The radiographic union scale in tibial (RUST) fractures: Reliability of the outcome measure at an independent centre.

OBJECTIVES: The radiographic union score for tibial (RUST) fractures was developed by Whelan et al to assess the healing of tibial fractures following intramedullary nailing. In the current study, the repeatability and reliability of the RUST score was evaluated in an independent centre (a) using the original description, (b) after further interpretation of the description of the score, and (c) with the immediate post-operative radiograph available for comparison. METHODS: A total of 15 radiographs of tibial shaft fractures treated by intramedullary nailing (IM) were scored by three observers using the RUST system. Following discussion on how the criteria of the RUST system should be implemented, 45 sets (i.e. AP and lateral) of radiographs of IM nailed tibial fractures were scored by five observers. Finally, these 45 sets of radiographs were rescored with the baseline post-operative radiograph available for comparison. RESULTS: The initial intraclass correlation (ICC) on the first 15 sets of radiographs was 0.67 (95% CI 0.63 to 0.71). However, the original description was being interpreted in different ways. After agreeing on the interpretation, the ICC on the second cohort improved to 0.75. The ICC improved even further to 0.79, when the baseline post-operative radiographs were available for comparison. CONCLUSION: This study demonstrates that the RUST scoring system is a reliable and repeatable outcome measure for assessing tibial fracture healing. Further improvement in the reliability of the scoring system can be obtained if the radiographs are compared with the baseline post-operative radiographs.Cite this article: Mr J.M. Leow. The radiographic union scale in tibial (RUST) fractures: Reliability of the outcome measure at an independent centre. Bone Joint Res 2016;5:116-121. DOI: 10.1302/2046-3758.54.2000628.

Occult pneumothorax in blunt trauma: is there a need for tube thoracostomy?

INTRODUCTION/BACKGROUND: Occult pneumothorax (OPTX) is defined as air within the pleural cavity that is undetectable on normal chest X-rays, but identifiable on computed tomography. Currently, consensus is divided between tube thoracostomy and conservative management for OPTX. METHODS: The aim of this retrospective study is to determine whether OPTX can be managed conservatively and whether any adverse events occur under conservative management. Data on all trauma patients from 1 Jan 2010 to 31 December 2012 were obtained from our hospital's trauma registry. All patients with occult pneumothorax who had chest X-ray (CXR) and any CT scan visualizing the thorax were included. The exclusion criteria included those with penetrating wounds; CXR showing pneumothorax, hemothorax, or hemopneumothorax; those with prophylactic chest tube insertion before CT; and those with no CT diagnosis of OPTX. The complications of these patients were analyzed to determine if tube thoracostomy is necessary for OPTX and whether not inserting it would alter the outcome significantly. RESULTS: A total of 1564 cases were reviewed and 83 patients were included. Of these 83 patients, 35 (42.2 %) had tube thoracostomy after OPTX detection and 48 (57.8 %) were observed initially. Patients who had tube thoracostomy had similar ISS compared to those without (median ISS 17 vs. 18.5, p = 0.436). Out of the 48 patients who did not have tube thoracostomy on detection of an OPTX, 4 (8.3 %) had complications. In the group of 35 patients who had tube thoracostomy on detection of an OPTX, 7 (20 %) had complications. Of the 83 patients, a total of 12 patients had IPPV, of which 7 (58.3 %) had tube thoracostomy and 5 (41.7 %) did not. Patients who had tube thoracostomy under our care have a statistically significant likelihood of experiencing any complication compared to those without tube thoracostomy (odds ratio 9.92. The median length of stay was also longer (13 days) in those who had tube thoracostomy compared to those without (5 days) (p value = 0.008). CONCLUSIONS: Our study suggests that patients with OPTX can be managed conservatively with close monitoring, but only in areas with ready access to emergency facilities should any adverse events occur.

Successful endovascular embolisation of a jejunal artery aneurysm.

Jejunal artery aneurysms are rare, with only six cases reported in the literature to date. Endovascular embolisation of the jejunal artery is rarely performed. Herein, we report the case of a 57-year-old man who successfully underwent endovascular embolisation for bleeding caecal diverticulosis, during which a 9-mm fusiform jejunal artery aneurysm was incidentally diagnosed. Subsequently, the jejunal aneurysm was successfully embolised using Vortex coils.

Association of PD-L1 expression on tumor-infiltrating mononuclear cells and overall survival in patients with urothelial carcinoma.

BACKGROUND: Programmed death-1 (PD-1) receptor/PD-1 ligand (PD-L1) pathway negatively regulates T-cell-mediated responses. The prognostic impact of PD-L1 expression needs to be defined in urothelial carcinoma (UC). PATIENTS AND METHODS: Formalin-fixed paraffin-embedded tumor samples from 160 patients with UC were retrieved. PD-L1 expression was evaluated by immunohistochemistry using a mouse monoclonal anti-PD-L1 antibody (405.9A11). PD-L1 positivity on tumor cell membrane was defined as ≥5% of tumor cell membrane staining. The extent of tumor-infiltrating mononuclear cells (TIMCs) as well as PD-L1 expression on TIMCs was scored from 0 to 4. A score of 2, 3, or 4 was considered PD-L1-positive. Clinico-pathological variables were documented. The Cox regression model was used to assess the association of PD-L1 expression with overall survival (OS) in patients who developed metastases. RESULTS: TIMCs were present in 143 of the 160 patient samples. Out of 160 samples, 32 (20%) had positive PD-L1 expression in tumor cell membrane. Out of 143 samples with TIMCs, 58 (40%) had positive PD-L1 expression in TIMCs. Smoking history, prior BCG use and chromosome 9 loss did not correlate with PD-L1 expression in either tumor cell membrane or TIMCs. PD-L1 positivity was not different between non-invasive or invasive UC. In patients who developed metastases (M1) and were treated with systemic therapy (n = 100), PD-L1 positivity on tumor cell membrane was seen in 14% of patients and did not correlate with OS (P = 0.45). Out of 89 M1 patients who had evaluable PD-L1 on TIMCs, PD-L1 expression was seen in 33% of patients and was significantly associated with longer OS on multivariate analysis (P = 0.0007). CONCLUSION: PD-L1 is widely expressed in tumor cell membrane and TIMCs in UC. PD-L1 in tumor cells was not predictive of OS. However, positive PD-L1 expression in TIMCs was significantly associated with longer survival in those patients who developed metastases.

Reexamining treatment of high-grade T1 bladder cancer according to depth of lamina propria invasion: a prospective trial of 200 patients.

BACKGROUND: Management of high-grade T1 (HGT1) bladder cancer represents a major challenge. We studied a treatment strategy according to substaging by depth of lamina propria invasion. METHODS: In this prospective observational cohort study, patients received initial transurethral resection (TUR), mitomycin-C, and BCG. Subjects with shallower lamina propria invasion (HGT1a) were followed without further surgery, whereas subjects with HGT1b received a second TUR. Association of clinical and histological features with outcomes (primary: progression; secondary: recurrence and cancer-specific survival) was assessed using Cox regression. RESULTS: Median age was 71 years; 89.5% were males, with 89 (44.5%) cases T1a and 111 (55.5%) T1b. At median follow-up of 71 months, disease progression was observed in 31 (15.5%) and in univariate analysis, substaging, carcinoma in situ, tumour size, and tumour pattern predicted progression. On multivariate analysis only substaging, associated carcinoma in situ, and tumour size remained significant for progression. CONCLUSIONS: In HGT1 bladder cancer, the strategy of performing a second TUR only in T1b cases results in a global low progression rate of 15.5%. Tumours deeply invading the lamina propria (HGT1b) showed a three-fold increase in risk of progression. Substaging should be routinely evaluated, with HGT1b cases being thoroughly evaluated for cystectomy. Inclusion in the TNM system should also be carefully considered.

Non-operative management of obturator hernia in an elderly female.

Obturator hernia is a rare surgical condition, with about 800 cases being reported in the literature. It can cause significant morbidity and mortality, especially in the elderly age group. Delayed treatment is associated with high rates of strangulation (25-100 %). The mainstay of management for obturator hernia has been surgical. Non-operative management can lead to significant morbidity and mortality, but may be an option in patients who decline surgery, as described in our case.

Mass casualty incident training in a resource-limited environment.

BACKGROUND: A mass casualty incident (MCI) occurs when a disaster involves a large number of injured people, overwhelming the capacity of local emergency medical services. This article describes the planning and execution of a MCI workshop created for use in Sierra Leone, a low-income country. METHODS: Surgeons OverSeas (SOS), an international non-governmental organization, partnered with the Sierra Leone Office of National Security and Connaught Hospital to develop a 2-day MCI workshop designed to meet needs specific to their resource-limited environment. Pre- and post-course questionnaires were completed. Day 1 consisted of didactic teaching focused on triage principles, resource deployment, communication/operations and tabletop drills. On day 2 a mock MCI with performance assessments by independent observers was staged, followed by post-event debriefing. RESULTS: Pre-course questionnaires identified the following deficits: lack of triage training (29 per cent), and transportation (19 per cent) and communication (17 per cent) shortfalls. Only 11 per cent could define MCI. During the drill, on-scene and hospital triage was accurate in 28 (93 per cent) and 23 (77 per cent) of 30 casualties respectively. Systematic deficiencies identified included: transport issues, no accurate system for tracking victims, and undersized triage areas. Participants identified interagency coordination (63 of 136 responses; 46·3 per cent) and triage (32 of 136; 23·5 per cent) as the most valuable lessons learned. CONCLUSION: Pre-existing MCI programmes based on first-world logistics do not account for challenges encountered when caring for casualties in resource-constrained settings. Logistical training, rather than medical skills or knowledge, was identified as the educational priority.

Phylogenetic relationships of the Orang Asli and Iban of Malaysia based on maternal markers.

Malaysia remains as a crossroad of different cultures and peoples, and it has long been recognized that studying its population history can provide crucial insight into the prehistory of Southeast Asia as a whole. The earliest inhabitants were the Orang Asli in Peninsular Malaysia and the indigenous groups in Sabah and Sarawak. Although they were the earliest migrants in this region, these tribes are divided geographically by the South China Sea. We analyzed DNA sequences of 18 Orang Asli using mitochondrial DNA extracted from blood samples, each representing one sub-tribe, and from five Sarawakian Iban. Mitochondrial DNA was extracted from hair samples in order to examine relationships with the main ethnic groups in Malaysia. The D-loop region and cytochrome b genes were used as the candidate loci. Phylogenetic relationships were investigated using maximum parsimony and neighbor joining algorithms, and each tree was subjected to bootstrap analysis with 1000 replicates. Analyses of the HVS I region showed that the Iban are not a distinct group from the Orang Asli; they form a sub-clade within the Orang Asli. Based on the cytochrome b gene, the Iban clustered with the Orang Asli in the same clade. We found evidence for considerable gene flow between Orang Asli and Iban. We concluded that the Orang Asli, Iban and the main ethnic groups of Malaysia are probably derived from a common ancestor. This is in agreement with a single-route migration theory, but it does not dismiss a two-route migration theory.

Sudden, unexpected and unexplained early neonatal deaths in the North of England.

Early neonatal sudden unexpected unexplained deaths (for which we use the term ENSUD) have not been subject to detailed study. The authors investigated the incidence from 1983 to 2007 in the population of the North East of England and North Cumbria. The authors found 30 cases of unexplained ENSUD, giving an overall rate of 0.35/10 000 live births, with no significant change in incidence over this time, and they identified a further 19 deaths of abandoned babies. The authors conclude that unexplained ENSUD is even more rare than has been appreciated and its incidence has not been altered by the considerable changes in maternity care over the last 25 years.