Question

A 21-year-old male visits with his family doctor at the urging of his parents when home...

A 21-year-old male visits with his family doctor at the urging of his parents when home for Spring Break. The parents are concerned because their son has lost a significant amount of weight. The young man is concerned because he is experiencing a heart rate of 120bpm while at rest and much higher when exercising. Additionally, his blood pressure averages 137/82 based upon four recordings. He has a recurring headache, tremors in his hands and suffers dyspnea.

This individual has been generally health for his entire life, eats a reasonably good diet and is very active, thus the above symptoms are concerning. Standard blood tests show normal levels of blood cells, however there is an elevated amount of metadrenalines (metabolite by-product of adrenaline) and the urinalysis also shows an elevated amount of metabolites of catecholamines. The physician then orders a 24-hour urine test where the patient collects urine at regular intervals for a 24-hour period. The patient is warned to avoid stimulants such as cocoa and caffeine during this time period. The results of this test confirm elevated metabolites of catecholamines. The physician suspects a condition called pheochromocytoma, which is a (usually) non-cancerous tumor of the adrenal gland. This tumor causes the excess secretion of catecholamines. To confirm this suspicion, the physician orders a specialized type of CT scan, called MBIG. This type of scan utilizes radioactive iodine as a contrast agent for visualization of masses as described above. A sample of MIBG results is shown below:

The MIBG confirms the presence of a tumor on the adrenal gland and the young man is scheduled for surgery to remove the mass. It is non-cancerous and he resumes his life. As a side note, current estimates are that only about 10% of adrenal tumors are cancerous.

3. Identify four possible side effects of catecholamines on the body. (1 pt)

Homework Answers

Answer #1

Answer: Pheochromocytoma are tumors that arise from chromaffin cells that secrete catecholamines.If diagnosed early and accurately,can be managed with both medical and surgical interventions and can be cured.If the disease is malignant or not managed or detected early,it could be fatal.

Four possible side effects of catecholamines on body:

1-Hypertension

2-Headache

3-Tremors

4-Weight loss ,if the condition is chronic .

Other side effects include-Palpitation,chest pain,dyspnea, dizziness,diaphoresis, etc.

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