The Medial Femoral Condyle Flap: A Novel Versatile Tool for Complex Microvascular Maxillofacial Reconstruction

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The article describes the medial femoral condyle (MFC) corticoperiosteal flap as a vascularized bone option for complex maxillofacial reconstruction, particularly valuable when prior radiation, contamination, or infection make nonvascularized grafts or implants less reliable. Although widely used for small extremity bone defects, its use in head and neck—especially midface, orbit, and nasal reconstruction—has been sparsely reported.<br /><br />The authors present a retrospective case series of seven consecutive patients (2018–2021) undergoing oncologic midface reconstruction using MFC flaps. Harvest is performed with the patient frog-legged; the descending genicular vessels are identified and dissected for pedicle length, and cutaneous perforators are preserved when a skin paddle is needed. The flap can be contoured and fixed with minimal hardware (press-fit, sutures, or miniplates). Its periosteum supports bone healing and may mucosalize or accept skin grafting for nasal lining.<br /><br />All seven flaps survived. One patient required re-exploration for arterial thrombosis, successfully salvaged. No donor-site complications occurred. All patients received postoperative radiation (two were re-irradiated). During a mean 9.4-month follow-up, there were no cases of nonunion, bone/hardware extrusion, or osteoradionecrosis. Among patients with orbital reconstruction, none reported diplopia or visual disturbance.<br /><br />Illustrative cases include: (1) full-thickness dorsal nasal defect reconstructed with a chimeric MFC (bone plus skin paddle); (2) anterior maxillary wall reconstruction with chimeric MFC, using soft tissue to obliterate the maxillary sinus; and (3) a flow-through chimeric design combining MFC with a medial sural artery perforator flap to address orbital floor and lining/obliteration needs while overcoming limited pedicle length.<br /><br />The authors conclude the MFC flap is a safe, versatile tool for small osseous or osseous-composite craniofacial defects and should be considered in microsurgical head and neck reconstruction.

Keywords

medial femoral condyle flap

MFC corticoperiosteal flap

vascularized bone graft

midface reconstruction

maxillofacial microsurgery

orbit and nasal reconstruction

descending genicular vessels

chimeric flap design

post-radiation craniofacial defects

oncologic head and neck reconstruction