- Case report
- Open Access
- Open Peer Review
Pathological fracture of the femur in Alagille syndrome that was treated with low-intensity pulsed ultrasound stimulation and an Ilizarov ring fixator: a case report
© Nozaka et al.; licensee BioMed Central Ltd. 2014
- Received: 22 February 2014
- Accepted: 4 July 2014
- Published: 8 July 2014
Alagille syndrome is a multisystem disorder, which is characterized by hypoplasia of the intrahepatic bile ducts, malformations of the cardiovascular system, eyes, and vertebral column, and abnormal facies. Several of the characteristics of Alagille syndrome may result in an especially high risk of fracture. The majority of patients suffer from chronic cholestasis, which can have a variety of adverse effects on bone metabolism. In Alagille syndrome, fractures primarily occur in the lower limb long bones in the absence of significant trauma.
A 9-year-old Japanese girl with Alagille syndrome was admitted to our institution with marked hyperbilirubinemia and a pathological fracture of the femur. She had been diagnosed with biliary atresia at the age of 1 month and treated with surgical bile duct reconstruction, vitamins D and K, and ursodeoxycholic acid. However, her liver dysfunction and hyperbilirubinemia worsened. The pathological fracture of the femur was treated with low-intensity pulsed ultrasound stimulation (LIPUS) and an Ilizarov ring fixator. Seventy-four days after surgery, the patient had anatomically and functionally recovered. There was no leg-length discrepancy and no angular malalignment of the lower extremities as measured clinically and radiographically. The range of motion of the hip, knee, and ankle of the patient’s operative leg matched the range of motion in the nonoperative leg.
To the best of our knowledge, there are no reports on use of the Ilizarov frame and LIPUS in diaphyseal femoral fractures in Alagille syndrome. This case report provides evidence that this procedure is successful for managing such diaphyseal fractures in Alagille syndrome.
- Alagille syndrome
- Low-intensity pulsed ultrasound stimulation (LIPUS)
- Ilizarov ring fixator
Alagille syndrome is a multisystem disorder, which is characterized by hypoplasia of the intrahepatic bile ducts, malformations of the cardiovascular system, eyes, and vertebral column, and abnormal facies . Major clinical features of this syndrome include jaundice, cholestasis, and congenital heart disease with peripheral pulmonary artery stenosis. Alagille syndrome is caused by mutations in the JAGGED1 gene in the overwhelming majority of cases, and by mutations in the NOTCH2 gene in 1–2% of cases [2–4]. A genetic test was not performed in our case because the diagnosis of Alagille syndrome was already established based on the presence of distinct clinical features.
Several of the characteristics of Alagille syndrome may result in patients having an especially high risk of fracture. The majority of patients suffer from chronic cholestasis , which can have a variety of adverse effects on bone metabolism. Hyperbilirubinemia inhibits osteoblast proliferation and induces osteoporosis. Most importantly, cholestasis leads to a deficiency of intestinal bile acids. This deficiency ultimately interferes with the absorption of vitamins and minerals that are critical to bone development, including calcium, vitamin D, and vitamin K. Management of a pathological lower extremity fracture in a child with Alagille syndrome can sometimes be a challenging problem in the orthopedic field. There are few reports of pathological fractures of the femur in Alagille syndrome. Case studies have documented multiple recurrent fractures in some patients  and poor healing and/or marked post-fractural deformities in others [7, 8]. We report a case of a 9-year-old girl with marked hyperbilirubinemia from birth who presented with a pathological fracture of the femoral shaft.
Alagille syndrome is rare, occurring in 1 in 70,000 births, and affects both sexes equally . Alagille syndrome is autosomally dominant with a low penetrance and highly variable expression. The Alagille gene has been identified in the 20pl2 region. This syndrome manifests as a multisystem disorder involving the liver, heart, eyes, face, and skeleton [1, 8]. One of the manifestations of Alagille syndrome is hyperbilirubinemia caused by cholestasis secondary to a paucity of interlobular bile ducts. Patients with chronic liver disease have an increased prevalence of osteoporosis because of calcium malabsorption caused by low levels of 25-hydroxy vitamin D3 and hyperbilirubinemia. Nonetheless, the underlying mechanism causing osteoporosis secondary to hyperbilirubinemia remains unclear. Patients with primary biliary cirrhosis and osteoporosis have higher serum bilirubin levels than those without osteoporosis. A high serum bilirubin level is independently associated with increased bone loss at the femur in patients with chronic liver disease. Exposure to excessive levels of bilirubin inhibits the proliferation of osteoblasts in cell cultures. Despite these findings, studies investigating the association between bilirubin levels and osteoclast function are lacking . In the present patient, long-term hyperbilirubinemia was associated with systemic osteoporosis.
Lin et al.  reported that, in patients with Alagille syndrome, fracture lesions deteriorated despite treatment, and all of the patients eventually succumbed. Many previous reports have described the management of diaphyseal femoral fractures in normal children. However, no clear consensus has been reached on the best way to treat diaphyseal femoral fractures in normal children [10–12]. Kapukaya et al.  reported that external fixation in closed femoral shaft fractures in children could be a rational alternative mode of therapy because it has some advantages and can be easily removed without undergoing a second round of anesthesia. The rationale for this technique is immediate weight-bearing.
Many studies regarding the effects of LIPUS on bone have been reported, including an acceleration of endchondral ossification of the callus at the fracture site , an increase in aggrecan messenger RNA levels and proteoglycan synthesis in chondrocyte cultures , and modulation of transforming growth factor formation and adenylate cyclase production in osteoblasts . In addition, an increase in insulin-like growth factor in bone marrow-derived stromal cells  and an increase in prostaglandin E2 production in osteoblasts have been observed . Recently, LIPUS was used for treatment of Charcot joint and leg lengthening [19–21]. In Alagille syndrome, deficiency of intestinal bile acids ultimately interferes with the absorption of vitamin D, and failure of endochondral ossification is generally associated with the disturbance of absorption of vitamin D. However, the underlying mechanism causing delayed union in Alagille syndrome remains unclear. Therefore, we consider that LIPUS might promote enhancement of endochondral ossification in femoral shaft fracture healing in Alagille syndrome. The good clinical healing in the present case indicates that these mechanisms are induced by LIPUS, and that its effects are sufficient for healing of fractures associated with this condition.
To the best of our knowledge, no studies have reported use of the Ilizarov frame and LIPUS in diaphyseal femoral fractures in Alagille syndrome. The rationale for this technique is immediate weight-bearing, good knee and ankle motion, and a high rate of a successful union. Furthermore, the reported average time that fixators are removed is approximately 55 (range, 38–79) days . Following the original principles of the Ilizarov technique, the closed indirect reduction technique was used under image guidance, first using ligamentotaxis to compress the fracture ends . Obtaining perfect reduction and absolute compression of the fracture ends were not difficult. Fracture healing occurred by secondary intention and callus formation. We did not experience wire cut through, especially in the presence of pin-tract infection. The early union in this case, despite having Alagille syndrome, might be attributed to the initial closed reduction. Early ambulation and immediate weight-bearing may improve limb circulation and enhance the healing process, based on the fact that the speed of fracture healing is usually proportional to the amount of available circulation to and between the fragments . One of the most important advantages of using this technique is the excellent recorded knee and ankle range of motion within a short time from frame removal. Active and passive movements of both joints were allowed and encouraged along the entire course of treatment immediately after application of the frame. Additionally, no physiotherapy sessions were needed to regain normal full activity. The main disadvantages of this procedure are that it is technically demanding, the need for imaging, its relatively high expense, depression may occur in some patients, and the absolute necessity of adequate care of the frame. From our point of view, immediate weight-bearing and the fact that the patient could go back to school were adequate justification for this procedure. Furthermore, a reduction in hospital stay and time needed for physiotherapy are also important considerations.
This case report provides satisfactory evidence that LIPUS and an Ilizarov ring fixator are successful for managing diaphyseal fractures in Alagille syndrome. Some reports have described that although internal fixation is better tolerated by patients with lower morbidity and better (although delayed) mobility, it is associated with some complications, such as delayed weight-bearing, implant failure, need for further surgery, and less mobility in the knee and ankle. Although technically demanding, the procedure reported here is a reliable and efficient method of treating simple femoral shaft fractures in Alagille syndrome because it resulted in adequate healing time, immediate ambulation and weight-bearing, excellent ankle and knee motion, and no complications. Based on the final clinical and radiographic outcomes, this technique proved to be adequate for managing a simple diaphyseal femoral fracture in Alagille syndrome. LIPUS treatment is an effective, non-invasive adjuvant method to enhance callus maturation in fracture healing. Using this treatment, the healing time and duration of external fixation can be reliably shortened.
Written informed consent was obtained from the patient for publication of this Case Report and any accompanying images. A copy of the written consent is available for review by the Editor of this journal.
- Zanotti S, Canalis E: Notch regulation of bone development and remodeling and related skeletal disorders. Calcif Tissue Int. 2012, 90 (2): 69-75.View ArticlePubMedGoogle Scholar
- Heritage ML, MacMillan JC, Anderson GJ: DHPLC mutation analysis of Jagged1 (JAG1) reveals six novel mutations in Australian alagille syndrome patients. Hum Mutat. 2002, 20 (6): 481-View ArticlePubMedGoogle Scholar
- Kamath BM, Bauer RC, Loomes KM, Chao G, Gerfen J, Hutchinson A, Hardikar W, Hirschfield G, Jara P, Krantz ID, Lapunzina P, Leonard L, Ling S, Ng VL, Hoang PL, Piccoli DA, Spinner NB: NOTCH2 mutations in Alagille syndrome. J Med Genet. 2012, 49 (2): 138-144.View ArticlePubMedGoogle Scholar
- Bales CB, Kamath BM, Munoz PS, Nguyen A, Piccoli DA, Spinner NB, Horn D, Shults J, Leonard MB, Grimberg A, Loomes KM: Pathologic lower extremity fractures in children with Alagille syndrome. J Pediatr Gastroenterol Nutr. 2010, 51 (1): 66-70.View ArticlePubMedPubMed CentralGoogle Scholar
- Emerick KM, Rand EB, Goldmuntz E, Krantz ID, Spinner NB, Piccoli DA: Features of Alagille syndrome in 92 patients: frequency and relation to prognosis. Hepatology. 1999, 29 (3): 822-829.View ArticlePubMedGoogle Scholar
- Hoffenberg EJ, Narkewicz MR, Sondheimer JM, Smith DJ, Silverman A, Sokol RJ: Outcome of syndromic paucity of interlobular bile ducts (Alagille syndrome) with onset of cholestasis in infancy. J Pediatr. 1995, 127 (2): 220-224.View ArticlePubMedGoogle Scholar
- de Halleux J, Rombouts JJ, Otte JB: Evolution of post-fracture bone deformities in an infant with hepatic osteodystrophy on Alagille syndrome. Rev Chir Orthop Reparatrice Appar Mot. 1998, 84 (4): 381-386.PubMedGoogle Scholar
- Nakamura T, Kusuzaki K, Matsubara T, Satonaka H, Shintani K, Wakabayashi T, Matsumine A, Uchida A: Histiocytic osteolysis secondary to hyperbilirubinaemia: a case report. J Orthop Surg (Hong Kong). 2008, 16 (2): 263-266.Google Scholar
- Lin L, Chang MH, Tsai WY, Tsai KS, Li YW: Bone fractures in children with chronic cholestasis. Zhonghua Min Guo Xiao Er Ke Yi Xue Hui Za Zhi. 1997, 38 (5): 360-364.PubMedGoogle Scholar
- Al-Habdan I: Diaphyseal femoral fractures in children: should we change the present mode of treatment?. Int Surg. 2004, 89 (4): 236-239.PubMedGoogle Scholar
- Mirdad T: Operative treatment of femoral shaft fractures in children: a nine-year experience in a Saudi Arabian population. Injury. 2000, 31 (10): 769-771.View ArticlePubMedGoogle Scholar
- Wani MM, Dar RA, Latoo IA, Malik T, Sultan A, Halwai MA: External fixation of pediatric femoral shaft fractures: a consecutive study based on 45 fractures. J Pediatr Orthop B. 2013, 22 (6): 563-570.View ArticlePubMedGoogle Scholar
- Kapukaya A, Subaşi M, Necmioğlu S, Arslan H, Kesemenli C, Yildirim K: Treatment of closed femoral diaphyseal fractures with external fixators in children. Arch Orthop Trauma Surg. 1998, 117 (6–7): 387-389.View ArticlePubMedGoogle Scholar
- Wang SJ, Lewallen DG, Bolander ME, Chao EY, Ilstrup DM, Greenleaf JF: Low intensity ultrasound treatment increases strength in a rat femoral fracture model. J Orthop Res. 1994, 12 (1): 40-47.View ArticlePubMedGoogle Scholar
- Parvizi J, Wu CC, Lewallen DG, Greenleaf JF, Bolander ME: Low-intensity ultrasound stimulates proteoglycan synthesis in rat chondrocytes by increasing aggrecan gene expression. J Orthop Res. 1999, 17 (4): 488-494.View ArticlePubMedGoogle Scholar
- Ryaby JT, Mathew J, Pilla AA: Low-intensity pulsed ultrasound modulates adenylate cyclase activity and transforming growth factor beta synthesis. Electromagnetics in medicine and biology. Edited by: Brighton CT, Pollack SR. 1991, San Francisco, CA: San Francisco Press, 95-100.Google Scholar
- Naruse K, Mikuni-Takagaki Y, Azuma Y, Ito M, Oota T, Kameyama K, Itoman M: Anabolic response of mouse bone-marrow-derived stromal cell clone ST2 cells to low-intensity pulsed ultrasound. Biochem Biophys Res Commun. 2000, 268 (1): 216-220.View ArticlePubMedGoogle Scholar
- Kokubu T, Matsui N, Fujioka H, Tsunoda M, Mizuno K: Low intensity pulsed ultrasound exposure increases prostaglandin E2 production via the induction of cyclooxygenase-2 mRNA in mouse osteoblasts. Biochem Biophys Res Commun. 1999, 256 (2): 284-287.View ArticlePubMedGoogle Scholar
- Gebauer D, Correll J: Pulsed low-intensity ultrasound: a new salvage procedure for delayed unions and nonunions after leg lengthening in children. J Pediatr Orthop. 2005, 25 (6): 750-754.View ArticlePubMedGoogle Scholar
- Sato W, Matsushita T, Nakamura K: Acceleration of increase in bone mineral content by low-intensity ultrasound energy in leg lengthening. J Ultrasound Med. 1999, 18 (10): 699-702.PubMedGoogle Scholar
- Strauss E, Gonya G: Adjunct low intensity ultrasound in Charcot neuroarthropathy. Clin Orthop. 1998, 349: 132-138.View ArticlePubMedGoogle Scholar
- Kumar A, Whittle AP: Treatment of complex (Schatzker Type VI) fractures of the tibial plateau with circular wire external fixation: retrospective case review. J Orthop Trauma. 2000, 14 (5): 339-344.View ArticlePubMedGoogle Scholar
- El-Sayed M, Atef A: Management of simple (types A and B) closed tibial shaft fractures using percutaneous lag-screw fixation and Ilizarov external fixation in adults. Int Orthop. 2012, 36 (10): 2133-2138.View ArticlePubMedPubMed CentralGoogle Scholar
- The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2474/15/225/prepub
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.