Master Hands and Paediatric Orthopaedics: Diagnose & Treat
Key Takeaway
Discover the latest medical recommendations for Master Hands and Paediatric Orthopaedics: Diagnose & Treat. Dupuytren's contracture, a condition often discussed in hands and paediatric orthopaedics, involves flexion of the finger joints due to fibrous tissue thickening in the palm. Risk factors include family history, liver disease, high alcohol intake, diabetes, and epilepsy. Histology reveals myofibroblast cells and thick collagen fibres. Management ranges from observation to surgical options like fasciotomy or fasciectomy.
A 55-year-old male of Scandinavian descent presents with the hand deformity shown below. He is a retired laborer and is concerned about the progression of his condition. How would you systematically approach his clinical assessment?
Candidate: I would start by confirming the diagnosis of Dupuytren's disease. I’ll take a history focusing on family history, alcohol, smoking, and diabetes to screen for the "diathesis." On exam, I'll document the contractures at the MCP and PIP joints, look for other stigmata like Garrod's pads, and perform the Hueston tabletop test to assess functional severity.
Focusing only on the hand itself. A failing candidate often neglects the systemic nature of "Dupuytren’s diathesis" and fails to mention the importance of documenting neurovascular status or the specific anatomical cords involved, which is critical for surgical planning.
Structure your answer: 1) History: Age, ethnicity, occupation, smoking/alcohol, and screening for diathesis (Peyronie’s, Ledderhose, Garrod’s pads, family history). 2) Examination: Goniometric measurement of MCP/PIP contractures, skin quality (dimpling/pitting), vascular assessment (Allen’s test), and sensory testing. 3) Assessment: Use the Hueston tabletop test to determine surgical thresholds and risk-stratify for recurrence based on the presence of diathesis factors.
During your planning for surgical fasciectomy, you discuss the anatomy of the "spiral cord." Why is this structure clinically significant in the context of avoiding iatrogenic complications?
Candidate: The spiral cord is a pathological fusion of four structures: the pretendinous band, spiral band, lateral digital sheet, and Grayson’s ligament. It is dangerous because it physically displaces the digital neurovascular bundle anteriorly and medially, putting the nerve at high risk during dissection.
Simply identifying that the nerve is "in the way" is insufficient. A high-scoring candidate must explicitly name the four components of the spiral cord and explain the anatomical shift—specifically, that the nerve is pulled superficial and central—which is why the "proximal-to-distal" dissection rule is vital.
Define the spiral cord as a composite of the pretendinous band, spiral band, lateral digital sheet, and Grayson’s ligament. Explain that as it contracts, it displaces the neurovascular bundle superficially and centrally. Emphasize that the surgeon must identify the bundle in normal, healthy proximal tissue before proceeding distally to safely dissect the nerve away from the cord.
The patient asks about his options for treatment. He is worried about surgery. How do you counsel him regarding the indications for intervention versus needle fasciotomy or collagenase injection?
Candidate: Indications for surgery are typically MCP contractures >30 degrees or any functional impairment. For those avoiding surgery, I can offer PNF or collagenase, but I must warn them of higher recurrence rates compared to fasciectomy, especially for PIP joints.
Failing to mention the specific risks associated with different modalities. For example, failing to mention that needle fasciotomy is contraindicated for complex, recurrent cords or that collagenase has specific risks of skin tears and tendon rupture.
Systematize by modality: Fasciectomy is the gold standard for durable correction but is invasive. PNF is minimally invasive, good for elderly/high-risk patients, but has high recurrence (up to 65%). Collagenase avoids surgery but carries risks of skin rupture and tendon injury. Highlight that PIP joint contractures are notoriously harder to treat and have a higher risk of recurrence, which should drive the surgical decision-making.
