge with the Ciulla Clinical Chemistry Test. Study with interactive quizzes, featuring flashcards and multiple-choice questions. Each question offers hints and explanations for better understanding. Prepare effectively and excel in your exam!

Multiple Choice

Which of the following would be an example of ectopic hormone production?

Explanation:
Ectopic hormone production occurs when tissue outside the normal endocrine gland starts secreting a hormone. In this case, a lung tumor secreting growth hormone fits that pattern because growth hormone is normally produced by the pituitary gland, not the lungs. The tumor in the lung releases GH independently of pituitary control, leading to hormone excess without a pituitary source. The other examples involve hormones produced by the gland where that hormone normally resides (prolactin from the pituitary, calcitonin from the thyroid, cortisol from the adrenal cortex), so they are not ectopic.

Ectopic hormone production occurs when tissue outside the normal endocrine gland starts secreting a hormone. In this case, a lung tumor secreting growth hormone fits that pattern because growth hormone is normally produced by the pituitary gland, not the lungs. The tumor in the lung releases GH independently of pituitary control, leading to hormone excess without a pituitary source.

The other examples involve hormones produced by the gland where that hormone normally resides (prolactin from the pituitary, calcitonin from the thyroid, cortisol from the adrenal cortex), so they are not ectopic.

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