Aetiology
Injury of the intrinsic muscles, fascia or tendons of the thumb at the wrist or hand level is typically caused by a direct blow or repetitive strain. It can also be caused by a fall onto an outstretched hand.
Diagnosis
Diagnosis of an injury of the intrinsic muscles, fascia or tendons of the thumb at the wrist or hand level is usually made through a physical examination. This includes assessing the range of movement and strength of the thumb, as well as palpation of the injured area. An X-ray may be used to confirm the diagnosis and rule out any associated fractures.
Differential diagnosis
Other conditions that must be considered in the differential diagnosis of an injury of the intrinsic muscles, fascia or tendons of the thumb at the wrist or hand level include carpal tunnel syndrome, De Quervain’s tenosynovitis, and trigger finger.
Treatment
Treatment for an injury of the intrinsic muscles, fascia or tendons of the thumb at the wrist or hand level usually consists of rest and immobilization. Non-steroidal anti-inflammatory medications can be used to reduce pain and swelling. Physical therapy may be necessary to restore strength and range of motion. In more severe cases, surgery may be indicated.
Prognosis
The prognosis for an injury of the intrinsic muscles, fascia or tendons of the thumb at the wrist or hand level is usually good if the injury is treated promptly and appropriately. Most patients make a full recovery with little or no residual symptoms.