A feasibility study of magnetic resonance pelvimetry in women of short stature to identify the risk of cephalo-pelvic disproportion.

OBJECTIVE: To conduct a feasibility study to assess if MR Pelvimetry can be undertaken in short stature primigravidae, with a view to a main study to answer the question 'can MR pelvimetry be used to predict cephalo-pelvic disproportion (CPD) in women of short stature?'. STUDY DESIGN: This was a prospective single arm feasibility study. In the first phase, patient and public involvement was undertaken to assess acceptability of the study. In the second phase, primiparous women of ≤ 160 cm in height were selected from antenatal clinics. Obstetricians and midwives were asked to inform all eligible women about the study. Patients were approached in the third trimester and written information about the study provided. If the patient agreed to participate, they were invited for consent. MR scans were performed from 36 weeks gestation. Patients and their obstetricians were not informed of the results of the MR until after delivery (in view of NICE and WHO recommendations on pelvimetry). RESULTS: MR scans were performed on 21/35 (60%) participants who consented. The study was conducted without adverse events and was acceptable to all participants. Data were available from 19 patients; 7 (37%) of whom had caesarean section (CS) due to CPD, 7 (37%) had assisted vaginal birth (AVB), while 5 (26%) had spontaneous vaginal births (SVD). Two patients who had an elective CS were not included in the analysis. The pelvic measurements especially anatomical conjugate (inlet), transverse diameter (mid cavity) and anteroposterior diameter at the outlet were larger in the SVD group in comparison to in-labour CS /AVB. Interobserver MR scan measurements were comparable between radiologists: intraclass correlation coefficient (ICC) range 0.68 to 0.95. CONCLUSION: This feasibility study suggests that conducting a full study to answer the research question 'can MR pelvimetry predict CPD in women of short stature?'would be feasible and acceptable to patients. The recruitment, MR scan protocol, reporting, reliability of measures were all assessed and found acceptable for a trial. A trend was observed for smaller pelvic measurements in women who needed intervention compared with those who had a natural birth/SVD. With evidence from a full trial, this could have major implications for the management of short stature women, in terms of clinical practice and safety. KEY MESSAGES: A large trial would be feasible and acceptable to assess whether MR pelvimetry can predict CPD in women of short stature. Despite the small number of patients, a trend was observed for smaller pelvic measurements in women who needed intervention compared to those who had spontaneous vaginal birth. Evidence from a large trial could help inform clinical practice, and provide information and choice for women at risk of CPD.

The impact of myosteatosis on outcomes following surgery for gastrointestinal malignancy: a meta-analysis.

INTRODUCTION: The aim of this review was to evaluate the impact of preoperative myosteatosis on long-term outcomes following surgery for gastrointestinal malignancy. METHODS: We conducted a systematic search of the electronic information sources, including PubMed MEDLINE, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), CINAHL and AMED. Studies were included if they reported the impact of preoperatively defined myosteatosis, or a similar term, on long-term survival outcomes following surgery for gastrointestinal malignancy. A subgroup analysis was performed for those studies reporting outcomes for colorectal cancer patients only. FINDINGS: Thirty-nine full-text articles were reviewed for inclusion, with 19 being retained after the inclusion criteria were applied. The total number of included patients across all studies was 14,481. Patients with myosteatosis had significantly poorer overall survival, according to univariate (hazard ratio (HR) 1.82, 95% confidence interval (CI) 1.67-1.99) and multivariable (HR 1.66, 95% CI 1.49-1.86) analysis. This was also demonstrated for cancer-specific survival (univariate HR 1.62, 95% CI 1.18-2.22; multivariable HR 1.73, 95% CI 1.48-2.03) and recurrence-free survival (univariate HR 1.28, 95% CI 1.10-1.48; multivariable HR 1.38, 95% CI 1.07-1.77). CONCLUSIONS: This meta-analysis demonstrates that patients with preoperative myosteatosis have poorer long-term survival outcomes following surgery for gastrointestinal malignancy. Therefore, myosteatosis should be used for preoperative optimisation and as a prognostic tool before surgery. More standardised definitions of myosteatosis and further cohort studies of patients with non-colorectal malignancies are required.

Measuring public knowledge, attitudes, and behaviors related to radon to inform cancer control activities and practices.

Radon exposure is the second leading risk factor for lung cancer among smokers and the leading risk factor among non-smokers. Radon concentrated in lower levels of homes/buildings can be reduced if found, thus lowering lung cancer risk. The objective of this study was to measure radon knowledge in diverse populations, with varying radon-related laws, to inform radon-related cancer control practices and activities. A survey was mailed to 3000 homebuyers who purchased single-family homes; 995 responses (33%) were received. Overall, 86% of respondents heard of radon-related health issues. Real estate agents (69%) or home inspectors (65%) were the most common sources of information. Respondents were more likely to test their home for radon if they reported previously hearing of radon-related health issues or understanding of how radon-related health issues affect the home-buying process. Respondents in states with notification policies were twice as likely as those without policies to have heard about radon-related health issues (OR 2.01, 95% CI: 1.27-3.17). This study provides useful information for cancer control activities including that education is positively associated with home testing for radon. It also suggests partnering with real estate agents to further radon education and testing efforts to reduce radon exposure and lung cancer risk.

Dual engagement of 14-3-3 proteins controls signal relay from ASK2 to the ASK1 signalosome.

Faithful and efficient transmission of biological signals through mitogen-activated protein kinase (MAPK) pathways requires engagement of highly regulated cellular machinery in response to diverse environmental cues. Here, we report a novel mechanism controlling signal relay between two MAP3Ks, apoptosis signal-regulating kinase (ASK) 1 and ASK2. We show that ASK2 specifically interacts with 14-3-3 proteins through phosphorylated S964. Although a 14-3-3-binding defective mutant of ASK1 (S967A) has no effect on the ASK2/14-3-3 interaction, both overexpression of the analogous ASK2 (S964A) mutant and knockdown of ASK2 dramatically reduced the amount of ASK1 complexed with 14-3-3. These data suggest a dominant role of ASK2 in 14-3-3 control of ASK1 function. Indeed, ASK2 S964A-induced dissociation of 14-3-3 from ASK1 correlated with enhanced phosphorylation of ASK1 at T838 and increased c-Jun N-terminal kinase phosphorylation, the two biological readouts of ASK1 activation. Our results suggest a model in which upstream signals couple ASK2 S964 phosphorylation to the ASK1 signalosome through dual engagement of 14-3-3.

Efficacy and complications of Angioseal in antegrade puncture.

AIM: Although arterial closure devices are in use for over a decade, there have been no specific study to assess the use of the same in antegrade puncture. MATERIAL AND METHOD: Consecutive patients undergoing antegrade puncture for peripheral vascular disease in a single centre performed by a single operator were included in this study. The notes and the angiograms were reviewed retrospectively for possible complications and the severity of disease. RESULT: Over a 25-month period, 21 patients with antegrade puncture had Angioseal deployed for haemostasis. Post-procedure complications recorded from the case notes showed one episode of haematoma formation and one case of worsening ischaemia. The severity of the disease at the puncture site did not influence the outcome. CONCLUSION: Use of Angioseal is safe and effective in antegrade punctures for peripheral vascular disease. The result is independent of the severity of disease at the puncture site.

A comparison of a 'J' wire and a straight wire in successful antegrade cannulation of the superficial femoral artery.

AIMS: To evaluate the success of two different types of wire in common use in their ability to successfully cannulate the superficial femoral artery (SFA) using antegrade puncture. METHODS: 50 consecutive patients in whom antegrade infra-inguinal intervention was planned, underwent common femoral arterial puncture and then cannulation with either a standard 3mm 'J' wire or a floppy tipped straight wire (William Cook-Europe). The frequency with which each type of wire entered the SFA or profunda femoris artery without image guidance was recorded. Further analysis was also made of the success of manipulation of the wire into the SFA following profunda cannulation and the use of alternative guide wires. RESULTS: In 19 out of 25 (76%) patients the 'J' wire correctly entered the SFA without image guidance. Only 5 out of 25 (25%) of straight wires entered the SFA with the initial pass (p < 0.0001). Following further manipulation with the same wire all except 1 'J' wire was successfully negotiated into the SFA. The same was true for only 9 of the remaining straight wires with 11 patients requiring an alternative guide wire. CONCLUSIONS: When performing antegrade cannulation of the SFA a 'J' wire is more likely to be successful than a straight guide wire.

Acetabular stress fractures in military endurance athletes and recruits: incidence and MRI and scintigraphic findings.

OBJECTIVE: To evaluate the incidence and the MRI and scintigraphic appearance of acetabular stress (fatigue) fractures in military endurance athletes and recruits. DESIGN AND PATIENTS: One hundred and seventy-eight active duty military endurance trainees with a history of activity-related hip pain were evaluated by both MRI and bone scan over a 2-year period. Patients in the study ranged in age from 17 to 45 years. They had hip pain related to activity and had plain radiographs of the hip and pelvis that were interpreted as normal or equivocal. The study was originally designed to evaluate the MRI and scintigraphic appearance of femoral neck stress fractures. Patients had scintigraphy and a limited MRI examination (coronal imaging only) within 48 h of the bone scan. Twelve patients demonstrated imaging findings compatible with acetabular stress fractures. RESULTS: Stress fractures are common in endurance athletes and in military populations; however, stress fracture of the acetabulum is uncommon. Twelve of 178 patients (6.7%) in our study had imaging findings consistent with acetabular stress fractures. Two patterns were identified. Seven of the 12 (58%) patients had acetabular roof stress fractures. In this group, two cases of bilateral acetabular roof stress fractures were identified, one with a synchronous tensile sided femoral neck stress fracture. The remaining five of 12 (42%) patients had anterior column stress fractures, rarely occurring in isolation, and almost always occurring with inferior pubic ramus stress fracture (4 of 5, or 80%). One case of bilateral anterior column stress fractures was identified without additional sites of injury. CONCLUSIONS: Stress fractures are commonplace in military populations, especially endurance trainees. Acetabular stress fractures are rare and therefore unrecognized, but do occur and may be a cause for activity-related hip pain in a small percentage of military endurance athletes and recruits.

Frequency of coexistent disease at CT in patients with prostate carcinoma selected for definitive radiation therapy: is limited treatment-planning CT adequate?

PURPOSE: To document the frequency of clinically important coexistent disease depicted at contrast material-enhanced abdominal and pelvic computed tomography (CT) in patients undergoing definitive radiation therapy for prostate carcinoma, as such lesions might be missed at limited nonenhanced treatment-planning CT. MATERIALS AND METHODS: Of 133 consecutive patients with prostate carcinoma who were referred to the radiation oncology division between January 1, 1994, and December 31, 1996, 77 underwent definitive radiation therapy that required either contrast-enhanced abdominal and pelvic CT (n = 67) or contrast-enhanced pelvic CT (n = 10). Results of these studies were reviewed and retrospectively categorized. RESULTS: Forty-eight (62%) of the 77 patients had either negative studies or minor abnormalities that did not require further follow-up. Only two patients (3%) had major abnormalities that required intervention. Five patients (6%) had new findings of clinically important coexistent disease, but no intervention was required. CONCLUSION: The incidence of clinically important coexistent disease in patients with prostate carcinoma who are referred for definitive radiation therapy is low. Therefore, contrast-enhanced abdominal and pelvic CT in addition to treatment-planning CT is of limited value.

The ultrasonic description of postpubertal testicles in men who have undergone prepubertal orchiopexy for cryptorchidism.

PURPOSE: We provide a sonographic description of postpubertal testicles in patients who have undergone prepubertal orchiopexy with placement of a suture through the tunica albuginea. MATERIALS AND METHODS: Testicular ultrasound was performed in men who had undergone prepubertal testicular fixation for cryptorchidism using a suture passed through the tunica albuginea. Comparison was made to the sonographic appearance of cryptorchid testicles not secured with a fixating suture through the tunica albuginea. The operative report for each patient was reviewed with specific attention to use and type of suture material, and age at orchiopexy. RESULTS: Ultrasonography was performed on 22 men in whom a tunica albuginea fixating suture was placed during orchiopexy for cryptorchidism. Average patient age at orchiopexy was 5.6 years and median time from orchiopexy to this examination was 14.8 years. Right cryptorchidism existed in 64% of the men. No significant difference was noted in size between the 2 testicles in any patient. Ultrasonography did not identify any parenchymal abnormalities. A tunica albuginea calcification with posterior shadowing on the side of fixation was noted in 32% of patients, of whom 3 had calcified areas evident on physical examination. An area of subtunical hypoechogenicity was noted in 14% of patients. All tunical abnormalities were associated with the use of chromic suture. The remaining 12 patients (54%) had normal sonographic and physical examinations. The control group comprised 6 men who underwent orchiopexy without a fixating suture through the tunica albuginea. These men were examined identically and no sonographic abnormalities were noted in the tunica albuginea or testicular parenchyma. At a median of 16 months no patient had been diagnosed with testicular cancer or had a change in testicular self-examination. CONCLUSIONS: Tunica albuginea calcifications and hypoechogenic cysts are common ultrasonic findings in men who have undergone orchiopexy using a suture passed through the tunica albuginea. Parenchymal lesions should not be considered secondary to this procedure and must be treated as de novo abnormalities. These changes seem to be induced by the use of a fixating suture through the tunica albuginea.

Marrow MR signal abnormality associated with bilateral avulsive cortical irregularities in a gymnast.

Abnormal marrow signal and marrow enhancement have not been described in association with benign avulsive cortical irregularity. We present the case of an 11-year-old gymnast with such findings that partially resolved over time. The marrow MR abnormalities are believed to represent an extension or spectrum of findings associated with avulsive cortical irregularity, and should not instantly suggest infection or malignancy, as has been previously indicated. Careful and close clinical and radiological follow-up is required to confirm its benign course.

Resolution of abnormal MR signal intensity in patients with stress fractures of the femoral neck.

OBJECTIVE: The purpose of this study was to describe the natural evolution of abnormal MR signal intensity after the diagnosis of a stress fracture of the femoral neck and to ascertain the time to resolution of that abnormal signal intensity. SUBJECTS AND METHODS: Ten patients who had been previously diagnosed with stress fractures of the femoral neck after positive MR scans of the hip were examined with MR imaging at regular intervals. In each patient T1-weighted and short inversion time inversion recovery (STIR) sequences were obtained until the abnormally bright, diffuse MR signal intensity (representing edema) disappeared from the STIR images. Time to resolution was correlated with each patient's age and presence or absence of a fatigue line on MR imaging. Statistical analysis was done using Fisher's exact test. RESULTS: Edema resolved in seven patients within 3 months of initial diagnosis, in two patients within 6 months, and in the remaining patient within 12 months. We found no statistically significant correlation between time to resolution and patient age or the presence of a fatigue line on MR imaging. Residual sclerosis occurred in five patients, all of whom had a fatigue line. Two of these patients developed bright T1 signal (fatty marrow conversion) around the area of sclerosis. In the remaining three patients, STIR images revealed a brightened fatigue line, which we presumed was caused by granulation tissue. CONCLUSION: In this study, 90% of patients showed resolution of abnormal MR signal intensity on STIR imaging within 6 months of the initial diagnosis of stress fracture of the femoral neck. Such data may prove helpful in examining patients with recurrent symptoms who undergo repeated MR scanning. When an abnormally bright, diffuse MR signal intensity on STIR imaging is seen more than 6 months after an original injury, such abnormal signal intensity is likely to represent new injury.

Renal imaging with spiral CT scan: clinical applications.

Spiral computed tomography (CT) is an imaging modality that utilizes the rapid acquisition of cross-sectional data that can be reconstructed in a number of useful ways. We briefly describe the technology of spiral CT and recent advancements that have made spiral CT feasible. The advantages over conventional CT and angiography are reviewed. Urologic clinical applications are discussed including: detection of a crossing vessel prior to endopyelotomy for ureteropelvic junction (UPJ) obstruction, evaluating renal vascular anomalies preoperatively, and assistance in preoperative planning prior to partial nephrectomy in benign and malignant disease. Spiral CT has numerous advantages over conventional CT and angiography, and will likely have a notable role in future renal imaging.

Yield of imaging and scintigraphy assessing biochemical failure in prostate cancer patients.

A retrospective study was undertaken to determine the diagnostic yield of computed tomography (CT) and bone scan in patients with biochemical failure after definitive therapy for prostate cancer. The records of the Radiation Oncology Division were screened for patients presenting with prostate cancer between January 1, 1993, and December 31, 1996. Of 198 patients, 44 developed biochemical failure postoperatively (n = 24) or postradiotherapy (n = 20), and were not treated with hormones prior to restaging. Review was made of restaging studies performed at the time of biochemical failure. Postoperatively, 5% (1 of 20) of bone scans and 11% (2 of 18) of CT scans were positive. Postradiotherapy, 30% (6 of 20) of bone scans and 30% (3 of 10) of CT scans were positive. Our study showed that imaging studies are of low utility in the evaluation of patients with biochemical failure after definitive therapy of prostate cancer given that most patients begin hormonal therapy irrespective of the results of restaging studies. If salvage therapy is considered, imaging results may have a role in the decision-making process.

Sundown syndrome: etiology and management.

1. Although no clear definition of "sundowning" or "sundown syndrome" exists in the literature, most health care professionals affix either of these terms to the behavior observed in patients with dementia associated with increased agitation and confusion that occurs in the late afternoon. 2. Specific etiologic hypotheses that relate to sundowning behavior include disturbance in Rapid Eye Movement (REM) sleep, episodes of sleep apnea, and a deterioration of the suprachiasmatic nucleus of the hypothalamus. 3. Management of sundowning behavior includes the identification and treatment of any physiologic factors, low doses of specific neuroleptics, and nonpharmacological interventions such as restriction of daytime sleep, exposure to bright lights during the day, and mild activity schedules.

Promoting an awareness of retractions: the Louisiana State University Medical Center in Shreveport experience.

The current mission statement of the Medical Library Association states that it is "dedicated to improving health through professional excellence and leadership of its members in the ... provision of information services and educational programs ..." With this goal in mind, retractions offer medical librarians a professional challenge to become involved in the scientific process. Through results of a survey conducted among the consortium of South Central Academic Medical Libraries (SCAMeL), this paper reveals opinions on the importance of retraction awareness and who is responsible for disseminating this knowledge. The paper also reports what the Louisiana State University Medical Center at Shreveport Library and other SCAMeL member libraries are doing to promote awareness.