CPT® Code 28104

The CPT® Code 28104 refers to the excision or curettage of a bone cyst or benign tumor located in the tarsal or metatarsal bones, excluding the talus or calcaneus. A bone cyst is defined as a fluid-filled cavity within the bone, which can vary in type and presentation. The most common form is the unicameral or simple bone cyst, recognized as a benign lesion that typically does not pose significant health risks. Another type, the aneurysmal bone cyst, is characterized by a vascular structure surrounding a blood-filled cystic lesion, which may require more complex management. Additionally, benign bone tumors such as giant cell tumors, chondromyxoid fibromas, and enchondromas can also necessitate surgical intervention. The procedure associated with CPT® Code 28104 involves making an incision over the affected area of the tarsal or metatarsal bone, followed by careful dissection of the surrounding soft tissues to expose the lesion. If a cystic lesion is identified, the surgeon creates a window in the bone to access the cyst, aspirating its fluid for laboratory analysis. The curettage process involves using a curette to meticulously remove the lining of the cystic cavity. In cases where benign tumors are present, the excision technique is employed, which entails removing the tumor along with a margin of healthy bone to ensure complete removal and minimize the risk of recurrence.