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Case of the Week 441




What is the most likely diagnosis?

  • 41 year-old male with change in mental status



Unenhanced CT of Abdomen

  1. Caval leiomyosarcoma
  2. Wilms tumor
  3. Cirrhosis
  4. Pheochromocytoma
  5. Carcinoid tumor

Additional Image - Contrast-enhanced CT of abdomen

 

Additional Images

 

Contrast-enhanced CT of abdomen

 


Answer:

.


4. Pheochromocytoma

.

.

More (Click Discussion Tab)


 

Pheochromocytoma

 

General Considerations

  • Rare, catecholamine-secreting, neuroendocrine tumor usually found in medulla of the adrenal gland originating in the chromaffin cells
    • Extra-adrenal tumors called paraganglioneuromas
  • Most often produces epinephrine and norepinephrine (mostly) which is unregulated by any feedback mechanism
    • Sometimes dopamine is secreted
  • About 10 % are malignant

MORE . . .


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This Week
41 year-old male with change in mental status
 
Presented as a series of cards, this podcast asks some of the most common causes of neuroimaging findings and diseases making it ideal for a quick review. Can be used as either an audio only or audio/video podcast.; Complements Video Flashcard Podcasts 15, 21,25, 38, 42, 46 and 47.
 
 
Some of the fundamentals of interpreting chest images
 
The top diagnostic imaging diagnoses that all medical students should recognize according to the Alliance of Medical Student Educators in Radiology
 
Recognizing normal and  key abnormal intestinal gas patterns, free air and abdominal calcifications
 
Recognizing the parameters that define a good chest x-ray; avoiding common pitfalls
 
How to recognize the most common arthritides


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LearningRadiology.com
is an award-winning educational website aimed primarily at medical students and radiology residents-in-training, containing  lectures, handouts, images, Cases of the Week, archives of cases, quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, GU cardiac, bone and neuroradiology.