Jul 6–12, 2026 · 22 new studies, 10 reviews · Hand & Upper Extremity archive · All weeks
The new Hand & Upper Extremity research The Reduction sent the week of Jul 6–12, 2026, with the week’s most recent reviews, each with a one-line summary.
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Epidemiology and Clinical Implications of Scaphoid Morphology Based on Morsy Classification.
Type I scaphoids predominate at 80% prevalence in the general population; type II scaphoids show higher left-handedness but no other demographic differences.
Ultrasound-guided carpal tunnel release and mini-open release show similar long-term outcomes, though ultrasound reduces early incisional pain.
Older women have significantly lower lunate bone density and strength than younger women, suggesting age-related fragility fracture mechanism.
Ulnar neuroma-in-continuity after distal radius fracture is rare but treatable with nerve allograft and dynamic tendon transfer, achieving functional recovery when early investigation identifies structural nerve injury.
Stepwise surgical approach for triggering distal to the A2 pulley after A1 pulley release.
Persistent trigger finger distal to A2 pulley after A1 release treated successfully with stepwise approach including ulnar flexor digitorum superficialis slip excision and flexor tenoplasty.
Palmar trapezoid dislocation is exceptionally rare but recognizable; dorsal open reduction with ligament repair and temporary fixation preserves anatomy and prevents avascular necrosis.
Merkel Cell Carcinoma of the Hand.
Merkel cell carcinoma of the hand is rare and aggressive, requiring early diagnosis through high clinical suspicion, wide excision, and adjuvant radiation to optimize patient outcomes.
First US thumb osseointegration using preangulated implant achieved successful opposition, improved hand function, and sensation within 13 months, establishing feasibility of single-stage digital reconstruction.
Brief ultrasound training improved orthopedic providers' accuracy for detecting nerve lacerations and intact nerves but remained limited for neuroma identification, with performance independent of device type.
Neighborhood socioeconomic deprivation was not associated with clinically meaningful delays to carpal tunnel surgery, suggesting equitable access to specialist care and treatment.
Flatter lunate facet inclination angles increase mechanical stress on the lunate, suggesting this anatomical parameter may contribute to Kienböck disease development.
Mesenchymal stem cell exosomes combined with hyaluronan scaffolds enhance tendon-to-bone healing through improved vascularization and growth factor expression in preclinical models.
Synovial Chondromatosis of Hand and Wrist: A Case Series.
Synovial chondromatosis of hand and wrist is rare but should be considered in differential diagnosis; total or subtotal synovectomy reduces recurrence after loose body removal.
The Sarcophagus technique combining intramedullary nailing with circumferential cortical strut allograft achieves 87.5% union rate in humeral shaft nonunion with favorable functional recovery and minimal complications.
Plates or K-Wires Fixation for Fifth Metacarpal Neck Fractures? A Comparative Study.
K-wire fixation and plate fixation showed equivalent clinical outcomes for fifth metacarpal neck fractures, but K-wires had fewer complications, making them preferable for initial surgical management.
Lateral epicondylar fractures in the pediatric population: Presentation, management, and outcomes.
Pediatric lateral epicondyle fractures are rare but frequently missed sports injuries; nondisplaced cases heal well with immobilization while displaced fractures require careful assessment for concomitant injuries.
Carpal tunnel release improves symptoms in hemodialysis patients but shows higher persistent CTS rates in those with >10 years on dialysis prior to diagnosis.
Structured training enables advanced practice providers to perform pediatric distal radial fracture reductions comparably to experienced residents with better retention and lower loss-of-reduction rates.
Pronator quadratus pedicled rotational flap based on anterior interosseous artery reliably covers dorsal and radial forearm and wrist defects, offering an alternative for local soft tissue reconstruction.
TRICARE's coverage of platelet-rich plasma injections without preauthorization increased utilization sixfold with questionable efficacy, highlighting risks of insurance coverage without evidence-based review.
Adjustable anterior rim plates for distal radius fractures beyond the watershed line significantly reduce tendon irritation compared to other fragment-specific fixation options.
Surgery for unmeasurable upper extremity neuropathy lacks objective diagnostic tests, raising ethical concerns about placebo effects and determining treatment effectiveness.
Integrated nerve and tendon transfers restore hand function in tetraplegia through tailored surgical reconstruction combined with comprehensive preoperative optimization and structured postoperative rehabilitation.
A Review of Transformers in Medical Research and Health Care.
Transformer artificial intelligence models show promise in medical research through self-attention mechanisms for analyzing text, images, and biological sequences, but face challenges with data quality, interpretability, and ethical concerns.
Advances in Imaging of Traumatic Nerve Injuries.
High-resolution ultrasound and magnetic resonance neurography effectively diagnose traumatic nerve injuries and guide surgical decision-making.
The role of orthobiologics in bone healing and joint and tendon degeneration in the upper limb.
PRP and MSCs show promise for bone healing but lack clinical evidence for tendinopathies and osteoarthritis; high-quality trials needed before widespread application in upper limb.
The failed adult traumatic brachial plexus reconstruction.
Failed brachial plexus reconstruction management includes late options such as tendon transfers, joint fusions, free functioning muscle transfers, and prosthetics tailored to patient goals.
Benign Bone Tumors of the Hand: Beyond Enchondromas.
Beyond enchondromas, hand surgeons should recognize benign bone tumors including osteogenic lesions, giant cell tumor, fibrous dysplasia, and unique entities like Nora lesions requiring distinct management approaches.
Radial height measurement lacks standardization in distal radius fracture literature, with substantial discrepancies that affect treatment decisions and outcomes.
Updates in diagnostic tools for diagnosing nerve injury and compressions.
Multimodal assessment combining clinical evaluation, electrodiagnostics, ultrasound, and MR neurography improves preoperative understanding of nerve injury severity and predicts functional recovery better than any single modality.
Principles and Evaluation of Bony Unions.
Nonunion diagnosis requires thorough history, exam, and imaging; advanced modalities help confirm union when diagnosis is unclear.
Use of nerve conduction studies in carpal tunnel syndrome.
Nerve conduction studies quantify median nerve demyelination and axonal loss, predict surgical outcomes, and monitor treatment response in carpal tunnel syndrome.
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