Bilateral Palmar and Plantar Erythema with Pruritus: Differential Diagnosis
The most common causes of bilateral redness and itching on palms and soles are chemotherapy-induced palmar-plantar erythrodysesthesia (hand-foot syndrome), contact dermatitis from irritants like hand sanitizers, and systemic conditions including chronic liver disease, chronic kidney disease, and rheumatoid arthritis. 1, 2
Primary Diagnostic Considerations
Medication-Induced Causes (Most Common in Clinical Practice)
Chemotherapy-related palmar-plantar erythrodysesthesia (PPE) is the leading cause when patients are on cytotoxic agents, particularly:
- Capecitabine (oral 5-FU precursor) - most frequently associated with PPE 3, 2
- Liposomal doxorubicin 2
- 5-fluorouracil (5FU) 2
- Cytarabine 2
The presentation typically includes dysesthesia, tingling, erythema progressing to burning pain with dryness, cracking, and desquamation, with palms more frequently affected than soles 2. Management requires dose reduction or temporary cessation of the offending chemotherapy agent 3.
Other medications causing palmar erythema (though typically without plantar involvement or pruritus):
- Amiodarone, gemfibrozil, cholestyramine (with hepatic damage) 1
- Topiramate and albuterol (with normal liver function) 1
Contact Dermatitis
Irritant contact dermatitis from frequent hand sanitizer use has emerged as a significant cause, particularly during the COVID-19 pandemic 4. The condition resolves with cessation of excessive sanitizer use 4.
Systemic Disease Associations
Hepatic Disease
Chronic liver cirrhosis causes palmar erythema in 23% of patients due to abnormal serum estradiol levels 1. This typically presents as erythema without significant pruritus, making it less likely when itching is prominent.
Chronic Kidney Disease
CKD causes generalized pruritus in 42-60% of patients with end-stage renal disease, though this typically presents as generalized itching rather than localized palmar-plantar symptoms 5. When pruritus is generalized, check urea and electrolytes in all patients 5.
Rheumatologic Disease
Rheumatoid arthritis manifests palmar erythema in >60% of patients and is associated with favorable prognosis 1. This would typically be accompanied by joint symptoms.
Endocrine Disorders
- Thyrotoxicosis: up to 18% have palmar erythema 1
- Diabetes mellitus: 4.1% develop palmar erythema (more common than necrobiosis lipoidica diabeticorum at 0.6%) 1
Malignancy
15% of patients with primary or metastatic brain neoplasms may have palmar erythema, postulated to be from increased angiogenic factors and estrogens from solid tumors 1.
Clinical Pitfalls and Key Distinctions
Critical history points to elicit:
- Recent chemotherapy exposure (especially capecitabine) 3, 2
- Excessive hand sanitizer or irritant exposure 4
- Symptoms of liver disease, kidney disease, or rheumatologic conditions 1
- Timing: PPE typically occurs within 2-3 weeks of chemotherapy initiation 3
Physical examination focus:
- Palms more affected than soles suggests PPE or systemic disease 2
- Bilateral symmetric involvement is characteristic of systemic causes 1
- Look for stigmata of chronic liver disease, joint inflammation, or thyroid disease 1
Diagnostic Workup Algorithm
Initial laboratory evaluation should include:
- Complete blood count with differential 6
- Comprehensive metabolic panel (renal and liver function) 6
- Iron studies (ferritin, serum iron, TIBC) 6
Additional testing based on clinical suspicion:
- Thyroid function tests if endocrine features present 1
- Rheumatoid factor/anti-CCP if joint symptoms 1
- Imaging if malignancy suspected 1
Management Approach
If chemotherapy-related: Immediate dose reduction or temporary cessation with oncology consultation 3, 2
If contact dermatitis: Discontinue offending irritant (hand sanitizer, cleaning products) 4
If systemic disease identified: Treat underlying condition, though this may not fully resolve palmar manifestations 1