Biological profile of oestrogen receptor alpha positive (ERalpha+) primary breast cancers in the elderly and their response to primary endocrine therapy

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Background: Aromatase inhibitors (AIs) have been shown to be superior to tamoxifen in several settings. However, it is unclear whether this superiority extends to its use as primary endocrine therapy in elderly patients with early operable primary breast cancer. Biological characteristics of the tumours may aid in selecting the most suitable agent. Methods: Primary endocrine therapy with one of the AIs (anastrozole) in 64 women >70 years with ERα+ breast cancer was compared to that in 84 treated with tamoxifen during the same period. Their selection was entirely based on contraindications e.g. thromboembolic risks. Needle core biopsies were assessed, by immunohistochemistry, for expression of biomarkers as described below. Results: There was no significant difference between the two groups (anastrozole vs tamoxifen) in terms of response at 6 months (clinical benefit (objective response + stable disease) rates = 97 vs 100%, p=0.099) or progression free survival (median = 16.5 vs 22.5 months, p=0.376). There were no withdrawals due to side effects from anastrozole, compared to four with tamoxifen. For all patients progesterone receptor (PgR), ERβ2, human epidermal growth factor receptor 2 (HER2), epidermal growth factor receptor (EGFR) and Ki-67 were over-expressed in 48%, 99%, 8%, 4% and 64% respectively. HER2 (18 vs 21 months, p=0.003) and Ki-67 (17.5 vs 23 months, p=0.042) over-expression were significantly associated with shorter progression free survival. Conclusions: These results thus far show that primary endocrine therapy with anastrozole in elderly patients with early operable ERα+ breast cancer is similar to tamoxifen in terms of efficacy, but may be better tolerated. In this population, ERα+ breast cancer also appears to have a less aggressive biological profile favouring better hormone sensitivity.

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Terahertz spectroscopy of plasmonic fractals

We use terahertz time-domain spectroscopy to study the transmission properties of metallic films perforated with aperture arrays having deterministic or stochastic fractal morphologies ("plasmonic fractals"), and compare them with random aperture arrays. All of the measured plasmonic fractals show transmission resonances and antiresonances at frequencies that correspond to prominent features in their structure factors in k space. However, in sharp contrast to periodic aperture arrays, the resonant transmission enhancement decreases with increasing array size. This property is explained using a density-density correlation function, and is utilized for determining the underlying fractal dimensionality, D(<2). Furthermore, a sum rule for the transmission resonances and antiresonances in plasmonic fractals relative to the transmission of the corresponding random aperture arrays is obtained, and is shown to be universal.

Role of intraventricular sodium nitroprusside in vasospasm secondary to aneurysmal subarachnoid haemorrhage: a 5-year prospective study with review of the literature

OBJECTIVE

Cerebral vasospasm remains an important cause of permanent neurological injury and death following aneurysmal subarachnoid haemorrhage, despite the best current medical therapy. Sodium nitroprusside was recently suggested as a treatment option for cerebral ischaemia in patients with severe medically refractive vasospasm after subarachnoid haemorrhage.

METHODS

Twenty patients of aneurysmal SAH with severe vasospasm, corroborated on transcranial Doppler (TCD), were included in this prospective study. The neurological condition of all patients was classified as Hess and Hunt grade II or higher. The diagnosis of severe delayed cerebral vasospasm refractory to conventional treatment (HHH therapy and nimodipine) was established before treatment. Ten patients received intraventricular sodium nitroprusside (SNP), while the other 10 had either major systemic illness or did not consent, formed the control group of the study. SNP was instilled in escalating doses with a starting dose of 4 mg/mL and reversal of vasospasm was monitored on neurological examination along with TCD in a basic ICU setting without the need for neurophysiological or invasive monitoring.

RESULTS

All patients in the study group showed an improvement in TCD velocities post-SNP instillation. Adverse effects were vomiting and hypotension in the SNP group which responded to medical management. The overall neurological outcome was good or excellent in 7/10 patients in the SNP group. Comparison between the two groups revealed improvement in TCD velocities and GCS in the SNP group thus affecting the long-term prognosis.

CONCLUSION

Intraventricular sodium nitroprusside represents a promising method of treatment for established delayed cerebral vasospasm and cerebral ischaemia refractory to conventional treatment.

Symptoms with acid and nonacid reflux may be produced by different mechanisms

Twenty-four-hour multichannel intraluminal impedance and pH (MII-pH) esophageal monitoring detects both acid and nonacid gastroesophageal reflux episodes. The MII-pH catheter contains six impedance segments placed 3, 5, 7, 9, 15, and 17 cm above the lower esophageal sphincter (LES). A pH electrode at 5 cm above the LES identifies the type of reflux, i.e. acid or nonacid. Patients with acid and nonacid reflux exhibit typical and atypical symptoms often within 5 min following a reflux episode. The aim of this study is to compare the timing of symptoms after reflux episodes in patients with acid and nonacid reflux. Methods include a review of 70 MII-pH tracings (42 females, mean age 40, range 18-85 years) either on (50 points) or off (20 points) acid suppression therapy. Typical (heartburn, regurgitation) and atypical (cough) symptoms with acid or nonacid reflux episodes detected by impedance were analyzed. Symptoms were considered positive with acid reflux if there was a pH drop to <4, plus an MII detected a reflux episode and with nonacid reflux if pH remained >4 and MII detected a reflux episode. The timing of the symptom after each reflux episode was recorded. Symptom perception occurred significantly sooner after acid versus nonacid reflux (P < 0.05). Acid reflux episodes are more likely to be perceived in the first 2 min following the reflux episode. Patients with acid reflux are likely to perceive symptoms earlier, and symptoms with acid and nonacid reflux may be produced by different mechanisms.

Clinical trial: the effects of a fermented milk product containing Bifidobacterium lactis DN-173 010 on abdominal distension and gastrointestinal transit in irritable bowel syndrome with constipation

BACKGROUND

A sensation of abdominal swelling (bloating) and actual increase in girth (distension) are troublesome features of irritable bowel syndrome (IBS), which is more common in patients with constipation, especially those with delayed transit.

AIM

To establish whether a fermented dairy product containing Bifidobacterium lactis DN-173 010 reduces distension in association with acceleration of gastrointestinal transit and improvement of symptoms in IBS with constipation.

METHODS

A single centre, randomized, double-blind, controlled, parallel group study in which patients consumed the test product or control product for 4 weeks. Distension, orocaecal and colonic transit and IBS symptoms were assessed on an intention-to-treat population of 34 patients.

RESULTS

Compared with control product, the test product resulted in a significant reduction in the percentage change in maximal distension [median difference - 39%, 95% CI (-78, -5); P = 0.02] and a trend towards reduced mean distension during the day [-1.52 cm (-3.33, 0.39); P = 0.096]. An acceleration of orocaecal [-1.2 h (-2.3,0); P = 0.049] as well as colonic [-12.2 h (-22.8, -1.6); P = 0.026] transit was observed and overall symptom severity [-0.5 (-1.0, -0.05); P = 0.032] also improved.

CONCLUSIONS

This probiotic resulted in improvements in objectively measured abdominal girth and gastrointestinal transit, as well as reduced symptomatology. These data support the concept that accelerating transit is a useful strategy for treating distension.

Cervical spine clearance: a review and understanding of the concepts

Cervical spine injury is relatively rare, occurring in only 2% to 3% of patients with blunt trauma who undergo imaging studies. However, timely and accurate recognition of cervical spine injury is essential for the optimal management of patients with blunt trauma as subsequent morbidity includes prolonged immobilization. Evaluation of cervical spine injuries should begin in the emergency department and involves a combination of pediatric, trauma, orthopedic, and neurosurgeons for definitive management. Knowing which patients are at highest risk for injuries will undoubtedly influence decisions on how aggressively to pursue a potential cervical spine injury and can be achieved by establishing a multidisciplinary team approach that provides cervical spine immobilization, assessment, and clearance. Implementation of such guidelines will decrease time for cervical spine clearance and incidence of missed injuries. In this article different aspects of cervical spine injuries and cervical spine clearance protocols are reviewed.

Unusual mode of firearm injury from the recoiled rear end of a gun barrel

Atypical gunshot wounds are caused by a diverse set of parameters relating to weapons and ammunition. We report a previously-unreported and atypical mode of gunshot wound produced by a detached rear end of the barrel of a gun following accidental gun fire, and discuss the difficulties in the management. A 36-year-old man presented to the emergency department with an alleged history of injury on the forehead with the rear end of a gun barrel following accidental gunfire while cleaning the nozzle. Since the time of injury, the patient was in an altered sensorium and had weakness on the right side of the body. There was minimal but continuous bleeding from the wound, with extrusion of brain matter. Skull radiograph showed that the rear end of the barrel had entered the left frontal bone, with associated depressed fracture of the frontal bone. The patient underwent a bicoronal, bifrontal craniotomy with a T-shaped extension towards the barrel to facilitate the reflection of the scalp flap and to avoid any movement of the barrel as it might further injure the brain. Necrotic brain, dura and bone pieces were removed. The patient was doing well at follow-up except for mild residual motor deficits. This case illustrates that while working with limited facilities, particularly in underdeveloped countries, a careful clinical assessment, interpretation of available images and a judicious operative approach can help to save the patient.

Anterior communicating artery aneurysms: an overview

AComA aneurysms are most commonly found at the A1-A2 junction on the dominant side. The angle of the arteries at the bifurcation and the direction of blood flow are factors of hemodynamic stress in the apical region where these aneurysms often develop. They exist at the bifurcation of dominant A1, A2 and AComA and usually point in the direction away from the dominant A1. They are more prone to rupture and demonstrate the highest incidence of post-operative morbidity among anterior circulation aneurysms. Consideration of aneurysm morphology may be used to guide approaches in AComA aneurysms. Resection of the gyrus rectus in combination with a pterional approach was popularized by Yasargil and it became the standard for treatment or exposure of AComA aneurysms, although other skull base approaches are also widely used. Clip selection is of extreme importance and the preservation of blood flow to the perforators should be emphasized. Adequate dissection and exposure of the entire "H" complex prior to clipping is the key to a successful outcome. Separating the perforators from the neck or dome of the artery and preserving the parent vessel presents a substantial challenge to the surgeon when the aneurysm is behind the parent artery, making it difficult to achieve a good outcome.

Intracranial ricocheting of bullet from anterior clinoid process

Gunshot wounds to the head are usually mortal injuries. We present a unique case of intracranial ricocheting of bullet without neurological deficits. Patient was treated conservatively with antibiotics for one week and prophylactic anticonvulsants for six weeks. Patient is doing well at six months follow up. Repeat X-ray skull showed that bullet was lying in the occipital region. It is recommended that deep seated bullets should be left behind as any attempt to remove that bullet may increase the morbidity and mortality. However close follow up of these patients is very important as these patients may come back with brain abscess.

Intestinal obstruction in children due to Ascariasis: a tertiary health centre experience

BACKGROUND

Ascariasis is the infestation by the largest intestinal nematode of man, a common problem in the tropics attributed to poor hygienic and low socioeconomic conditions. The aim of this research is to analyse the presentation, diagnosis and management of bowel obstruction caused by Ascaris lumbricoides, with special emphasis on the role of conservative management.

MATERIALS AND METHODS

This is a single centre, two consultant based 5 year retrospective study of childhood intestinal obstruction due to worms. Diagnosis in the suspected patients was based on history of passage of worms per mouth or rectum and on x-ray and ultrasonography findings. Only the patients of intestinal obstruction with documented evidence of roundworm infestation were included in the study and were followed for one year.

RESULTS

One hundred and three children with intestinal obstruction due to Ascaris lumbricoides were treated in the past five years at our centre. Abdominal pain was the most common presentation seen in 96 children followed by vomiting in 77 children. 20 children had history of vomiting worms and another 43 had history of passing worms in stool. Abdominal tenderness was present in 50 children, 48 had abdominal distension of varying degree, 50 had abdominal mass due to worm bolus, and 16 had or developed abdominal guarding or rigidity. All the children were managed as for acute intestinal obstruction along with hypertonic saline enema. The aim of management was "to starve the worm and hydrate the patient". 87 patients (84.47%) responded favourably and were relieved of the obstruction by the conservative management, 16 children (15.53%) had abdominal guarding or rigidity and underwent emergency exploration.

CONCLUSION

Roundworm obstruction should be considered in the differential diagnoses of all cases of intestinal obstruction in children. Clinical history and examination along with X-ray and ultrasonography are very helpful for diagnosis of this surgical emergency. Most cases of intestinal obstruction due to Ascaris can be managed conservatively; however emergency surgery is needed in patients with abdominal guarding and rigidity.

Impedance detected abnormal bolus transit in patients with normal esophageal manometry. Sensitive indicator of esophageal functional abnormality?

When used in combination with manometry, multichannel intraluminal impedance better characterizes the established manometric abnormalities into those with and without associated transit defects. However, the significance of the finding of normal manometry and abnormal impedance is not known. The objective of this study is to evaluate the clinical relevance of abnormal impedance associated with normal manometry during esophageal function testing in patients with a variety of esophageal symptoms. All patients referred for esophageal function testing during a 27-month period underwent combined multichannel intraluminal impedance and esophageal manometry studies including 10 liquid and 10 viscous swallows in supine position. From 576 patients with normal esophageal body manometry we identified 158 patients (27%) with abnormal impedance. The primary symptom in these 158 patients was compared to that in 146 consecutive patients with normal manometry and normal impedance selected from the original 576 patients. Abnormal bolus transit was found with viscous, liquid and both type swallows in 60%, 19% and 21% of the patients respectively. Of patients with abnormal bolus transit, 23% presented with dysphagia compared to 10% of normal transit patients (p = 0.0035). In conclusion, abnormal impedance even in patients with normal manometry may be a sensitive indicator of esophageal functional abnormality as represented by the symptom of dysphagia in these patients. Abnormal transit was more frequently identified with viscous than liquid swallows. Prospective studies to further clarify impedance detected transit defects in patients with normal manometry and the role of viscous swallows in diagnostic testing are warranted.