A 50-Year-Old Man Comes to the Office for Evaluation of Abdominal

question 640

Multiple Choice

A 50-year-old man comes to the office for evaluation of abdominal fullness and mild right flank pain.  He also reports a weight loss of 4.5 kg (10 lb) over the past 2 months.  The patient has no other medical issues and works in a local industrial chemical manufacturing facility.  Examination shows a soft abdomen.  Ultrasound reveals a mass in the right kidney.  A subsequent abdominal CT scan confirms the presence of a large right renal mass with evidence of necrosis.  The patient undergoes a right total nephrectomy.  The specimen is shown below. This patient's lesion most likely originated from which of the following portions of the kidney?

• A)Blood vessels
• B)Collecting duct cells
• C)Glomeruli
• D)Proximal renal tubules
• E)Renal pelvis lining

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Definitions:

Vacuum Tubes

Electronic components used in the early 20th century for amplification, switching, and signal modulation, before the advent of semiconductors.

Auto Industry

This refers to the sector of the economy that designs, develops, manufactures, markets, and sells motor vehicles.

Public Domain

Refers to creative works that have no exclusive intellectual property rights. These works are available for public use without the need to obtain permission or pay royalties.

Copyright Laws

Legal regulations that protect the rights of creators over their original works, preventing unauthorized use.