Evaluation and Management of Chronic Thumb Base and Lateral Wrist Pain

Initial Diagnostic Evaluation

The American College of Radiology recommends beginning with standard three-view radiographs (posteroanterior, lateral, and oblique) of the hand and wrist, as this is the most appropriate initial imaging study and will likely establish the diagnosis of thumb carpometacarpal (CMC) osteoarthritis in this clinical presentation 1, 2
Standard radiographs are essential and sufficient for diagnosis in most cases, showing joint space narrowing, osteophytes, and subluxation patterns, according to the American College of Radiology 1, 2
Advanced imaging (MRI, CT, ultrasound) is not indicated as initial evaluation unless radiographs are normal or show only nonspecific findings, as stated by the American College of Radiology 1, 2

The American College of Rheumatology recommends splinting as primary treatment, specifically using a full splint that covers both the thumb base AND wrist, as this provides superior pain relief compared to thumb-only splints (NNT = 4 for improving daily activities) 3, 4
Topical NSAIDs are the preferred pharmacological treatment for mild to moderate pain, as they provide equivalent pain relief to oral NSAIDs (effect size 0.77) without increased gastrointestinal complications, according to the American College of Rheumatology 3, 4, 5

Oral paracetamol (up to 4g/day) is recommended if topical NSAIDs are insufficient, as it has the best safety profile, as stated by the American College of Rheumatology 5
Oral NSAIDs at the lowest effective dose for the shortest duration are recommended if paracetamol fails, with the addition of gastroprotection (PPI or H2-blocker) in patients with GI risk factors, according to the American College of Rheumatology 3, 5
COX-2 inhibitors should be avoided in patients with cardiovascular risk factors, as recommended by the American College of Rheumatology 3, 5

Intra-articular corticosteroid injection may provide short-term benefit for painful flares, though evidence is limited and effects may not persist beyond one month, as stated by the American College of Rheumatology 6, 5
Intra-articular hyaluronan is an alternative with potentially more prolonged benefit than corticosteroid, according to the American College of Rheumatology 6

Surgery should be considered when conservative treatments fail AND the patient has marked pain and/or disability affecting quality of life, as recommended by the American College of Rheumatology 6, 5
Trapeziectomy alone is the recommended surgical approach, as combination procedures (trapeziectomy with ligament reconstruction and tendon interposition) provide no additional benefit but cause significantly more complications (RR 2.12, 95% CI 1.24-3.60), according to the American College of Rheumatology 6, 5

The American College of Radiology advises against ordering MRI or advanced imaging initially unless radiographs are normal, as this adds cost without diagnostic benefit 1, 2
The American College of Rheumatology recommends against using thumb-only splints when a full splint including the wrist provides better pain control 3, 4
The American College of Rheumatology advises against proceeding directly to oral NSAIDs without first trying topical NSAIDs, which have equivalent efficacy with better safety profiles 3, 4
The American College of Rheumatology recommends against performing complex surgical procedures when simple trapeziectomy provides equivalent outcomes with fewer complications 6, 5