תוצאת חיפוש

Aseptic Loosening of Joint Implants

Dror Fuchs, Chaim Zinman, Dina Lewinson

Orthopedic and Traumatology Dept. B, Rambam Medical Center; and Div. of Morphology Sciences, Bruce Rappaport Faculty of Medicine, The Technion, Haifa

The purpose of orthopedic joint implants is to improve joint movement. Within the past 30 years, biomechanical improvements affecting the life-span of the implants has brought a new type of problem: the biological response to debris from the implant material contributes greatly to aseptic loosening of the prosthesis. The process is mediated by osteotropic factors, cytokines released from mononuclear cells, and osteoblasts and osteoclasts in the bone-cement interface or bone-implant interface.

Intra-Osseous Ganglion of Scaphoid and Lunate Bones

M. Kligman, M. Roffman

Dept. of Surgery, Carmel Medical Center, Haifa

We present a patient with intra-osseous ganglion of the left scaphoid and lunate bone. These were excised and a bone graft inserted. 1 year after operation the patient was free of pain, without limitation of wrist motion. Intra-osseous ganglion of the carpal bone is not common and lunate and scaphoid intra-osseous ganglion has rarely been reported. Awareness of this condition may lead to earlier diagnosis and treatment, with satisfactory outcome.

Pelvic Lytic Lesion and Osteoporosis-Related Fractures

Yaron Weisel, Ehud Rath, Nissim Ohana, Dan Atar

Orthopedic Dept., Soroka Medical Center and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba

Insufficiency fractures of the pelvis may be overlooked as a cause of hip or groin pain. These fractures occur in the elderly, usually those with pronounced osteopenia of the pelvis. Predisposing factors include corticosteroids, local irradiation and postmenopausal osteoporosis. These fractures are difficult to detect clinically and plain radiographs and other studies may be misleading, delaying diagnosis and treatment. A 65-year-old woman had left groin and hip pain for 2 months with no history of trauma. Plain radiographs showed lytic lesions in the left pubic rami. Bone scan revealed increased uptake in that region, suggesting metastatic bone disease. Computed tomography and magnetic resonance imaging demonstrated fractures in the left superior and inferior pubic rami, with callus formation with no involvement of soft tissues. Quantitative computed tomography indicated low calcium concentration, below fracture threshold. The diagnosis of insufficiency fractures of the pelvis was confirmed by the favorable clinical and radiographic outcome. It is therefore important to be familiar with the appearance and location of these fractures.

Paroxysmal Nocturnal Hemoglobinuria

Haim Ben-Ami, Yehuda Edoute

Medical Dept. C, Rambam Medical Center and Bruce Rappaport Faculty of Medicine, The Technion, Haifa

Paroxysmal nocturnal hemoglobinuria (PNH) is a rare, acquired disorder of blood cells which originate from an abnormal hematopoietic stem cell. The condition is characterized by nocturnal hemoglobinuria, chronic hemolytic anemia, and thrombosis. We describe a 60-year-old woman with PNH admitted with abdominal pain and jaundice, who had dark urine on arising after a night's sleep. The diagnosis was established by the typical clinical story and a positive Ham test. She was successfully treated with Halotestin and folic acid. Although PNH is rare, it should be considered in the differential diagnosis of hemolytic anemia. Early diagnosis and treatment are important.

Closed Intramedullary Nailing of Forearm Fractures in Young Patients

Moshe Salai, Eyal Segal, Yehuda Amit, Aharon Chechick

Dept. of Orthopedic Surgery, Chaim Sheba Medical Center, Tel Hashomer

Forearm bone fractures are commonly the result of falling on the outstretched hand or of direct injury. The preferred treatment is debated. The possible modalities are: application of a cast, often necessitating repeated manipulations; open reposition and fixation by plates and screws; or closed manipulation and closed intramedullary nailing. We present our favorable results in treating these fractures in young patients by closed intramedullary nailing, and compare them with the unfavorable results of this method in mature adults.

Technetium 99-M Sestamibi Bone Scan in Musculo-Skeletal Neoplasms

Dror Robinson, Lena Pinkas, Lilia Mindlin, Nahum Halperin, Tifha Horn

Dept. of Orthopedics and Nuclear Medicine, Assaf Harofeh Medical Center, Zerifin

It is often difficult to assess accurately the nature of a skeletal lesion. Problems include differentiating a malignant from a benign bone tumor, as well as determining the cause of a pathologic fracture. Such fractures may occur through osteoporotic bone as well as through neoplasm-affected bone. Thus, development of an imaging modality capable of distinguishing between such lesions is of importance. During 1996, we ran a prospective study in which results of Tc-99m-methyl-diphosphate (MDP) bone scans were compared with those of sestamibi (MIBI) bone scans and with subsequent biopsy and clinical course. The results of the bone scans were assessed by 2 independent "blinded" observers, and the ratios of counts in lesions to those in normal tissue (L/N ratios) were calculated. In cases of malignant (7) and benign (8) tumors, intensity of uptake in MDP scans were not predictive of degree of aggressiveness. On the other hand, MIBI bone scans demonstrated significant difference in intensity of uptake between benign and malignant bone tumors (L/N ratios 2.05 vs 2.75). In 5 of 8 benign lesions the L/N ratio was 1. In the others, increased uptake was minimal. In 2 patients changes in uptake in MIBI bone scan following chemotherapy appeared to be related to the degree of tumor necrosis achieved. While the MIBI bone scan cannot replace tissue biopsy as a definitive diagnostic modality in bone neoplasms, it does appear to allow better preoperative assessment and prognosis.

Limited Axillary Thoracotomy for Recurrent Spontaneous Pneumothorax

I. Bar, M. Simha, A. Nissan, Y. Shargal, M. Kramer, G. Merin

Depts. of Cardiothoracic Surgery and of Surgery, and Pulmonary Institute, Hadassah--University Hospital, Ein Karem; and Dept. of Surgery, Hadassah--University Hospital, Mt. Scopus, Jerusalem

Recurrent spontaneous pneumothorax often requires surgical intervention. Recently, less invasive thoracic surgical techniques, such as video-assisted thoracoscopy (VAT) and limited axillary thoracotomy (LAT), have been developed and used for different thoracic procedures. We describe our results with limited axillary thoracotomy, as compared with those of video-assisted thoracoscopy as reported in the literature. From October 1994 to May 1996, 14 patients with recurrent spontaneous pneumothorax, aged 16-33 years, underwent limited axillary thoracotomy, resection of blebs and apical pleurectomy, using multifire GIA 80 staplers (Auto Suture Inc.). There were no complications or recurrences during 5-17 months of follow-up. Mean operative time was 52.2 minutes and mean hospital stay 2.3 days postoperatively. Full activity was regained within 12.1 days. In comparison with over 75 cases of VAT from the literature, LAT is safe and offers the potential benefits of decreased operative time, hospital stay and cost.

Suprascapular Nerve Entrapment in a Basketball Player

Atzmon Tsur, Radi Shahin

Rehabilitation Unit and Dept. of Neurology, Western Galilee Hospital, Nahariya

A basketball player was shown to have a suprascapular nerve lesion without any history of shoulder girdle trauma. This acute neuropathy, never previously described in basketball players, is a result of repeated micro-trauma, due to nerve traction over the coracoid notch during violent movement ("dunking" most probably). Clinically, he was unable to abduct his arm and had some difficulty in external rotation. He developed atrophy in both the supra- and the infraspinatus muscles. Nerve conduction latency to the supraspinatus muscle was 8.0 ms, and to the infraspinatus, 8.5 ms. The compound muscle action potential registered in the supraspinatus was 1.224 mV, and in the infraspinatus, 1.237 mV. After 3 weeks of inactivity, recovery was spontaneous and practically complete.

Surgical Repair of Fractures of the Clavicle

O. Safran, R. Mosheiff, Y. Mattan, M. Liebergall

Orthopedic Dept., Hadassah-University Hospital, Jerusalem

Clavicular fractures make up 45% of shoulder girdle fractures. The clavicle's susceptibility to injury is due to its subcutaneous position and its role as the bony connection between the thorax and the shoulder. In 95% of cases the mechanism of injury is a direct blow to the shoulder. These fractures are usually treated conservatively without surgery. But there are a few such fractures that require surgical repair in order to unite well. 9 patients were operated on for clavicular fractures during 1991-1995. The indications for surgical repair were lateral-third fracture, floating shoulder, neurovascular deficit or nonunion. The methods used were open reduction and fixation with either plate and screws, Kirchner wires, cerclage or a combination. All fractures united well, with no infections or new neurovascular deficits. Good range of shoulder motion and acceptable cosmetic results were achieved in all. 1 patient had functional limitation due to brachial neuritis caused by brachial damage at the time of injury. Indications for surgical repair and the methods used in these cases are similar to those described in the literature. The high rate of union and absence of complications support surgical repair for the few clavicular fractures that are not likely to unite properly.

Hyponatremia due to Prolonged Excessive Ingestion of Water

I. Shavit, J. Diment, S. Ravid, N. Shehadeh

Dept. of Pediatrics A, Rambam Medical Center and Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa

We report a 1.5-year-old boy admitted for restlessness and constipation. He was found to have hyponatremia caused by voluntary drinking of excessive amounts of water. Although unusual in children, intoxication by oral water is a recognized clinical syndrome in infants, 3-6 months old, fed with dilute formula. Water intoxication in older children is rare. The diagnosis was established by the water deprivation test.

Distraction Osteogenesis for Hypoplastic Facial Bones

Adi Rachmiel, Dina Lewinson, Dror Eizenbud, Daren Rosen, Dov Laufer

Dept. of Oral and Maxillofacial Surgery, and Orthodontics and Cleft Palate Unit, Rambam Medical Center; and Division of Morphological Sciences, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa

Distraction osteogenesis is a well-known method for bone lengthening which stretches callus to generate new bone in the distracted area. The method was developed by Ilizarov for the lengthening of long enchondral bones. In recent years the method has also been applied to the facial bones and to the jaw.

Magnetic Resonance Imaging for Suspected Femoral Neck Fractures

M. Kligman, M. Roffman

Dept. of Orthopedic Surgery, Carmel Medical Center, Haifa

Painful hip as a result of injury, with or without a history of trauma, is a common reason for referring elderly patients to the emergency room. The diagnosis of femoral neck fracture requires the combination of a physical examination, X-rays, and in problematic cases, a bone scan. However, even this combination does not always provide a diagnosis. We present 50 patients with painful hip who complained of limp and reduced hip joint motion, but had no evidence of fracture, either on X-ray or bone scan. After conservative treatment, 5 patients with no history of trauma underwent hemiarthroplasty of the hip for displaced subcapital fracture. In addition, we present a case of subcapital fracture which was diagnosed only by MRI, in whom both X-rays and bone scan were considered normal.

Recurrent Chronic Multifocal Bone Infection

Mordechai Kligman, Benny Bernfeld, Moshe Roffman

Dept. of Orthopedic Surgery, Carmel Medical Center, Haifa

We present a 9-year-old girl who had chronic recurrent multifocal osteomyelitis. The bones involved were: right clavicle, distal fibula (bilateral), left sacroiliac and right wrist. After 10 years of follow-up, she is asymptomatic but presents radiological evidence of lesions in the right clavicle and left sacroiliac joint. The diagnosis was made by exclusion criteria. The biopsy and results of cultures from various bones were negative 4 times. Although chronic recurrent multifocal osteomyelitis is rare, it should be considered in the differential diagnosis of acute or chronic osteomyelitis and neoplasms. Its recognition avoids unnecessary laboratory tests and antibiotic therapy.

Glenoid Fossa Fracture

M. Kligman, M. Roffman

Dept. of Orthopedic Surgery, Carmel Medical Center, Haifa

4 patients with displaced intra-articular glenoid fossa were treated either surgically or conservatively. After an average follow-up of 7 years, the clinical and radiographic results were satisfactory in all. The 2 treated surgically required shorter follow-up than those treated conservatively. Conservative treatment should be considered a good option for displaced intra-articular glenoid fossa fracture.

Biological Test for Menopausal Osteoporosis

Benjamin Klein, Nathan Rojansky

Depts. of Experimental Surgery and of Obstetrics and Gynecology, Hadassah- Hebrew University Medical Center, Ein Kerem, Jerusalem

Osteoporosis has become a major public health problem in many western countries in which about 25% of women by the age of 65 will have had osteopenic fractures. The most important contributing factor to this condition is loss of gonadal function. This progressive disease, characterized by reduction in bone mass, may be prevented by estrogen replacement therapy. While there are several methods of diagnosing the disease when already established, there is no method that can identify women at high risk of developing osteoporosis. We have developed a biological test in which the serum of postmenopausal women is added to rat osteoprogenitor cell culture and its influence on proliferation, differentiation and mineralization of bone cells is determined. The serum of 20 menopausal women was examined by the biological test and the results compared to the findings of dual photon absorptiometry. This showed that rapid bone-losers had a significantly lower mineralization index as compared to nonosteopenic women (p<0.0001). The proliferation index (cell count) and alkaline phosphatase activity did not show significant differences between osteopenic and nonosteopenic groups. This preliminary study showed that a test based on serum reacting with a culture of bone cells to induce mineralization may be of value in the diagnosis of osteoporosis.