Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
Balance Foot & Ankle offers same-day appointments for urgent foot and ankle conditions across Southeast Michigan — but the most important factor in outcomes isn’t getting seen quickly. Our podiatrists explain what to do in the first 24-48 hours before your appointment that most patients skip entirely. Call (810) 206-1402 — expert podiatric care across Michigan.
| Feature | Pseudogout (CPPD) | Gout (MSU) | Septic Arthritis | Reactive Arthritis |
|---|---|---|---|---|
| Crystal Type | Calcium pyrophosphate dihydrate (CPPD) | Monosodium urate (MSU) | No crystals — bacteria present | No crystals — immune-mediated |
| Polarized Microscopy | Weakly positive birefringent (blue parallel to axis) | Strongly negative birefringent (yellow parallel) | No crystals; WBC >50,000; bacteria on Gram stain | No crystals; sterile fluid |
| Most Affected Joint | Knee (most common); ankle; wrist; 1st MTP (rare) | 1st MTP (podagra); ankle; knee | Any joint; knee most common | Ankle, knee; asymmetric; history of infection |
| Serum Uric Acid | Normal | Usually elevated (>6.8 mg/dL) | Normal | Normal |
| X-ray | Chondrocalcinosis (calcification within cartilage — triangular fibrocartilage at wrist; menisci at knee) | Normal acutely; punched-out erosions in chronic gout | Normal acutely; joint space loss if chronic osteomyelitis | Normal or periostitis |
| Associated Conditions | Hyperparathyroidism; hemochromatosis; hypomagnesemia; hypothyroidism; aging (>60) | Obesity; diuretics; renal disease; alcohol; purine diet | Immunocompromised; prior joint surgery; bacteremia | Chlamydia; GI infection; HLA-B27 |
| Treatment | Phase | Mechanism | Protocol | Notes |
|---|---|---|---|---|
| Joint Aspiration (Arthrocentesis) | Acute attack — diagnostic + therapeutic | Removes crystal-laden fluid; relieves pressure; confirms diagnosis | US-guided aspiration + crystal analysis under polarized microscopy | Essential to exclude septic arthritis before any injection |
| Intra-Articular Corticosteroid | Acute attack (first-line for monoarticular) | Directly suppresses crystal-induced synovitis post-aspiration | Triamcinolone 20–40mg after aspiration; reliable 2–4 week relief | Fastest and most effective single-joint treatment |
| NSAIDs | Acute attack (systemic) | COX inhibition reduces prostaglandin-mediated inflammation | Indomethacin 50mg TID × 5–7 days; or naproxen 500mg BID | Avoid in CKD, peptic ulcer, elderly patients |
| Colchicine | Acute attack; prophylaxis during chronically active disease | Inhibits neutrophil chemotaxis; less potent for CPPD vs gout but effective | 0.6mg BID × 3–5 days acute; 0.6mg daily for prophylaxis | Off-label for CPPD; works well despite primary gout indication |
| Treat Underlying Metabolic Cause | Prevention / recurrence reduction | Correcting hyperparathyroidism, hemochromatosis, or hypomagnesemia reduces CPPD deposition | Endocrinology/internal medicine referral; Mg supplementation if low | No drug directly dissolves CPPD crystals (unlike gout and urate-lowering therapy) |
Watch: TOP 5 Drinks to Reverse High URIC ACID & GOUT! — MichiganFootDoctors YouTube
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Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
When a patient presents with sudden, severe ankle joint swelling, redness, and pain—with no injury history—the differential diagnosis always includes gout, pseudogout, and septic arthritis (joint infection). Getting this distinction right is critical: septic arthritis requires emergency joint drainage and antibiotics; gout requires urate-lowering therapy; pseudogout (calcium pyrophosphate dihydrate crystal disease, or CPPD) requires anti-inflammatory management. Balance Foot & Ankle’s Dr. Tom Biernacki provides expert inflammatory arthritis evaluation for Michigan patients experiencing acute or recurrent joint attacks.
What Is Pseudogout?
Pseudogout is an inflammatory arthritis caused by deposition of calcium pyrophosphate dihydrate (CPPD) crystals in joint cartilage and synovial fluid. When these crystals shed into the joint space, they trigger an acute inflammatory cascade indistinguishable clinically from gout or infection—intense pain, warmth, swelling, and redness that peaks within 12–36 hours. The ankle is among the most commonly affected joints (alongside the knee and wrist). Attacks typically last 1–3 weeks without treatment and resolve spontaneously, though recurrence is common.
Who Gets Pseudogout?
Pseudogout is more common in older patients (risk increases dramatically after age 60), in patients with hyperparathyroidism, hemochromatosis, hypomagnesemia, hypothyroidism, and after joint trauma or surgery. It is not related to diet or alcohol like gout—making the distinction important for patient counseling. Family history can predispose some patients to earlier-onset disease. Pseudogout also causes a chronic pyrophosphate arthropathy pattern similar to osteoarthritis in repeatedly affected joints.
Diagnosis: The Critical Distinction
The gold standard diagnosis is joint aspiration and synovial fluid analysis—the only way to definitively distinguish pseudogout (CPPD crystals: rhomboid-shaped, weakly positively birefringent under polarized light) from gout (monosodium urate crystals: needle-shaped, strongly negatively birefringent) and septic arthritis (positive Gram stain and culture, elevated WBC in fluid). X-rays may show chondrocalcinosis—calcification of articular cartilage (the “railroad track” appearance in menisci and ankle joint)—supporting CPPD diagnosis. Serum uric acid does NOT distinguish gout from pseudogout. Blood inflammatory markers (CRP, ESR, WBC) are elevated in all three conditions.
Treatment of Pseudogout Attacks
Acute pseudogout attacks are treated with anti-inflammatory medications: NSAIDs (indomethacin, naproxen), colchicine, or corticosteroids (oral or intra-articular injection). Joint aspiration itself provides immediate therapeutic drainage and pain relief in addition to its diagnostic value. Unlike gout, there is no equivalent of allopurinol for pseudogout—no medication reliably prevents future attacks by reducing crystal burden. Hydroxychloroquine and low-dose colchicine have been studied for prophylaxis with variable results. Managing underlying metabolic conditions (hyperparathyroidism, hemochromatosis) may reduce attack frequency.
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Inter-attack period for inflammatory arthritis patients, ankle joint arthritis cushioning
Acute inflammatory attack (rest, ice, and medical treatment prioritized during attacks)
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✅ Pros / Benefits
- Joint aspiration provides both diagnosis AND immediate treatment—a dual-purpose procedure critical in inflammatory arthritis evaluation
- Accurate crystal identification prevents inappropriate treatment of pseudogout as gout (different urate-lowering strategy)
- Chondrocalcinosis on X-ray provides important diagnostic clue supporting CPPD before aspiration results return
❌ Cons / Risks
- No reliable preventive medication for CPPD—unlike gout management with allopurinol, long-term CPPD prevention is limited
- Septic arthritis must always be ruled out urgently before assuming pseudogout—delayed diagnosis of joint infection is catastrophic
- Recurrent attacks cause progressive joint damage over time in chronic CPPD arthropathy
Dr. Tom Biernacki’s Recommendation
Every acute ankle joint attack—especially in a patient without trauma history—gets my diagnostic attention. The question I always ask myself is: could this be septic arthritis? If there’s any fever, systemic symptoms, immunocompromise, or risk factors, that joint gets aspirated immediately and I’m not sending them home until the fluid comes back. Pseudogout and gout can both be managed with NSAIDs or colchicine; septic arthritis cannot wait. Once the diagnosis is confirmed as CPPD by crystal analysis, the treatment conversation is more straightforward—though I always counsel that recurrence is common and we need to look for underlying metabolic contributors.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
How do I know if my ankle swelling is gout or pseudogout?
You cannot reliably distinguish gout from pseudogout based on symptoms alone—both cause acute inflammatory joint attacks with intense pain, warmth, and swelling. The definitive distinction requires joint aspiration and synovial fluid analysis under polarized light microscopy: uric acid crystals (gout) versus CPPD crystals (pseudogout). Serum uric acid alone is unreliable as it can be normal during gout attacks and elevated without gout. Dr. Biernacki performs ankle aspiration and crystal analysis in the office.
Is pseudogout related to diet like gout?
No. Unlike gout—which is associated with high purine diet, alcohol, red meat, shellfish, and sugary beverages—pseudogout is not caused by dietary factors. It is related to calcium pyrophosphate crystal deposition influenced by age, metabolic conditions (hyperparathyroidism, hemochromatosis), and joint trauma history. Dietary modifications that help gout do not reduce pseudogout risk.
Can pseudogout cause permanent joint damage?
Yes. Recurrent pseudogout attacks cause progressive cartilage damage over years, leading to a chronic pyrophosphate arthropathy that resembles osteoarthritis but can affect the ankle, knee, or wrist atypically. Joints with repeated inflammatory attacks develop joint-space narrowing, osteophyte formation, and eventually functional impairment. Managing attacks aggressively and investigating metabolic contributors helps slow this progression.
Should I go to the emergency room for a sudden ankle attack?
If you have fever, cannot bear weight at all, have systemic symptoms (chills, malaise), or have risk factors for infection (recent surgery, immunocompromise, IV drug use, skin wounds near the joint), yes—seek emergency evaluation immediately to rule out septic arthritis. If this is a recurrent pattern identical to prior attacks without systemic symptoms, urgent podiatric or rheumatology evaluation is appropriate but not necessarily emergency-level.
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When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.