Aneurysmal Bone Cyst: Ace oncology structured oral Exam

Key Medical Takeaway

We review everything you need to understand about Aneurysmal Bone Cyst: Ace Your Oncology Structured Oral Exam. An oncology structured oral examination highlights aneurysmal bone cysts (ABC) as lesions with fluid levels on MRI. Diagnosis requires excluding osteoblastoma, giant cell tumours, or telangiectatic osteosarcoma. Treatment involves curettage and grafting, but ABCs have a recurrence rate up to 50%.

📖 Clinical Article

oncology Structured oral examination question 7: Aneurysmal bone cyst EXAMINER : This is a 20-year-old man who presents with pain in his proximal left tibia. What do you make of his MRI scan? (Figure 7.7.) CANDIDATE : This is an axial T2 image, which shows a lesion in the postero-lateral tibia. It appears well circumscribed with a sclerotic margin, is eccentrically placed, and there are multiple

Illustration 1 for Aneurysmal Bone Cyst: Ace Your Oncology Structured Oral Exam — Clinical Radiograph / Orthopedic Image

Figure 7.7 Aneurysmal bone cyst.
septations and loculations with fluid levels. These appearances would be in keeping with an aneurysmal bone cyst.
EXAMINER : That’s right. What’s the normal management for these? CANDIDATE : Firstly it’s important to confirm the diagnosis and I would always discuss bony lesions of this type with a bone tumour MDT. Aneurysmal bone cysts can often form as a reactive change to another benign lesion, for example an osteoblastoma or giant cell tumour, which needs to be ruled out. The differential diagnosis of an aneurysmal bone cyst also includes a telangiectatic osteosarcoma, which would require very different management. In general, treatment of aneurysmal bone cysts is with curettage and grafting, but the recurrence rate can be as high as 50%.