Osteochondral autograft transplantation of the femoral head in sequelae of developmental dysplasia of hip: A case report and review of the literature
Burak Kaymaz1, Sancar Bakırcıoğlu2, Güney Yılmaz2, Özgür Ahmet Atay2, Mehmet Cemalettin Aksoy2
1Department of Orthopedics and Traumatology, Medicine Faculty of Çanakkale Onsekiz Mart University, Çanakkale, Turkey
2Department of Orthopedics and Traumatology, Medicine Faculty of Hacettepe University, Ankara, Turkey
Keywords: Femoral head, hip dysplasia, osteochondral autograft, surgical hip dislocation.
Although osteochondral autograft transplantation (OAT) in the knee and ankle has gained much popularity on the other hand the technique has rarely been applied in the femoral head. In this article, we present a 15-year-old female patient with unstable chondral lesion on the right femoral head. She had a history of open reduction for developmental dysplasia which resulted in avascular necrosis. She had coxa magna, breva and trochanteric overgrowth along with an unstable chondral lesion on the superolateral part of the femoral head. She underwent OAT for chondral lesion, femoral head reshaping and relative neck lengthening. Her Harris Hip Score improved from 55 to 90 in the 18 months of follow-up. The case is unique in a way that the autografts were harvested from the anterior part of the same femoral head that was already intended to be removed during osteochondroplasty.
Avascular necrosis (AVN) of the femoral head is one of the most common complications after treatment for developmental dysplasia of the hip (DDH). Depending on the type and severity of AVN, the femoral head loses its round shape which can also compromise acetabular development. Deformed head may cause femoroacetabular impingement and chondral lesions and degenerative joint disease may arise.
For older patients, total hip arthroplasty is the most effective treatment option; however, this is often not feasible for young and active patients. Recently, salvage of the young adult hip with deformed femoral head has been forwarded. Ganz et al. have demonstrated that their surgical approach to the hip with dislocation and osteochondroplasty of the head-neck junction can be applied with favorable results.
Treatment of chondral lesions of the hip joint is problematic due to the deep anatomy and complex biomechanical demands.[4,5] Several treatment methods have been adapted from the knee joint; however, the biomechanics and anatomy of the hip joint are different from the knee.[6,7] Autologous osteochondral grafting is a well-described treatment option for full thickness cartilage lesions particularly in the knee and ankle. However, the results of osteochondral autograft transplantation (OAT) for femoral head cartilage lesions are not well known.
In this case report, we present the surgical technique of OAT in a patient with severe hip pain and catching due to osteochondral lesion of the femoral head. The deformed femoral head with large cartilage defect was treated successfully with surgical hip dislocation, OAT, osteochondroplasty and relative neck lengthening. The case differs from the other case reports in the literature since the etiology was hip dysplasia and the osteochondral grafts were harvested from the removed part of the same femoral head during osteochondroplasty.
A 15-year-old girl patient presented to the outpatient clinic with the complaints of pain, catching and locking in her right hip. She had limping and limited hip range of motion. The patient’s past surgical history included an open reduction for DDH when she was 18 months of age. On physical examination, the patient was limping and hip movements were restricted, painful at the limits of the abduction and internal rotation. The impingement sign was positive. Plain radiographs were obtained and deformed femoral head with sagging rope sign was noted. The femoral neck was short and trochanteric overgrowth was noted (Figure 1a, b). Computed tomography and magnetic resonance imaging (MRI) scans confirmed the osteochondral lesion located on the superolateral and central part of the femoral head (Figure 1c, d). The preoperative Harris Hip Score (HHS) of the patient was 55. Patient was thought to be a good candidate for either to repair or reconstruct the osteochondral lesion, reshaping of the femoral head and relative neck lengthening for trochanteric overgrowth. With this surgical plan, she was scheduled for surgical hip dislocation. A written informed consent was obtained from the legal guardian of the patient.
General anesthesia was applied and she was placed in the lateral decubitus position. A standard safe surgical dislocation of the right hip was performed as described by Ganz et al. Special attention was given to identifying femoral head-neck morphology including offset, as well as severity and location of damage to the femoral and acetabular articular cartilage and the acetabular labrum. Approximately 2¥3 cm chondral lesion of the femoral head was confirmed intraoperatively (Figure 2a). The fragment was unstable and avascular. So, a reconstruction type procedure (OAT) was opted rather than fixation. The labrum was intact. Chondral lesion was debrided. Anterolateral aspect of aspheric femoral head which was planned to be removed to improve femoral head morphology was used for graft harvesting (Figure 2b). Osteochondral autograft transplantation was performed with six plugs (five 8 mm and one 6 mm; DePuy osteochondral autograft transplantation system, DePuy Mitek Inc., Raynham, Massachusetts, USA) (Figure 2c). Attention was given to reconstruct the roundness of the femoral head by altering the deepness of the recipient holes and osteochondral fragments in the donor site. Next, the femoral head-neck junction was debrided utilizing osteotomes and a high- speed burr to improve offset (osteochondroplasty) (Figure 2d). The femoral head was reduced and presence of impingement was confirmed. Then, the extended posterior retinacular flap which contains the deep branch of the medial femoral circumflex artery was developed after incomplete osteotomy of the posterior part of the stable trochanter. After the flap was composed, posterosuperior part of the stable trochanter was trimmed away until the level of the superior femoral neck (Figure 2d). The capsule was repaired. The trochanteric fragment was advanced distally. When a satisfactory increase in the head center-trochanteric distance was accomplished, the trochanteric fragment was fixed with 4.5 mm cannulated and cortical screws. With trochanteric advancement, improvement of abductor lever arm along with relative femoral neck lengthening was accomplished (Figure 3).
Range of motion exercises using continuous passive motion and quadriceps strengthening exercises were initiated in the postoperative period. A maximum 90° of hip flexion was allowed for the first three weeks. Active abduction was prohibited for six weeks and the patient was instructed nonweight-bearing mobilization for three months. No complications were encountered during the postoperative period. In the third month control, the hip pain was decreased significantly. She had no complaint of locking in her hip joint. Hip movements were pain free even at the limits of the abduction, flexion and internal rotation. She was allowed to walk without crutches. Harris Hip Score increased to 90, she had no hip pain, her limping was improved, the trochanteric fragment was healed and she was satisfied with her result. After 18 months of follow- up, control MRI of the right hip indicated integration of the osteochondral plugs with no significant femoral head step-off (Figure 4).
Depending on its severity, AVN of the femoral head causes different deformities. Deformed head may cause femoracetabular impingement, chondral lesions, degenerative joint disease and abnormal gait.[1,10,11] Surgical dislocation and osteochondroplasty with trochanteric advancement addresses the pathologic femoral head morphology and improves the abductor lever arm.
Osteochondral autograft transplantation was first described by Hangodyand Füles and gained popularity to treat cartilage defects in the knee and ankle. The procedure aims to replace the damaged hyaline cartilage with healthy hyaline cartilage harvested from a nonweight-bearing portion of the knee joint.
Although OAT in the knee and ankle has gained much popularity, the technique has rarely been applied in the femoral head (Table I).[15-17] Nam et al. reported two cases with femoral head chondral defects after traumatic hip dislocation which were treated with osteochondral plugs harvested from the knee and inferior portion of the femoral head. Hart et al. reported a case in which a defect of 16 mm of the femoral head due to a penetrating screw was treated with OAT from the ipsilateral lateral femoral condyle. But they used a posterior approach and did not dislocate the hip which is different from our case. Gagala et al. reported OAT for femoral head AVN by surgical dislocation in 20 patients and stated that OAT was a successful treatment method at precollapse stage. Anthonissen et al. reported OAT for the treatment of a large defect (2¥2.5 cm) due to trauma with good outcome.
|Follow-up||Defect size||Harvest site||Preoperative
|Kilicoglu et al.||27/M||Sequelae of AVN||SHD||8 years||NR||Knee||55||96|
|Soteranos et al.||32/M||Osteonecrosis||SHD||66 months||NR||Nonweight-bearing portion
of femoral head
|Gagala et al.||34/M||Trauma sequelae||SHD||80 months||NR||Knee||NR||98|
|20/M||Trauma sequelae||SHD||62 months||NR||Knee||NR||100|
|43/M||Trauma sequelae||SHD||24 months||NR||Knee||NR||90|
|Nam et al.||15/M||Trauma sequelae||SHD||12 months||20 5 mm||Knee||NR||NR|
|21/M||Trauma sequelae||SHD||5 years||10 mm2||Nonweight-bearing portion
of femoral head
|Hart et al.||28/M||Trauma sequela||SHD||6 months||14 mm||Knee||69||100|
|Kubo et al.||37/F||OCD||Arthroscopic||NR||8.5 mm2||Knee||NR||NR|
|Çetinkaya et al.||42/F||Impingement||Arthroscopic||2 years||12 mm2||56||87.6|
|37/F||Impingement||Arthroscopic||2.5 years||8 mm2||58||90|
|Güngör et al.||22/F||Impingement||SHD||14 months||2.7 cm2||Knee||52||93|
|23/F||Impingement||SHD||12 months||3.6 cm2||46||85|
|Won et al.||31/M||Trauma sequelae||SHD||12 months||2.5 1 cm||Knee||NR||82|
|Louahem et al.||15/F||OCD||SHD||4 years||2 cm2||Nonweight-bearing portion||65||96|
|16/F||OCD||SHD||18 months||1.5 cm2||of femoral head||53||100|
|Emre et al.||22/M||LCPD||SHD||3 years||8 18 mm||Knee||43||96|
|Anthonissen et al.||20/M||Trauma sequelae||SHD||2 years||2 2.5 cm||Knee||NR||82|
|Girard et al.||10 cases
Mean age: 18
|6 LCPD, 4 MED||SHD||Mean 29.2
of femoral head
|52.8 (35-74)||79.5 (65-93)|
|(range, 15-21)||(range, 20-39)|
|HSS: Harris Hip Score; AVN: Avascular necrosis; SHD: Surgical hip dislocation; NR: Not reported; OCD: Osteochondritis dissecans; LCPD: Legg Calve Perthes disease; MED: Multiple epiphyseal dysplasia.|
There is limited literature regarding osteochondroplasty together with OAT. Güngör et al. reported osteochondral OAT along with osteochondroplasty of the femoral head in femoroacetabular impingement in two patients. Patients received surgical dislocation and osteochondral cylinders for OAT were removed from the ipsilateral knee.
Our patient had an unstable cartilage fragment in a large area at the weight-bearing zone of the femoral head. The fragment was avascular and had no bony connection with femoral head. We believed that fixation of the fragment or a valgus producing osteotomy of the proximal femur in order to move the defective area out of weight-bearing zone would not achieve satisfactory result. The patient had a large femoral head due to previous AVN which was more apparent in the anterior part. We opted to treat the cartilage defect with OAT and used the anterior aspect of aspheric femoral head as a donor site. The anterolateral part of the head was planned to be removed for femoral head reshaping. We obtained autografts with a diameter of 8 mm (five) and 6 mm (one) from the anterolateral part of the same femoral head. Our case is unique in the literature since the removed part of femoral head was used as a donor site for osteochondral grafts. So, the patient was saved from an unnecessary knee procedure. The patient also had osteochondroplasty and relative neck lengthening along with OAT. In addition, etiologies for OAT in the literature include Legg Calve Perthes disease, epiphyseal dysplasia, osteochondritis dissecans or trauma. Our case had sequelae of DDH and differs in terms of etiology.
In conclusion, safe surgical hip dislocation has changed the treatment approaches for many hip pathologies in young adults. As a result, we believe that OAT is an effective treatment method for osteochondral lesions of the femoral head. Although the most common source of the autograft is the knee, aspheric portion of the femoral head can also be used in selected cases and an unnecessary knee surgery can be avoided.
The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.
The authors received no financial support for the research and/or authorship of this article.
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