Researchers have outlined a new minimally invasive method for treating femoral-neck unicameral bone cysts, aiming to reduce tissue damage while providing immediate structural support.
Technique Details
Patients are placed supine on a traction table, with the opposite leg abducted to allow C-arm imaging. A small incision near the vastus ridge initiates access to the lesion.
Under fluoroscopy, a guidewire is driven into the center of the defect, aligned with the head-neck axis without entering the joint. An 11 mm drill creates a lateral cortical window for initial curettage.
A second proximal incision, about 5 cm above the greater trochanter, permits insertion of a second guidewire following the shaft axis. Imaging confirms correct placement before a similar cortical opening is fashioned.
Through the distal window, a 2.7 mm, 30° arthroscope is introduced with saline irrigation. The cavity is inspected, and the fibrous lining is removed using curettes, forceps, and an arthroscopic shaver until the interior appears clear.
After thorough irrigation, tissue samples are sent for histopathology. The centromedullary nail is then advanced over the guidewire to the predetermined depth, delivering immediate fixation.
Synthetic bone graft material fills the space through the lateral window, guided by fluoroscopy. A blade or lag screw follows the same trajectory, and a bicortical cortical screw secures distal locking.
Final imaging checks confirm proper implant positioning and graft fill. Incisions close with interrupted sutures, completing the operation.
Clinical Context
Compared with traditional open curettage, this combined endoscopic and intramedullary approach limits muscle disruption and may shorten rehabilitation. Earlier reports of open surgery often required extended immobilization, increasing the risk of joint stiffness.
In similar orthopedic settings, minimally invasive techniques have shown faster return to weight-bearing activities. Applying that experience here suggests patients could begin controlled motion sooner, potentially lowering overall recovery time.
Immediate stability from the nail allows early mobilization, which is important for preserving hip function in adults. The method also standardizes steps, making it reproducible across surgical teams.
The procedure is described in detail by Jinhong Wang and colleagues. Their report appears in the Indian Journal of Orthopaedics, volume 60, pages 1695-1700, published in 2026. The article’s DOI is https://doi.org/10.1007/s43465-025-01684-z.
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