Shortness of breath in a 68 y/o man

Diagnosis 3

At this time, which of the following is the most likely etiology of the patient’s restrictive cardiomyopathy? (You may select only one option.)

Restrictive cardiomyopathy due to cardiac amyloidosis

Your choice is correct. This is the most likely diagnosis.
Your choice is correct. This is not the most likely diagnosis.
Your choice is incorrect. This is the most likely diagnosis.
Your choice is incorrect. This is not the most likely diagnosis.
Biopsy results are consistent with amyloid cardiomyopathy, and there are extracardiac manifestations such as macroglossia on physical exam.

Restrictive cardiomyopathy due to cardiac sarcoidosis

Your choice is correct. This is the most likely diagnosis.
Your choice is correct. This is not the most likely diagnosis.
Your choice is incorrect. This is the most likely diagnosis.
Your choice is incorrect. This is not the most likely diagnosis.
Biopsy results are not consistent with sarcoid cardiomyopathy, and there are no extracardiac manifestations of sarcoidosis.

Restrictive cardiomyopathy due to hemochromatosis

Your choice is correct. This is the most likely diagnosis.
Your choice is correct. This is not the most likely diagnosis.
Your choice is incorrect. This is the most likely diagnosis.
Your choice is incorrect. This is not the most likely diagnosis.
Serum ferritin level is normal.

Restrictive cardiomyopathy due to hypereosinophilic syndrome

Your choice is correct. This is the most likely diagnosis.
Your choice is correct. This is not the most likely diagnosis.
Your choice is incorrect. This is the most likely diagnosis.
Your choice is incorrect. This is not the most likely diagnosis.
Biopsy results are not consistent with this diagnosis, and the CBC does not show hypereosinophilia.