Development of a solitary bone cyst – a report of a case suggesting its pathogenesis

The origin and natural course of solitary bone cysts (SBC) still remain controversial. Knowledge of the process of cyst formation and enlargement would be helpful for investigating its pathogenesis. Only two papers have described a radiodense nidus of the diaphysis as a precursor. Their cases were unique in that the initial lesions were in the diaphysis and that the cysts did not abut onto the epiphyseal line. This study reports a case in a patient with a tiny erosive lesion in the endosteal surface of the humeral metaphysis, which developed expansively into a typical large cyst over 6 years. Serial roentgenograms taken every year demonstrated the process of cyst enlargement. This is the first longitudinal study of a case with SBC documented from its onset. Received: 2 June 1998     

Phlebotomy: a treatment of ischaemic necrosis of the femoral head? Analysis of a hypothesis

The treatment of non-traumatic ischaemic osteonecrosis of the femoral head (ONFH) remains problematical and there is evidently scope to seek for a medical treatment of this disease which often leads to a surgical procedure for hip prosthesis. If we exclude the context of hemoglobin disorders, necrosis appears mainly in adults, when their limb bones contain a fatty marrow. Investigations such as intramedullary pressure measurement and transosseous phlebography suggest a disorder of the intraosseous blood circulation. Various studies in animals and man have provided arguments indicating that a kind of intraosseous 'obesity' due to hyperplasia and/or hypertrophy of the fatty tissue of the femoral marrow play a role in the development of necrosis. In this respect, the blood flow of the yellow marrow is close to ischemia, whereas red marrow flow can be very high. In various conditions, mainly hemolytic anemias, the femoral yellow marrow can convert to red marrow, which has also been described in anemias induced by blood loss. If it is not thought unreasonable to consider ONFH an 'ischemic' disease, these observations are an encouragement to attempt treatment by repeated phlebotomies. This procedure may locally restore red marrow, and then an adequate blood flow which could stabilize or even reverse the lesions if they are diagnosed early.     

A missing leaflet: a rare cause of structural deterioration of a bovine pericardial aortic bioprosthesis—report of a case

We experienced a rare cause of aortic bioprosthesis deterioration in which one of the leaflets disappeared 8.7 years after primary aortic valve replacement (AVR) in a male octogenarian. Successful redo AVR with a 23-mm Magna EASE (Carpentier-Edwards, Irvine, CA) was performed. No embolic complications occurred. We were unable to identify the cause of this devastating complication. When heart failure symptoms develop in patients with bioprostheses, clinicians should therefore consider a diagnosis of acute progression of structural valve deterioration and follow the patient carefully with echocardiography.     

Is a fracture of the transverse process of L5 a predictor of pelvic fracture instability?

In the management of a pelvic fracture prompt recognition of an unstable fracture pattern is important in reducing mortality and morbidity. It is believed that a fracture of the transverse process of L5 is a predictor of pelvic fracture instability. However, there is little evidence in the literature to support this view. The aim of this study was to determine whether a fracture of the transverse process of L5 is a reliable predictor of pelvic fracture instability. We reviewed our hospital trauma database and identified 80 patients who sustained a pelvic fracture between 2006 and 2010. There were 32 women and 48 men with a mean age of 40 years (10 to 96). Most patients were injured in a road traffic accident or as a result of a fall from a height. A total of 41 patients (51%) had associated injuries. The pelvic fractures were categorised according to the Burgess and Young classification. There were 45 stable and 35 unstable fractures. An associated fracture of the transverse process of L5 was present in 17 patients; 14 (40%) of whom had an unstable fracture pattern. The odds ratio for an unstable fracture of the pelvis in the presence of a fracture of the transverse process of L5 was 9.3 and the relative risk was 2.5. A fracture of the transverse process of L5 in the presence of a pelvic fracture is associated with an increased risk of instability of the pelvic fracture. Its presence should alert the attending staff to this possibility.     

Is there a role of a small dose of propofol in the treatment of laryngeal spasm?

BACKGROUND: Propofol has been found to depress the laryngeal reflexes. We studied whether this property could be utilized to relieve laryngeal spasm. METHODS: This study was conducted over a period of 3 years, and included children aged 3-10 years, ASA status I and II. Most of the children were undergoing minor surgical procedures, under general anaesthesia with Laryngeal Mask Airway (LMA trade mark ) and caudal epidural analgesia. RESULTS: During this period, 20 patients developed laryngeal spasm on removal of the LMA at the end of surgery. Initially, they all were treated with 100% O2, with gentle positive pressure ventilation. Out of 20 patients, seven responded well with 100% O2 and gentle positive pressure ventilation. The remaining 13 were treated with a small dose of propofol (0.8 mg.kg-1 body weight). Laryngeal spasm was relieved successfully in 10 patients and three patients required intubation to improve their oxygenation. CONCLUSIONS: Propofol in a small dose (0.8 mg.kg-1 body weight) was a useful drug to relieve laryngeal spasm in most children (76.9%) following the removal of the LMA. Because it was not found to be effective in all patients, succinylcholine still has a role to play in critical conditions. However, we recommend propofol as a suitable alternative for relieving laryngeal spasm in situations where succinylcholine is contraindicated.     

Perforation of Meckel’s Diverticulum by a Chicken Bone,a Rare Complication: Report of a Case

A perforation of Meckels diverticulum by foreign bodies is an extremely rare cause of acute abdomen in adults. We herein present a case of a 30-year-old man who was admitted due to symptoms of right lower quadrant pain, anorexia, and vomiting. An exploratory laparotomy was done, and a perforated Meckels diverticulum due to a chicken bone was found at exploration. A resection of a segment of ileum including the perforated diverticulum was performed, and the patient had an uncomplicated postoperative course.     

Infertility treatment, a matter of a lovely sperm？

Nowadays, the efficiency of the infertil-ity treatment is relatively low. One of the cues to counteract this problem relies on the optimum selection of spermatozoa. We developed a new method （sperm selection assay （SSA）） based on the chemical attrac-tion of spermatozoa that are at the best functional state. Additionally, the SSA leads spermatozoa to complete and/or acquire the competence to fertilize the egg. These effects are equally observed either in nor-mal or subfertile semen samples. Those cap-abilities of SSA may improve the success of current infertility treatment.     

The migration of a BioScrew® as a differential diagnosis of knee pain, locking after ACL reconstruction: a report of two cases

Introduction: Problems with the initial fixation strength and widening of the femoral and tibial canal after ACL reconstruction using a triple or quadruple semitendinosus autograft have led to the introduction of the so-called Hybrid fixation with the additional use of interference screws. Pain and intraarticular migration have been reported with metal interference screws requiring implant removal (Am J Knee Surg 11:32–34, 2000, Arthroscopy 11:289–291, 1995) but not yet with bioabsorbable screws. Materials and methods: We report on two cases were the intraarticular position of a bioabsorbable interference screw possibly due to migration in the early postoperative period lead to symptoms, the need for further surgery, and implant removal. Results: A preoperative MRI revealed the diagnosis. After removal of the tibial interference screw both knees were settling down, albeit with residual instability and only a moderate clinical result. Discussion: Despite the attractiveness of bioabsorbable screws due to the very fact that they are being reabsorbed over time, there is a slight risk of migration in the first month after the operation. In any suspicious case an MRI will easily clarify the diagnosis.This study was carried out at the Department of MRI, Klinik für Radiologische Diagnostik, Klinkum Saarbrücken, Winterberg 1, 66119 Saarbrücken     

Treatment of ruptured abdominal aortic aneurysm, a permanent challenge or a waste of resources? Prediction of outcome using a multi-organ-dysfunction score.

OBJECTIVES: in a retrospective study, attempts have been made to identify individual organ-dysfunction risk profiles influencing the outcome after surgery for ruptured abdominal aortic aneurysms. METHODS: out of 235 patients undergoing graft replacement for abdominal aortic aneurysms, 57 (53 men, four women, mean age 72 years [s.d. 8.8]) were treated for ruptured aneurysms in a 3-year period. Forty-eight preoperative, 13 intraoperative and 34 postoperative variables were evaluated statistically. A simple multi-organ dysfunction (MOD) score was adopted. RESULTS: the perioperative mortality was 32%. Three patients died intraoperatively, four within 48 h and 11 died later. A significant influence for pre-existing risk factors was identified only for cardiovascular diseases. Multiple linear-regression analysis indicated that a haemoglobin <90 g/l, systolic blood pressure <80 mmHg and ECG signs of ischaemia at admission were highly significant risk factors. The cause of death for patients, who died more than 48 h postoperatively, was mainly MOD. All patients with a MOD score >/=4 died (n=7). These patients required 27% of the intensive-care unit (ICU) days of all patients and 72% of the ICU days of the non-survivors. CONCLUSION: patients with ruptured aortic aneurysms from treatment should not be excluded. However, a physiological scoring system after 48 h appears justifiable in order to decide on the appropriateness of continual ICU support.     

An unusual tumor of rib diaphysis—report of a giant cell tumor and a brief review of literature

Giant Cell Tumor of bone (GCT) is a benign but aggressive tumor, which forms about 4?C5% of primary bone tumors and 1?C2% of all chest wall tumors. It arises in the epiphysis of bones. The epiphysis of a rib is in its head and tubercle posteriorly and hence a GCT arising in a rib??s anterior aspect, its diaphysis, is rare. In this unusual position, it can be mistaken for other more common diaphyseal pathologies. Radiological images are often diagnostic. A needle biopsy is best avoided and a wide excision biopsy is the treatment of choice. Microscopically, multinucleated giant cells are seen amidst stromal cells. Giant cells like these are also seen in other diseases like the brown tumor of primary hyperparathyroidism. Giant cell lesions are never caused by secondary hyperparathyroidism. We present a case of a diaphyseal GCT of rib in a patient with secondary hyperparathyroidism who was successfully treated.     

How do you stretch a bladder? A survey of UK practice,a literature review,and a recommendation of a standard approach

AIMS: To assess how and why hydrodistension of the bladder is performed by UK urologists and to compare this practise with the published literature on distension. To suggest a standardised technique for hydrodistension to allow comparison of diagnostic and therapeutic studies. METHODS: A questionnaire was sent to all UK consultant urologists. Questions addressed the indications for short bladder distension (SBD), details of technique, evaluation of outcome, and awareness of evidence base. The literature on bladder distension was reviewed. RESULTS: The majority of respondents perform SBD, principally in the diagnosis and therapy of interstitial cystitis (IC). There was considerable variation in the duration of distension, repetition of distension, the pressure used for distension, and the measurement of bladder capacity. The literature on the technique of hydrodistension is imprecise and no respondent was able to cite literature to support his or her practice. We suggest a simple, more objective technique for performing hydrodistension. CONCLUSIONS: SBD is widely used. There is marked variability in technique and little more than anecdotal evidence to support any particular approach. Research into the evaluation and treatment of painful bladder syndrome in general and IC in particular would be facilitated by the adoption of a standardised technique.     

First rib fractures： not always a hallmark of severe trauma a report of three cases

According to medical literature,fracture of the first rib is quite rare and the bilateral condition is especially rare.This type of fracture is usually associated with severe intrathoracic trauma and o...     

Endovascular Repair of a Left Axillary–Left Pulmonary Artery Fistula: Report of a Case

An abnormal communication between an artery of the systemic circulation and a pulmonary artery represents a rare clinical condition. A 76-year-old man presented with nocturnal dyspnea and retrosternal pain caused by a non-ST-elevation acute coronary syndrome. He had a history of a coronary artery bypass grafting operation 17 years previously, which required a repeat procedure 7 years later with a construction of an anastomosis of the left internal thoracic artery to the left anterior descending artery. Coronary angiography revealed an abnormal fistulous communication between the left axillary and the left pulmonary artery. Pressure measurements revealed pulmonary hypertension. An endovascular repair of the fistula was performed during repeat coronary angiography with an implantation of two self-expandable covered polytetrafluoroethylene stent grafts measuring 9 and 10 mm in diameter respectively, and thus resulting in a complete obstruction of the abnormal communication. During a follow-up period of 2 months the patient showed a significant improvement in his clinical condition.     

Is a Revision a Revision? An Analysis of National Arthroplasty Registries’ Definitions of Revision

Background

The reported survival of implants depends on the definition used for the endpoint, usually revision. When screening through registry reports from different countries, it appears that revision is defined quite differently.

Questions/purposes

The purposes of this study were to compare the definitions of revision among registry reports and to apply common clinical scenarios to these definitions.

Methods

We downloaded or requested reports of all available national joint registries. Of the 23 registries we identified, 13 had published reports that were available in English and were beyond the pilot phase. We searched these registries’ reports for the definitions of the endpoint, mostly revision. We then applied the following scenarios to the definition of revision and analyzed if those scenarios were regarded as a revision: (A) wound revision without any addition or removal of implant components (such as hematoma evacuation); (B) exchange of head and/or liner (like for infection); (C) isolated secondary patella resurfacing; and (D) secondary patella resurfacing with a routine liner exchange.

Results

All registries looked separately at the characteristic of primary implantation without a revision and 11 of 13 registers reported on the characteristics of revisions. Regarding the definition of revision, there were considerable differences across the reports. In 11 of 13 reports, the primary outcome was revision of the implant. In one registry the primary endpoint was “reintervention/revision” while another registry reported separately on “failure” and “reoperations”. In three registries, the definition of the outcome was not provided, however in one report a results list gave an indication for the definition of the outcome. Wound revision without any addition or removal of implant components (scenario A) was considered a revision in three of nine reports that provided a clear definition on this question, whereas two others did not provide enough information to allow this determination. Exchange of the head and/or liner (like for infection; scenario B) was considered a revision in 11 of 11; isolated secondary patella resurfacing (scenario C) in six of eight; and secondary patella resurfacing with routine liner exchange (scenario D) was considered a revision in nine of nine reports.

Conclusions

Revision, which is the most common main endpoint used by arthroplasty registries, is not universally defined. This implies that some reoperations that are considered a revision in one registry are not considered a revision in another registry. Therefore, comparisons of implant performance using data from different registries have to be performed with caution. We suggest that registries work to harmonize their definitions of revision to help facilitate comparisons of results across the world’s arthroplasty registries.