What questions should I ask when I suspect amyloidosis or sarcoidosis?

Questions to Ask When Suspicious About Amyloidosis or Sarcoidosis

When evaluating a patient for possible cardiac amyloidosis, systematically inquire about specific red flag symptoms and clinical features that dramatically increase diagnostic probability, particularly focusing on bilateral carpal tunnel syndrome, peripheral neuropathy with autonomic dysfunction, unexplained heart failure with preserved ejection fraction in older adults, and low-flow low-gradient aortic stenosis. 1

Key Historical Questions for Amyloidosis

Cardiac and Systemic Symptoms

• Heart failure symptoms: Ask about progressive dyspnea, exercise intolerance, abdominal bloating, early satiety, and severe fatigue 1
• Orthostatic symptoms: Inquire about syncope, lightheadedness, and whether the patient has recently needed to reduce or discontinue antihypertensive medications (especially beta-blockers or ACE inhibitors) - this is a critical red flag 1
• Angina: Ask about chest pain even without known coronary disease, as amyloid deposits around coronary microvasculature can cause ischemia 1

Musculoskeletal and Neurological Features

• Bilateral carpal tunnel syndrome: This is one of the strongest clinical predictors - specifically ask if the patient has had carpal tunnel release surgery on both hands, particularly if it preceded heart failure symptoms 1
• Peripheral neuropathy: Question about numbness, tingling, or burning sensations in extremities 1
• Dysautonomia: Ask about orthostatic hypotension, erectile dysfunction, bowel/bladder dysfunction, and abnormal sweating patterns 1

AL Amyloidosis-Specific Features

• Macroglossia: Ask if the patient has noticed tongue enlargement or difficulty with speech/swallowing 2
• Periorbital purpura: Inquire about easy bruising around the eyes, particularly after minor trauma or Valsalva maneuvers 2
• Unexplained bleeding: Ask about coagulopathy or factor X deficiency manifestations 2
• Renal symptoms: Question about unexplained proteinuria, foamy urine, or nephrotic syndrome 2, 1
• Hepatomegaly: Ask about right upper quadrant fullness or early satiety 2

Age and Demographics

• Age over 60 years: Particularly important for ATTR amyloidosis, which affects approximately 5% of patients over 70 years 2, 1
• Family history: Ask about relatives with unexplained heart failure, neuropathy, or known amyloidosis (for hereditary ATTR) 3

Cardiac-Specific Questions

• Arrhythmias: Ask about atrial fibrillation/flutter, palpitations, or ventricular arrhythmias 1
• Aortic stenosis: In patients over 60, specifically ask about known valve disease, particularly low-flow low-gradient AS with preserved EF 1
• Conduction abnormalities: Inquire about pacemaker placement or heart block 1

Key Historical Questions for Sarcoidosis

Pulmonary Symptoms

• Respiratory complaints: Ask about chronic cough, dyspnea, chest pain, and wheezing 4
• Constitutional symptoms: Question about fevers, night sweats, and weight loss (B symptoms) - their absence with bilateral hilar adenopathy is highly suggestive of sarcoidosis 4

Cardiac Manifestations

• Ventricular arrhythmias: This is critical - ask about palpitations, syncope, or documented ventricular tachycardia (present in 53.3% of cardiac sarcoidosis patients vs only 10.7% in amyloidosis) 5
• Heart block: Inquire about conduction abnormalities or pacemaker/ICD placement (66.3% of CS patients have ICDs) 5
• Heart failure symptoms: Ask about dyspnea and exercise intolerance, though these are less specific 4

Extracardiac Sarcoidosis Features

• Skin lesions: Ask about lupus pernio (violaceous skin lesions on nose, cheeks, ears), erythema nodosum, or other skin changes 4
• Ocular symptoms: Question about uveitis, blurred vision, eye pain, or photophobia (Heerfordt's syndrome includes uveitis, parotid enlargement, fever, and facial nerve palsy) 4
• Neurological symptoms: Ask about cranial nerve palsies, particularly facial nerve involvement 4
• Lymphadenopathy: Inquire about enlarged lymph nodes, particularly in the neck or mediastinum 4
• Joint symptoms: Question about arthritis or arthralgias, particularly in the context of Löfgren's syndrome (bilateral hilar adenopathy, erythema nodosum, and arthritis) 4

Demographics and Risk Factors

• Age: Cardiac sarcoidosis patients are typically younger (mean age 62 years vs 78 years for amyloidosis) 5
• Race: Higher prevalence in African Americans and Northern Europeans 4

Critical Differentiating Features

The most important distinguishing questions between amyloidosis and sarcoidosis relate to arrhythmic burden and age: Cardiac sarcoidosis patients are younger, have dramatically higher rates of ventricular tachycardia (53.3% vs 10.7%), and more frequently require ICD placement (66.3% vs 13.0%), while amyloidosis patients are older with more prominent infiltrative features like increased wall thickness and bilateral carpal tunnel syndrome 5.

Common Pitfalls to Avoid

• Don't rely solely on heart failure symptoms - they overlap significantly between both conditions
• Don't dismiss the diagnosis in younger patients with amyloidosis or older patients with sarcoidosis, though age patterns differ
• Don't overlook the importance of bilateral carpal tunnel syndrome - this is often present years before cardiac amyloidosis diagnosis
• Don't forget to ask about recent discontinuation of antihypertensives - this paradoxical need to stop blood pressure medications in a previously hypertensive patient is a major clue for amyloidosis 1