Rapid enlargement of elastofibroma dorsi after physical therapy

Elastofibroma dorsi is an uncommon, slow-growing, ill-defined soft tissue tumor. Its most prominent symptom is back and shoulder pain. Elastofibroma dorsi is usually located beneath the scapula and bilateral involvement occurs in only 10% of patients. We report herein a case of bilateral elastofibroma dorsi who underwent physical therapy for treatment of shoulder pain. Elastofibroma was misdiagnosed and rapidly progressed after physical therapy. We conclude that elastofibroma should be kept in mind for patients with shoulder or back pain, and the patient should be evaluated carefully before initiating physical therapy.