Understanding Duchenne Muscular Dystrophy: A Brief Overview

Duchenne muscular dystrophy (DMD) is a genetic disorder that affects approximately 1 in 3500 males. It is caused by the absence of the dystrophin gene, which leads to progressive muscle weakness and wasting.

Symptoms of DMD typically appear in early childhood and include delayed motor milestones, difficulty running, hypertrophy of calf muscles, and weakness in the lower extremities. One classic sign of DMD is a positive Gowers’ sign, where a child uses their upper extremities to help themselves stand up from the floor by first rising to stand on their arms and knees, then walking their hands up their legs to stand upright.

It is important to note that DMD is an X-linked recessive disorder, meaning that it primarily affects males. Females can be carriers of the gene mutation but are typically asymptomatic.

While there is currently no cure for DMD, there are treatments available to manage symptoms and improve quality of life. Early diagnosis and intervention are crucial for maximizing outcomes and improving long-term prognosis.

The egg ladder can be used to reintroduce egg in children with non-IgE mediated allergy, starting with baked egg in biscuits. Chlorpheniramine and adrenaline pen are not appropriate choices.

Identifying and Managing Food Allergies in Children and Young People

Food allergies in children and young people can be categorized into IgE-mediated and non-IgE-mediated allergies. It is important to note that food intolerance is not caused by immune system dysfunction and is not covered by the 2011 NICE guidelines. Symptoms of IgE-mediated allergies include skin reactions such as pruritus, erythema, urticaria, and angioedema, gastrointestinal symptoms like nausea, colicky abdominal pain, vomiting, and diarrhea, and respiratory symptoms such as nasal itching, sneezing, rhinorrhea, congestion, cough, chest tightness, wheezing, and shortness of breath. Non-IgE-mediated allergies may present with symptoms like gastro-oesophageal reflux disease, loose or frequent stools, blood and/or mucus in stools, abdominal pain, infantile colic, food refusal or aversion, constipation, perianal redness, pallor and tiredness, and faltering growth.

If the history suggests an IgE-mediated allergy, skin prick tests or blood tests for specific IgE antibodies to the suspected foods and likely co-allergens should be offered. On the other hand, if the history suggests a non-IgE-mediated allergy, the suspected allergen should be eliminated for 2-6 weeks and then reintroduced. It is recommended to consult a dietitian with appropriate competencies about nutritional adequacies, timings, and follow-up. By identifying and managing food allergies in children and young people, we can prevent severe allergic reactions and improve their quality of life.

A baby has been diagnosed with cow’s milk protein intolerance, which is a common condition affecting many infants within the first 3 months of life. The severity of the case is considered mild-moderate, as the baby’s size and weight are appropriate for their age. Primary care can manage this condition initially by switching to an extensive hydrolysed formula. An oral challenge is not recommended, as it is typically reserved for cases with significant diagnostic uncertainty or to determine if a food allergy has resolved. Referral to a paediatrician is not necessary at this stage. If the initial switch to an extensive hydrolysed formula does not alleviate symptoms, an amino acid-based formula can be tried. It is not appropriate to suggest that the mother switch to breastfeeding, as this decision should be respected. Even exclusively breastfed babies can develop cow’s milk protein intolerance, and in those cases, the mother should eliminate cow’s milk from her diet while continuing to breastfeed.

Understanding Cow’s Milk Protein Intolerance/Allergy

Cow’s milk protein intolerance/allergy (CMPI/CMPA) is a condition that affects around 3-6% of children, typically presenting in the first 3 months of life in formula-fed infants. Both immediate and delayed reactions can occur, with CMPA used for immediate reactions and CMPI for mild-moderate delayed reactions. Symptoms include regurgitation, vomiting, diarrhea, urticaria, atopic eczema, colic symptoms, wheeze, chronic cough, and rarely, angioedema and anaphylaxis. Diagnosis is often clinical, with investigations including skin prick/patch testing and total IgE and specific IgE (RAST) for cow’s milk protein.

Management for formula-fed infants includes using extensive hydrolyzed formula (eHF) milk as the first-line replacement formula for mild-moderate symptoms and amino acid-based formula (AAF) for severe CMPA or if no response to eHF. Around 10% of infants are also intolerant to soya milk. For breastfed infants, mothers should eliminate cow’s milk protein from their diet and consider prescribing calcium supplements to prevent deficiency. eHF milk can be used when breastfeeding stops until at least 6 months and up to 12 months of age.

The prognosis for CMPI is usually good, with most children becoming milk tolerant by the age of 3-5 years. However, a challenge is often performed in a hospital setting as anaphylaxis can occur. It is important to refer infants with severe symptoms to a pediatrician for management. Understanding CMPI/CMPA and its management can help parents and healthcare providers provide appropriate care for affected children.

If a child shows a preference for one hand before the age of 12 months, it may be a sign of cerebral palsy and should be addressed promptly. The appropriate course of action is to refer the child to a child development service for a comprehensive evaluation by a multidisciplinary team. Children with cerebral palsy typically receive specialized care from birth, but in some cases, the condition may be suspected in a primary care setting. According to NICE guidelines, delayed motor milestones such as not sitting by 8 months (adjusted for gestational age), not walking by 18 months (adjusted for gestational age), early asymmetry of hand function, and persistent toe-walking may indicate cerebral palsy. In this case, as the child is exhibiting hand preference before the age of 1 year and has a risk factor for cerebral palsy (low birth weight), an urgent referral is necessary. Other options are not appropriate and may delay diagnosis and treatment.

Common Developmental Problems and Possible Causes

Developmental problems can manifest in various ways, including referral points such as not smiling at 10 weeks, inability to sit unsupported at 12 months, and failure to walk at 18 months. Fine motor skill problems may also arise, such as abnormal hand preference before 12 months, which could indicate cerebral palsy. Gross motor problems are often caused by a variant of normal, cerebral palsy, or neuromuscular disorders like Duchenne muscular dystrophy. Speech and language problems should always be checked for hearing issues, as they can also be caused by environmental deprivation or general development delay.

It is important to recognize these developmental problems early on and seek appropriate interventions to address them. By doing so, children can receive the necessary support to reach their full potential and overcome any challenges they may face. With proper care and attention, many children with developmental problems can go on to lead happy and fulfilling lives.

If sitting without support is not achieved by 12 months, referral is necessary, although it should typically be achieved by 7-8 months.

Gross Motor Developmental Milestones

Gross motor skills refer to the ability to use large muscles in the body for activities such as crawling, walking, running, and jumping. These skills are essential for a child’s physical development and are achieved through a series of developmental milestones.
At 3 months, a baby should have little or no head lag when pulled to sit and should have good head control when lying on their abdomen. By 6 months, they should be able to lift and grasp their feet when lying on their back, pull themselves to a sitting position, and roll from front to back. At 9 months, they should be able to pull themselves to a standing position and crawl. By 12 months, they should be able to cruise and walk with one hand held. At 18 months, they should be able to walk unsupported and squat to pick up a toy. By 2 years, they should be able to run and walk up and down stairs holding onto a rail. At 3 years, they should be able to ride a tricycle using pedals and walk up stairs without holding onto a rail. By 4 years, they should be able to hop on one leg.

It is important to note that while the majority of children crawl on all fours before walking, some children may bottom-shuffle, which is a normal variant that runs in families. These milestones serve as a guide for parents and healthcare professionals to monitor a child’s physical development and identify any potential delays or concerns.

Epstein’s pearl, a type of congenital cyst found in the mouth, typically does not require any treatment. These cysts are commonly found on the hard palate, but can also be mistaken for a tooth eruption when located on the gums. They usually resolve on their own within a few weeks. Neonatal teeth, on the other hand, are rare and not typically found on the hard palate. Bohn’s nodules are mucous gland cysts that are usually located on the buccal or lingual aspects of the alveolar ridges, and rarely on the palate. A congenital ranula is a papule or nodule that is firm and translucent, and is typically found on the anterior floor of the mouth, lateral to the lingual frenulum.

Understanding Epstein’s Pearl

Epstein’s pearl is a type of cyst that is present in the mouth from birth. It is commonly found on the hard palate, but can also be seen on the gums, which may be mistaken for a tooth eruption. The good news is that no treatment is usually required as these cysts tend to disappear on their own within a few weeks.

Common Neonatal Gastrointestinal Disorders

There are several common gastrointestinal disorders that can affect newborns. These include pyloric stenosis, necrotising enterocolitis (NEC), congenital duodenal atresia, Hirschsprung’s disease, and tracheoesophageal fistula (TOF).

Pyloric stenosis is characterised by hypertrophy of the circular pyloric muscle, and typically presents with non-bilious, projectile vomiting in the third or fourth week of life. Constipation and dehydration may also occur, and biochemistry may show hypokalaemic metabolic alkalosis. Boys are more likely to be affected, especially if born into a family with affected girls.

NEC is a condition primarily seen in premature infants, where portions of the bowel undergo necrosis. Symptoms include bilious vomiting, distended abdomen, and bloody stools, with late signs including bowel perforation and multi-organ failure.

Congenital duodenal atresia is a congenital absence or complete closure of a portion of the lumen of the duodenum, and presents with bile-stained vomiting, abdominal distension, and inability to pass meconium.

Hirschsprung’s disease is characterised by the failure of ganglion cells to migrate into the hindgut, leading to functional intestinal obstruction. Symptoms include abdominal distension, bile-stained vomiting, and failure to pass meconium.

TOF refers to a communication between the trachea and oesophagus, usually associated with oesophageal atresia. Symptoms include choking, coughing, and cyanosis during feeding, excess mucus, and recurrent lower respiratory tract infections. Other congenital anomalies may also be present.

Overall, early recognition and management of these neonatal gastrointestinal disorders is crucial for optimal outcomes.

Macrosomia is more likely to occur in individuals with diabetes than microsomia.

Complications of Diabetes during Pregnancy

Diabetes during pregnancy can lead to various complications for both the mother and the baby. Maternal complications may include polyhydramnios, which occurs in 25% of cases and may be due to fetal polyuria. Preterm labor is also a common complication, occurring in 15% of cases and often associated with polyhydramnios.

Neonatal complications may include macrosomia, although diabetes can also cause small for gestational age babies. Hypoglycemia is another potential complication, which can occur due to beta cell hyperplasia. Respiratory distress syndrome may also occur, as surfactant production is delayed. Polycythemia, which leads to more neonatal jaundice, is also a possibility.

Malformation rates may increase 3-4 fold, with sacral agenesis, CNS and CVS malformations (hypertrophic cardiomyopathy) being some of the potential risks. Stillbirth is also a possibility. Hypomagnesemia and hypocalcemia may occur, and shoulder dystocia may cause Erb’s palsy.

Abdominal wall hernias occur when an organ or the fascia of an organ protrudes through the wall of the cavity that normally contains it. Risk factors for developing these hernias include obesity, ascites, increasing age, and surgical wounds. Symptoms of abdominal wall hernias include a palpable lump, cough impulse, pain, obstruction (more common in femoral hernias), and strangulation (which can compromise the bowel blood supply and lead to infarction). There are several types of abdominal wall hernias, including inguinal hernias (which account for 75% of cases and are more common in men), femoral hernias (more common in women and have a high risk of obstruction and strangulation), umbilical hernias (symmetrical bulge under the umbilicus), paraumbilical hernias (asymmetrical bulge), epigastric hernias (lump in the midline between umbilicus and xiphisternum), incisional hernias (which may occur after abdominal surgery), Spigelian hernias (rare and seen in older patients), obturator hernias (more common in females and can cause bowel obstruction), and Richter hernias (a rare type of hernia that can present with strangulation without symptoms of obstruction). In children, congenital inguinal hernias and infantile umbilical hernias are the most common types, with surgical repair recommended for the former and most resolving on their own for the latter.

Escherichia coli is the most frequent organism responsible for UTIs in both children and adults. Streptococcus pneumonia is more commonly associated with pneumonia or otitis media, while Staphylococcus aureus is more likely to cause skin infections like impetigo. Herpes is a viral infection that causes oral or genital ulcerations and whitlow. Although not impossible, a fungal-induced UTI is unlikely.

Investigating Urinary Tract Infections in Children

When a child develops a urinary tract infection (UTI), it is important to consider the possibility of underlying causes and kidney damage. Unlike in adults, UTIs in children can lead to renal scarring. The National Institute for Health and Care Excellence (NICE) has provided guidelines for imaging the urinary tract in children with UTIs. Infants under six months of age who have their first UTI and respond to treatment should have an ultrasound within six weeks. However, children over six months of age who respond to treatment for their first UTI do not require imaging unless there are features suggestive of an atypical infection or recurrent infection.

Features that suggest an atypical infection include being seriously ill, having poor urine flow, an abdominal or bladder mass, raised creatinine, septicemia, failure to respond to suitable antibiotics within 48 hours, or infection with non-E. coli organisms. If any of these features are present, further investigations may be necessary. Urine should be sent for microscopy and culture, as only 50% of children with a UTI have pyuria. A static radioisotope scan, such as DMSA, can identify renal scars and should be done 4-6 months after the initial infection. Micturating cystourethrography (MCUG) can identify vesicoureteric reflux and is only recommended for infants under six months of age who present with atypical or recurrent infections.