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Trigger finger due to phalangeal osteochondroma of an adult: A case report
Hoi Young Kwon1, Hong Je Kang1
1Department of Orthopedic Surgery, School of Medicine, 65433Wonkwang University Hospital, Iksan, Korea.
Insights
Trigger finger, a condition affecting the A1 pulley, can rarely be caused by osteochondroma, a benign bone tumor. This case highlights a solitary osteochondroma in a young adult, successfully treated with surgical removal.
Area of Science:
- Orthopedics
- Hand Surgery
- Oncology
Background:
- Trigger finger (stenosing tenosynovitis) commonly affects adults aged 40-50 and children under 8.
- Tumors near flexor tendons are a rare cause of trigger finger.
- Osteochondroma-induced trigger finger is exceptionally rare, particularly in adults.
Observation:
- A 21-year-old patient presented with trigger finger symptoms.
- The cause was identified as a solitary osteochondroma on the proximal phalanx of the left middle finger.
- Symptoms resolved completely following surgical excision of the osteochondroma.
Findings:
- This case represents a rare instance of trigger finger caused by a solitary osteochondroma in a young adult.
- The unusual demographic and etiology underscore the importance of considering non-idiopathic causes.
- Diagnostic imaging, including X-rays and ultrasonography, proved valuable in identifying the tumor.
Implications:
- Clinicians should consider tumors as a potential cause of trigger finger, especially in patients with atypical presentations.
- Prompt diagnosis and surgical intervention can effectively resolve symptoms caused by osteochondromas.
- This case expands the understanding of trigger finger etiologies beyond common idiopathic causes.
Abstract:
Trigger finger is stenosing tenosynovitis that occurs in A1 pulley. It usually occurs idiopathically in patients' 40s and 50s. On the other hand, pediatric trigger finger usually occurs before 8 years old in pediatric patients. Even though being rare, a tumor occurred in the soft tissue or bone near flexor tendons can cause a trigger finger. Trigger finger due to osteochondroma is very rare. Furthermore, most cases of trigger finger due to osteochondroma occur in pediatric patients with hereditary multiple osteochondromatosis (HMO). The authors report this case of a trigger finger caused by a solitary osteochondroma that occurred in the proximal portion of the proximal phalanx of the left middle finger, of a 21-year-old patient. The symptoms were relieved after excision of the osteochondroma. If a patient with unusual demographics visits, the cause of trigger finger may not be idiopathic. Evaluation methods such as x-rays and ultrasonography can be helpful to rule out other causes, such as tumors.
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