MRI Guided Adaptive Radiotherapy (MRgART) in Primary and Metastatic Liver Lesions

PURPOSE/OBJECTIVE(S)

The role of stereotactic body radiotherapy (SBRT) in the management of primary hepatic and metastatic tumors has increased significantly over the past few years. MR-Linac is rapidly gaining evidence in the delivery of ablative doses using MR guided adaptive radiotherapy (MRgART) with improved accuracy and dose coverage to the lesions. We report local control and toxicity of patients with primary and metastatic liver lesions treated with MR guided adaptive SBRT.

MATERIALS/METHODS

All patients were treated with MRgART on the Unity 1.5T MR Linacs at two institutions and consented to the ADAPT-MRL study (1). A 4DCT and MRI with abdominal compression were obtained at simulation and the primary MRI sequence used for online treatment included a T2 3D navigated scan. A balanced turbo field echo (btFFE) 2D cine motion scan was also acquired at every fraction to determine movement of the tumor to aid in internal target volume margin. All plans were treated with SBRT prescribed to 3-5 alternate daily fractions. Acute toxicity was reported according to Common Terminology Criteria for Adverse Events version 5 (CTCAE) v.5. Patient demographics, prescribed dose fractionation, acute toxicity and clinical response at 6 months were analyzed. Clinical response to treatment was measured according to RECIST criteria 1.1.

RESULTS

Between February 2021 to January 2023 a total of 30 patients were treated with 149 fractions to the liver. Patients were majority male (70%) with a median age of 66 (range 36-83). 16 patients were treated for primary hepatocellular carcinoma (HCC) of the liver and 14 patients for metastatic liver lesions. The median prescribed dose was 48 Gy (range 30-50Gy) in median 5 fractions (range (3-5 fractions). All patients completed treatment with no interruptions. The mean time from 'patient setup' to 'beam-off' was 52.6 minutes (range 37-73 minutes). Data on acute toxicity at 3 month follow up was available for 28 patients. Of these patients 7/28 (25%) had grade 1 or 2 toxicity and no >/ = grade 3 toxicity was reported. Clinical response at 6 months was available for 18 patients and showed complete response in 44% (8/18), partial response in 22% (4/18), stable disease in 22% (4/18) and progressive disease in 11.1% (2/18).

CONCLUSION

Our experience on MRgART to the liver has shown good local control and minimal acute toxicity in the treatment of primary and metastatic liver lesions. We continue to collect data on patient reported outcomes, clinical response and toxicity to determine the feasibility and safety of this system.

Biological basis of child health 15: understanding the renal system and common renal conditions in children

This article, the 15th and last in a series on the biological basis of child health, focuses on the renal system, in particular the kidneys. It provides an overview of their role, function, anatomy and physiology, and embryological development. The renal system has a crucial role in homeostasis, so renal function impairment can have wide-ranging and potentially serious consequences for a child's overall health. The article describes some of the common renal conditions seen in children and how these are managed. It explains how to interpret the results of renal function tests and urine sampling conducted to assess renal function and to investigate acute and chronic disease.

Biological basis of child health 14: understanding the immune system, vaccines, allergy and disease

This article, the 14th in a series on the biological basis of child health, focuses on the immune system. It provides an overview of pathogens to which the human body is susceptible, some of the milestones in the embryological development of the immune system, and some of the mechanisms of innate and acquired immunity. The article explains the importance of immunisations and provides examples of immune system dysfunctions and autoimmune conditions that children may experience. It is essential that children's nurses have an understanding of how the immune system develops, how it is structured and how it functions, since such knowledge will be relevant in the care of a range of conditions where nurses need to explain infection, inflammation and immune processes to children and parents.

Biological basis of child health 10: function and formation of blood and common blood disorders in children

This article, the tenth in a series on the biological basis of child health, focuses on blood. Blood has a crucial role in the transport of substances such as respiratory gases, nutrients and antibodies, as well as in acid-base balance, fluid balance, blood clotting and the immune system. This article describes the composition, formation and function of blood, outlines normal blood count values and explains the effects of low blood cell counts in children. It also provides an overview of the blood disorders that are commonly seen in children, including anaemia, sickle cell disease, clotting disorders and blood cancers. It is essential for children's nurses to have knowledge and an understanding of blood, including its physiology and pathophysiology, to provide optimal care and support to children and young people and their families.

Biological basis of child health 6: development of the skeletal system and orthopaedic conditions

This article is the sixth in a series on the biological basis of child health. It provides an overview of the development of the skeletal system before and after birth, and outlines the potential congenital anomalies that may occur. The article explains the structure and function of the bones before describing the role of the joints, tendons and ligaments. It also outlines the presentation and management of some of the common orthopaedic conditions seen in infants and children, including fractures, osteogenesis imperfecta, scoliosis, juvenile idiopathic arthritis, developmental dysplasia of the hip and achondroplasia.

Biological basis of child health 5: development of the respiratory system and elements of respiratory assessment

This article is the fifth in a series on the biological basis of child health. It describes the development of the respiratory system, which starts relatively late in the embryo and continues after birth until the age of seven to eight years. It explains what the developing anatomy of the respiratory system in infants and children means in terms of the conditions that may occur and the precautions required when assessing them. The article provides an overview of the elements of respiratory assessment in infants and children and describes some respiratory conditions seen in these patient groups. It also discusses some of the changes in the care of children with respiratory conditions, which has increasingly moved from hospital into the community and become nurse-led, multidisciplinary and holistic.

Equipping children's nurses to de-escalate conflict and communicate challenging information

This article considers some of the challenging situations that children's nurses may encounter when there are tensions and disagreements between the family of the child or young person in their care and the wider professional team. The focus is on disagreements about what some might consider futile critical care. It aims to equip children's nurses with strategies for dealing with conflict and tensions, and support them to be proactive in identifying situations that might need de-escalation. The options available to support the healthcare team and therefore avoid litigation are explored, while avenues of support available to nursing staff are considered. Suggestions and examples of effective and skilful communication with families receiving challenging news are provided. The legal position designed to safeguard children's nurses is reviewed and practical strategies are offered to support nurses to protect themselves from physical violence if the situation escalates.

Biological basis of child health 4: an overview of the central nervous system and principles of neurological assessment

This article is the fourth in a series on the biological basis of child health. It explains the embryological development of the nervous system and describes some of the anatomical and physiological features of the central nervous system, which is comprised of the brain and spinal cord. It also outlines the principles of neurological assessment in infants and children, before detailing the presentation and management of three conditions that can affect the central nervous system in this patient population - seizures, meningitis and raised intracranial pressure.

Biological basis of child health 3: development of the cardiovascular system and congenital heart defects

This article is the third in a series on the biological basis of child health. It outlines how the cardiovascular system develops during gestation and how congenital heart defects (CHDs) may arise in the process. The article details the pathophysiology and treatment of some of the common CHDs, including patent ductus arteriosus, atrial septal defect, ventricular septal defect and transposition of the great arteries. It explains the possible causes of CHDs and explains how these defects are detected and diagnosed. The article also provides an overview of the initial management of acutely unwell infants and children who present with a CHD. The first two articles in the series looked at cells and genetics, and embryology.

Understanding fluid homoeostasis in infants and children: part 2

Part two of this article focuses on the care and management of infants and children who are seriously ill and who have lost so much fluid that they have entered a state of shock. The pathophysiology of shock is reviewed and the types and stages of shock are considered. The challenges of identifying shock are explored and the management of fluid resuscitation with colloids rather than crystalloids is analysed. An overview of the complex management of a young person in shock is provided using a case history format. The article offers the opportunity to extend readers' knowledge of some of the special tests that may be required to support the diagnosis of shock and provides an overview of the expected results.

A pilot intervention to reduce postpartum weight retention and central adiposity in first-time mothers: results from the mums OnLiNE (Online, Lifestyle, Nutrition & Exercise) study

BACKGROUND

Postpartum weight retention (PPWR) increases the risk for obesity and complications during subsequent pregnancies. Few interventions have been successful in limiting PPWR in mothers. The present study assessed the effectiveness of the mums OnLiNE (Online, Lifestyle, Nutrition & Exercise) intervention with respect to reducing PPWR and improving diet, physical activity and sedentary behaviour.

METHODS

A subsample of first-time mothers enrolled in the Extended Melbourne Infant Feeding Activity and Nutrition Trial (InFANT Extend) completed the nonrandomised mums OnLiNE intervention. Women in the intervention (I) group (n = 28) received access to an online calorie tracking program, smartphone app, three telephone counselling calls with a dietitian and written material. Women in two comparison groups (CI and C2) (n = 48; n = 43) were from the control (C1) and intervention (C2) arms of InFANT Extend and received no additional support. Weight and waist circumference were measured objectively. Written surveys assessed diet and physical activity. Sedentary behaviour was self-reported. Linear and logistic regression assessed changes in outcomes between groups from 9 to 18 months postpartum.

RESULTS

Mean PPWR decreased in the (I) group (-1.2 kg) and the C2 group (-1.2 kg), although the changes were not significant. Mean waist circumference for all groups exceeded recommendations at baseline but decreased to below recommendations for women in the (I) group (78.3 cm) and significantly for the (I) group (-6.4 cm) compared to C1 (-1.1 cm; P = 0.002) and C2 (-3.3 cm; P = 0.001). Changes in diet, physical activity or sedentary behaviour were not significant.

CONCLUSIONS

The online intervention reported in the present study shows promise with respect to reducing waist circumference in postpartum women. Further evidence of strategies that may improve weight and related behaviours in this target group is needed.

Klinefelter syndrome

Klinefelter syndrome, affecting males, is a collection of characteristics that occurs as a result of two or more X chromosomes. The syndrome was named after Harry Klinefelter, an American endocrinologist, and is common - occurring in all races. It is thought that one male in every 500 live births is affected and the incidence is rising. However, this may be due to increasing awareness, reflective of the sophistication of the methods to diagnose.

When parents no longer trust the professionals

Away from the media spotlight, nurses in neonatal and intensive care units across the UK continue to do their jobs. Difficult ethical cases in these units, such as the one at the centre of the High Court challenge by the parents of baby Charlie Gard (pictured), are more common than people might think.

Joubert syndrome

Named after the French doctor who first described this rare neurological condition, Joubert syndrome is characterised by developmental delay, hypotonia, ataxia and oculomotor apraxia.

Down's syndrome

Down's syndrome is one of the most common congenital anomalies, affecting 1:1000 infants in the UK. It occurs in people of all races, and males and females are equally affected. It was named after a British doctor who is credited as the first person to describe the condition.

Understanding the physiology of sleep and promoting effective routines with infants in hospital and at home

Sleep is a biological necessity. Infants are unique individuals and what can be regarded as normal for one infant and his or her family may be considered a problem for another. Genetics, lifestyles, roles and responsibilities all influence sleep. This article explores the physiology of infant sleep and reviews how sleep is influenced by culture, events such as a hospital admission and parenting styles. It considers how the children's nurse can help and support a family who may feel that they have infant sleep-related issues. A good sleep pattern is essential for a child to succeed at school, reach their full potential and maintain their health and well-being.

Ito syndrome

Children with Ito syndrome have the common feature of unusual pigmentation in a characteristic swirling pattern located around the trunk, and as line-like patterns down the legs and arms.

Haemolytic uraemic syndrome

Although haemolytic uraemic syndrome is rare, it is not uncommon. Here is an overview of the syndrome, with advice on signs and symptoms and how to care for children and young people.

Time to viral suppression is not related to achievement of SVR12 in HCV GT1-infected patients treated with ombitasvir/paritaprevir/ritonavir and dasabuvir with or without ribavirin

High rates of sustained virologic response at post-treatment week 12 (SVR12) were achieved in six phase 3 trials of ombitasvir (OBV, an NS5A inhibitor), paritaprevir (an NS3/4A protease inhibitor) co-dosed with ritonavir (PTV/r) + dasabuvir (DSV, an NS5B RNA polymerase inhibitor) (ie, 3D regimen) with or without ribavirin (RBV) in adults with chronic genotype (GT) 1 hepatitis C virus (HCV) infection. We assessed whether time to first HCV RNA value below the lower limit of quantification in patients with and without cirrhosis was associated with achievement of SVR12. Data were analysed from GT1-infected patients enrolled in six phase 3 studies of 3D ± RBV. Patients who experienced non-virologic failure were excluded from analysis. HCV RNA was determined using the Roche COBAS TaqMan RT-PCR assay (lower limit of quantification, LLOQ =25 IU/mL). SVR12 was analysed by week of first HCV RNA suppression, defined as HCV RNA <LLOQ. The analysis included a total of 2027 patients. Cumulative proportions of subjects with initial HCV RNA suppression <LLOQ at weeks 1, 2, 4 and 6 were 31%, 81%, 99% and 100%, respectively. SVR12 was achieved by 98%, 97%, 98% and 92% of patients with initial suppression at Weeks 1, 2, 4 and 6, respectively (P=.42, trend test). Across six phase 3 trials of 3D ± RBV, most patients achieved viral suppression by week 2. Time to viral suppression was not associated with subsequent achievement of SVR12, suggesting that on-treatment virologic monitoring may not be necessary with this regimen.

Guillain-Barré syndrome

Individuals with Guillain-Barré syndrome (GBS) have sudden-onset polyneuropathy. This is characterised by muscle weakness, which occurs because of damage to the peripheral nervous system.

Student life - Giving the best start in life

How many nurses on adult wards get to kick off a medicines round with a game of hide-and-seek in a play room?

Fanconi anaemia

Fanconi anaemia is a rare inherited genetic condition that can lead to aplastic anaemia and bone marrow failure. People with the condition have a predisposition to some cancers. The condition is named after Swiss paediatrician Guido Fanconi.

Edwards' syndrome

Edwards' syndrome is a serious genetic condition that affects fetal cellular functions, tissue development and organogenesis. Most infants with the syndrome are female, but there is no race predominance.

Cornelia de Lange syndrome

Cornelia de Lange syndrome is a congenital condition that can affect many of a child's systems. It was named after the Dutch paediatrician who first identified it.

Mandatory reporting of abuse

The government is seeking views on the mandatory reporting of child abuse and neglect ( tinyurl.com/zuhhqt2 ). It is important that nurses contribute as they could face sanctions if the failure to act on suspicions became a criminal offence. Theconsultation closes on 13 October.

Brittle bone disease

Brittle bone disease is also known as osteogenesis imperfecta, Vrolik syndrome and Lobstein syndrome. The condition is not gender specific and is present in all cultures. As the name of the disease suggests, the bones of people who have it are brittle and prone to fracture.

Achondroplasia

Achondroplasia, like all syndromes, is recognised by a collection of typical anomalies. It is a cause of short stature; the average adult height being about 4 feet.

It's time for a rethink

Recently, I heard about a child who was referred to specialist obesity services by the school nurse, despite being considered by the family to be fit, healthy, happy and a normal size.

Genetic variation among 82 pharmacogenes: The PGRNseq data from the eMERGE network

Genetic variation can affect drug response in multiple ways, although it remains unclear how rare genetic variants affect drug response. The electronic Medical Records and Genomics (eMERGE) Network, collaborating with the Pharmacogenomics Research Network, began eMERGE‐PGx, a targeted sequencing study to assess genetic variation in 82 pharmacogenes critical for implementation of “precision medicine.” The February 2015 eMERGE‐PGx data release includes sequence‐derived data from ∼5,000 clinical subjects. We present the variant frequency spectrum categorized by variant type, ancestry, and predicted function. We found 95.12% of genes have variants with a scaled Combined Annotation‐Dependent Depletion score above 20, and 96.19% of all samples had one or more Clinical Pharmacogenetics Implementation Consortium Level A actionable variants. These data highlight the distribution and scope of genetic variation in relevant pharmacogenes, identifying challenges associated with implementing clinical sequencing for drug treatment at a broader level, underscoring the importance for multifaceted research in the execution of precision medicine.

Consultation's sleight of hand seeks to sugar unpalatable bursaries pill

The Department of Health's consultation on student bursaries has begun and people are being encouraged to take part in it. However, this consultation is not a consultation - it is predictable spin where sleight of hand seeks to sugar an unpalatable pill.

We are keen to contribute

Consultation on the nursing associate (NA) role closes this month. We have been assured by Health Education England that the NA role will 'integrate the science and art of nursing through work-based collaborative experience to assimilate academic knowledge and practical learning'.