Dupuytren Contracture

Populations and Risk Factors

• Males over 40 years of age: male-to-female ratio approximately 7:1 to 10:1; prevalence increases significantly after age 50
• Strong genetic component: autosomal dominant with variable penetrance; Northern European ancestry has highest prevalence (up to 30% of Scandinavian males over 60); often called "Viking disease" due to the geographic distribution
• "Dupuytren diathesis" (aggressive phenotype): bilateral involvement, early onset (before age 50), family history, and ectopic fibromatosis (Ledderhose disease of plantar fascia, Peyronie disease, Garrod knuckle pads) — indicates more aggressive disease with higher recurrence after surgery
• Diabetes mellitus: prevalence of Dupuytren is 2-3 times higher in diabetic patients, though contractures tend to be milder; the mechanism involves advanced glycation end-products damaging fascial tissue
• Chronic alcohol use and liver disease: associated with increased risk, possibly through hepatic fibrosis pathways
• Smoking: vasoconstriction reduces palmar fascial blood supply, promoting the ischemia-fibrosis cycle
• Manual labor with vibration exposure: epidemiological association, though the direct causal link is debated
• Possible link to anomalous collagen fiber quality shared with adhesive capsulitis — both conditions involve pathological collagen deposition and contracture

Causes and Pathophysiology

The Ischemia-Fibroplasia Cycle

• The initiating event is local ischemia within the palmar fascia. The palmar aponeurosis has a relatively limited blood supply, and any factor that reduces perfusion (microvascular disease, repetitive compression, genetic predisposition) creates a hypoxic environment.
• Ischemia triggers the release of free radicals (reactive oxygen species), which stimulate fibroblast proliferation and transformation into myofibroblasts — contractile cells that combine the collagen-producing properties of fibroblasts with the contractile properties of smooth muscle cells.
• Myofibroblasts produce Type III collagen (thinner, less organized, more flexible than the normal Type I collagen of mature fascia). This is the same collagen type found in early wound healing — the fascia essentially enters a perpetual wound healing state.
• The newly deposited Type III collagen crosslinks and contracts, shortening and thickening the fascial bands. This contraction compresses local blood vessels, worsening the ischemia and perpetuating the cycle: ischemia → free radicals → myofibroblast proliferation → Type III collagen → contraction → more ischemia.
• This self-reinforcing cycle explains why Dupuytren is progressive and irreversible without intervention — the pathological process feeds itself.

Nodule-Cord-Contracture Progression

• Stage 1 — Nodule: The first clinical finding is one or more firm, painless nodules in the palmar fascia, most commonly at the distal palmar crease overlying the 4th or 5th metacarpal heads. The nodules represent focal myofibroblast proliferation. They may be mildly tender initially but typically become painless. Patients often notice them incidentally.
• Stage 2 — Cord formation: As myofibroblast activity continues, the nodules coalesce and extend distally along the pretendinous bands of the palmar aponeurosis, forming palpable, inelastic cords that run longitudinally toward the fingers. The cords represent organized fibrotic tissue replacing normal fascia. At this stage, active extension begins to be restricted — the cords physically tether the finger.
• Stage 3 — Contracture: The cords progressively shorten, pulling the MCP joint into fixed flexion first (the pretendinous band inserts into the base of the proximal phalanx). As the disease advances, lateral digital cords develop and draw the PIP joint into flexion. The DIP joint is typically spared. The end result is a hand with one or more fingers permanently flexed into the palm, unable to extend.

MCP Then PIP Involvement

• The MCP joint is affected first because the pretendinous bands of the palmar aponeurosis cross the MCP joint directly — cord shortening pulls the proximal phalanx into flexion. MCP contractures respond well to surgical release because the joint capsule usually remains compliant.
• The PIP joint is affected later as the disease extends distally through the lateral digital cords (natatory ligament, spiral bands). PIP contractures are more problematic — the PIP volar plate and accessory collateral ligaments become secondarily contracted, creating a fixed deformity that persists even after cord excision. PIP contracture is the primary determinant of functional disability and surgical complexity.
• The DIP joint is almost never affected because the palmar fascial system does not extend to the distal phalanx.

Digital Nerve Vulnerability

• As cords develop and contract, they can displace or encase the digital nerves (the common and proper digital nerves run immediately deep to the palmar fascia). Spiral cords are particularly dangerous because they rotate the neurovascular bundle from its normal lateral position to a more central, superficial location — directly in the surgical field. This displacement is why Dupuytren surgery carries a risk of digital nerve injury, and why the surgeon must identify nerve position before cord excision.

Signs and Symptoms

By Stage

General Presentation

• Painless shrinking and thickening of palmar fascia — the condition is characteristically painless, which distinguishes it from trigger finger, tenosynovitis, and other painful hand conditions
• Tight, thick bands of connective tissue that can be seen and palpated running from the palm toward the affected fingers
• Inability to extend fingers normally while flexion remains completely normal — the flexor tendons are not involved; the restriction is purely fascial
• Typically affects the 4th (ring) and 5th (little) digits first, though any finger can be involved; thumb and index finger are least commonly affected
• Slow, progressive course over months to years — may have periods of apparent stability followed by progression
• Skin changes: puckering, dimpling, and adherence of skin to underlying cords (the skin becomes tethered to the fibrotic fascia)
• Bilateral involvement in approximately 45% of cases, though severity is usually asymmetric

Assessment Profile

Subjective Presentation

• Chief complaint: "I have a lump in my palm that won't go away"; "my fingers are curling in and I can't straighten them"; "I can't lay my hand flat on the table"; "I'm having trouble putting on gloves and shaking hands"; patients may present with functional complaints before they notice the contracture itself
• Pain quality: Typically painless — this is a defining feature. Early nodules may be mildly tender. If significant pain is present, consider differential diagnoses (trigger finger, tenosynovitis, Dupuytren with concurrent nerve compression). Secondary joint discomfort may develop from the chronically flexed position.
• Onset: Insidious; patients often cannot identify when the nodule first appeared. The condition is noticed when functional limitation develops (cannot flatten hand, difficulty gripping). Progression is gradual over months to years. No traumatic precipitant (distinguishes from flexor tendon injury or trigger finger onset).
• Aggravating factors: Activities requiring full hand opening (gripping large objects, shaking hands, putting on gloves, placing hand flat on a surface); no specific positions worsen the pathology itself — the contracture is constant
• Easing factors: No position or activity relieves the contracture — it is a fixed structural change. Warm soaking may improve tissue pliability temporarily but does not alter the contracture.
• Red flags: Rapid onset of hand/finger contracture with pain and inflammation — consider other diagnoses (infection, Volkmann ischemic contracture, emergency referral if post-trauma with compartment syndrome signs). New contracture with weight loss and constitutional symptoms — consider palmar fibromatosis associated with malignancy.

Observation

• Local inspection: Visible palmar nodules (firm, raised lumps at the distal palmar crease); longitudinal cords running from the palm toward the 4th and 5th fingers; skin puckering and dimpling overlying the cords (skin tethered to fascia); affected fingers held in flexion — MCP flexion contracture alone in earlier disease, MCP + PIP flexion in advanced disease; skin may appear thickened and adherent. Check bilateral hands (45% bilateral). Look for ectopic fibromatosis: Garrod knuckle pads (thickened nodules over the dorsal PIP joints), plantar nodules (Ledderhose disease).
• Posture: Not a postural condition; however, patients may unconsciously hide the affected hand or adapt grip patterns. Occupational assessment: note how the contracture affects the patient's work and daily activities.
• Gait: Not applicable

Palpation

• Tone: The palmar fascia itself is the primary finding — firm, inelastic, cord-like tissue running longitudinally from the palmar crease toward the affected digits. Intrinsic hand muscles (lumbricals, interossei) may show some adaptive shortening in chronic cases. Forearm flexors are unaffected — normal tone (this distinguishes Dupuytren from neurological causes of hand contracture).
• Tenderness: Nodules may be mildly tender to palpation in early stages; cords and contractures are typically painless to palpation — this painlessness is diagnostically significant. Digital nerve sensitivity should be assessed: if palpation of the cord produces shooting or electric sensation into the digit, the cord may be encasing or displacing the digital nerve.
• Temperature: Normal — there is no inflammatory process producing heat in established Dupuytren (unlike trigger finger or tenosynovitis). Warmth would suggest an alternative or concurrent diagnosis.
• Tissue quality: Nodules feel firm, well-circumscribed, and immobile (adherent to the palmar fascia). Cords feel rigid, inelastic, and ropy — they do not stretch with gentle traction (distinguishing them from normal fascial tissue). Overlying skin is tethered and does not glide freely over the cords. Joint play at the MCP and PIP joints: end-range extension is blocked by the cord, not by capsular restriction — this is confirmed by the finding that passive extension applied slowly reaches the same limitation regardless of force (the cord is inelastic, not guarding).

Motion Assessment

• AROM: Active flexion is full and pain-free at all joints — the flexor tendons are completely unaffected. Active extension is limited — the degree of extension deficit is measured at each affected joint (MCP and PIP independently). The deficit is constant and does not change with warm-up, repeated attempts, or after exercise — distinguishing it from the variable restriction of muscle spasm or guarding.
• PROM / end-feel: Passive extension reaches the same limitation as active extension — PROM equals AROM for extension, because the restriction is a fixed fascial contracture, not a muscular deficit. The end-feel is characteristically firm and unyielding (like stretching a leather strap) — distinct from the capsular end-feel of joint restriction or the spasm end-feel of muscle guarding. This firm, inelastic end-feel with no give is diagnostically pathognomonic.
• Resisted testing: Grip strength may be reduced due to the mechanical disadvantage of the flexed finger position, but this is a biomechanical consequence, not intrinsic muscle weakness. Resisted finger extension is limited by the cord, not by extensor muscle weakness — the extensors are normal. If true extensor weakness is found (weak resisted extension without cord restriction), suspect motor nerve pathology (ulnar nerve palsy) rather than Dupuytren.

Special Test Cluster

Progression monitoring: The Tabletop test and goniometric measurement should be repeated at regular intervals (every 3-6 months) to track disease progression and determine the appropriate timing for surgical referral. A change of more than 5 degrees of extension deficit over 6 months suggests active progression.

Differential Diagnoses