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Dr Sameer Zar

Dr Sameer Zar
Gastroenterology
South London


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Dr Sameer Zar

MB BS FRCP PhD

Gastroenterology
London


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Dr Sameer Zar areas of expertise:

  • Colonoscopy
  • ERCP
  • Gastric reflux

Professional statement

Sameer Zar is a highly-experienced London-based gastroenterologist. Practising at a number of reputable clinics in the capital including the Royal Marsden Hospital, he specialises in a number of aspects of his field such as endoscopy, colonoscopy, Barrett’s, reflux, dyspepsia, IBS, IBD and liver diseases. He has been published extensively in peer-reviewed journals and forms an integral part of various national and international professional bodies including the American Society for Gastrointestinal Endoscopynumerous.


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 Credentials

GMC: 4598859

 Professional experience

• More than 20 years of experience
• Consultant Gastroenterologist, Epsom & St Helier NHS Trust, London (present)
• Consultant Gastroenterologist, Royal Marsden Hospital, London (present)
• Consultant Gastroenterologist, Spire St Anthony's Hospital, London (present)
• Consultant Gastroenterologist, Spire Gatwick Park Hospital, London (present)
• Consultant Gastroenterologist, The Lister Hospital, London (present)

 ...

 Sub-specialties

• Gastroenterology
• Endoscopy and colonoscopy
• ERCP
• EUS
• EMR and ESD
• Videocapsule

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 Education

• PhD, University of London
• Postgraduate training in General Medicine & Gastroenterology, South West Thames Scheme, London

 Professional membership

• Member, American Gastroenterological Association (AGA)
• Member, Annals of Gastroenterology
• Member, Hepato-Pancreato-Biliary Network
• Member, American Society for Gastrointestinal Endoscopy (ASGE)

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Languages spoken

  • English
  • Hindi
  • Urdu

Diseases, Medical Tests and Treatments

Colonoscopy

A colonoscopy is when an endoscope is used to examine the colon and small intestine. It is performed with a small, thin tube (endoscope), which is ins ...

ERCP

ERCP or endoscopic retrograde cholangiopancreatography is a test that examines the pancreas or bile ducts to treat stones or tumours among other condi ...

Gastric reflux

Gastroesophageal reflux is a digestive disorder where acid from the stomach leaks back into the oesophagus. It usually occurs because of weakness in t ...

Abdominal pain

Abdominal pain is a symptom of a variety of conditions. It is the pain felt in the area between the chest and groin. It occurs for different reasons, ...

Anal fissure

An anal fissure is a tear in the outer skin of the anus, which causes severe pain in the anus during and after defecation. The most common causes of anorectal fissures are constipation and diarrhoea, but may also occur due to infections such as tuberculosis and syphilis. Diagnosis is performed by applying an anal inspection, if a lot of pain, a local anaesthetic. More than half of cases of rectal fissure heal without treatment, simply acquiring healthy habits such as consumption of fibre. In cases where the lesion does not heal by itself, it is used to surgery, performed through a tiny cut in the anal sphincter to relax and allow further processing of the fissure.  ...

Bloated stomach

Bloated stomach is a condition that much of the population suffer from. Symptoms include air in the stomach, bloating, and abdominal distension. It can have causes including fluid accumulation in the stomach, gas in the intestine by overeating fibre-rich or heavy foods, and air swallowing (due to nervous habit), among others. Eating too much and too quickly can also produce bloating as well as swallowing too much air while eating. ...

Cirrhosis

Cirrhosis is the impairment of an organ due to the proliferation of fibrous tissue and the consequent atrophy of the cells. One of the most common manifestations of this disease is liver cirrhosis, which affects the liver and produces chronic organ damage. There are two main causes for liver cirrhosis: alcoholism and hepatitis C infection. Symptoms of liver cirrhosis include yellowing of the skin, mucous membranes and eyes, weakness and loss of weight, vomiting blood or blood in the stool. It is an irreversible and chronic disease that can lead to many complications and causes liver malfunction, and in extreme cases, the patient may need a transplant. Hepatic biliary cirrhosis is a rare disease that causes inflammation of the bile ducts of the liver, so it blocks the flow of bile, an essential fluid for the proper functioning of this organ. ...

Colic

A Colic is a type of abdominal pain that varies in intensity. The cause is an increase, sometimes violent, in the peristaltic movements of the abdominal hollow viscera. It can be accompanied by nausea, vomiting and diarrhoea. It can also produce irritability, tension, and stress. ...

Colitis

Colitis is the inflammation of the colon and causes abdominal pain and diarrhoea. There are different types of colitis depending on the severity of the cases, and the treatments vary accordingly. One of the most common is the nervous colitis, which appears when the person is under constant stress. In this case it is important to reduce the levels of stress. Furthermore, pseudomembranous colitis is one of the most aggressive forms of this inflammation, caused by bacteria. It usually occurs in people who have been treated with antibiotics, and in patients with weakened immune systems due to other causes. It is a disease that weakens the patient and can have fatal consequences, making it necessary to initiate a shock treatment with antibiotics. Ulcerative colitis is also another very common type, which affects the lining of the colon and rectum, and which cause is unknown. The symptoms of ulcerative colitis can include mouth sores and joint pain, in addition to the ones typical of this illness. ...

Constipation

Constipation is the regular difficulty encountered when trying to defecate, considering a normal frequency of a minimum of three times per week, although this can vary with each person. Constipation is a condition that is produced by the lack of regular movement of the intestines and bowel evacuation may be accompanied by pain. It is a very common ailment that occurs because of sedentary lifestyle, lack of fibre consumption, fatigue and nervousness. To avoid this problem it is recommended to follow a diet rich in fibre, drink plenty of water and exercise regularly. Although it is possible to resort to laxatives sporadically, they should not be abused as they may cause the opposite effect in the long run, as well as make the body get used to them, which can make the situation worse. ...

Diabetes

Diabetes is a disease, characterised by a significant increase in blood glucose levels (hyperglycaemia). Usually, the symptoms include fatigue, emaciation produced in a short time, excessive thirst and frequent and increased urination (especially at night). This pathology is caused by low levels of insulin, or complete lack of it, as the patient’s pancreas no longer produces it. The latter case is type I diabetes, which surfaces in childhood. In the case of those with diabetes type I, they have to follow an insulin treatment for life, an appropriate diet to control the blood glucose levels throughout the day and good habits of physical exercise. In contrast, type II diabetes is a consequence of hypertension, high cholesterol, and obesity, among other causes. It requires more control over diet and sometimes treatment with oral antidiabetic (pills). Some women also develop diabetes during pregnancy due to unbalanced blood glucose levels, which causes gestational diabetes. ...

Eating disorders

Eating disorders are serious behavioural problems. A person who suffers from eating disorders follows eating patterns that can seriously damage his/her health. The common causes and symptoms of this disease include excessive concern about their weight, a distorted view of the body and low self-esteem. The most common eating disorders are anorexia and bulimia nervosa. When a person suffers from anorexia, he/she avoids eating and/or takes laxatives and diuretics. In addition to this, the person may also do intense physical exercise, which could endanger her/his life. The main characteristic of bulimia is that people do binge eating, followed by purging or self-induced vomiting to eliminate and compensate for overeating. All this with a sense of guilt. In these cases, the emergency treatment of patients through a comprehensive plan that includes psychotherapy and continuous monitoring is crucial. In severe cases, the admission of patients to a specialised centre for treatment may be necessary. ...

Food intolerance

Food intolerance is the adverse reaction of the body to the ingestion of certain foods, additives and preservatives, which cause the immune system to produce antibodies against the proteins of certain food substances. Some of the most common foods that cause food intolerance are milk, eggs, some types of flour and yeast, or nuts. Symptoms or manifestations include diarrhoea, stomachache or headache, acne or skin problems and fatigue. A food allergy triggers a much faster reaction in the immune system and could be dangerous (urticaria, eczema, swelling, difficulty breathing), so it is imperative to seek urgent medical help since in serious cases it can even lead to the death of the patient. Whether it is a case of food intolerance or allergy, you should consult with a doctor to find out which foods are causing the reactions to start a treatment. The treatment usually involves keeping an eye on the diet to avoid eating the food that causes the problem. ...

Gastrointestinal bleeding

Gastrointestinal bleeding is the bleeding that occurs in the digestive tract. Upper gastrointestinal bleeding is the bleeding that occurs in the oesophagus, stomach or upper part of the small intestine. Lower gastrointestinal bleeding is the one that happens in the rest of the small intestine, large intestine, rectum or anus. The condition can be detected by the presence of blood in the stool....

Haemorrhoids

Hemorrhoids, also known commonly as piles, are the dilation of a vein in the rectum or anus. This is a very common and painful condition that is usually caused by constipation, genetic predisposition, being too long standing, or associated with pregnancy. There are two variations of this pathology:external and internal hemorrhoids. The first generate protrusions on the ring on the outside of the anus, so they are easier to diagnose and cause pain when sitting, as well as traces of blood in stool. Treatment consists in applying creams and warm water in the affected area and in cases of severe pain, taking painkillers. On the other hand, internal hemorrhoids occur inside the anus, causing bleeding in the stool and itching in the anal region. If they grow, a surgical intervention may be necessary to remove. ...

Halitosis

Halitosis is bad breath. The causes of this disorder may be oral (Problems with teeth, gums, saliva, tongue ...) or extra-oral (respiratory disorders, digestive disorders or organic or consumption of alcohol). Normally, halitosis originates in the mouth, as a result of bacterial decomposition of food waste. Treatment may involve: removing tartar or plaque, or extraction of teeth with caries, flossing and antiseptic fluorine, applying a brushed three times a day, avoid alcohol and coffee. Halitosis can affect people psychologically affected, as they may have problems in their family and social life. ...

Helicobacter pylori

Helicobacter pylori is a genus of bacteria that affects the human stomach. It grows in the mucous layer of the stomach, secreting urease, an enzyme that converts the urea (a chemical very important for the metabolism) in ammonia. As a result, the acidity of the stomach is neutralised and an environment prone to the proliferation of the pylori bacteria is created. It is transmitted through direct contact with an infected person and is characterised by severe abdominal pain, nausea, loss of appetite and weight or bloating. In order to avoid further complications, it is crucial to eliminate the Helicobacter pylori as soon as the symptoms appear. Complications may include abdominal infection, peritonitis, haemorrhages or ulcers and it can also increase the risk of stomach cancer. The treatment includes antibiotics, to cope with or prevent infections; anti-ulcer medicines, to decrease the amount of acid produced in the stomach; and surgery, in case the infection has caused ulcers. It is also important to follow a proper diet and it is advisable to increase the fibre intake. ...

Malnutrition

Malnutrition is the result of eating an unbalanced diet in which there is a lack of nutrients or in which the nutrients are taken in the wrong proportion. One of the main causes may be overeating. Malnutrition increases the risk of infection or infectious diseases. ...

Morbid obesity

Morbid obesity is also known as severe obesity or class III obesity. People are considered morbidly obese when their body mass index is above 40, or even 35 if the patient has a disease or severe disability as a result of being overweight. In many countries it is a public health problem due to the new eating habits of the society. Morbid obesity can be treated with a low calorie diet and regular exercise. In extreme cases patients can have bariatric surgery. ...

Obesity

Obesity is a disease which refers to an excess in body fat, having a detrimental effect on on one's health. This condition is easily diagnosed by assessing the body mass index and overall constitution of the person. The factors that cause this disease include a sedentary lifestyle, poor diet, and genetic and environmental factors. Additionally, obesity is often aggravated by a number of other associated condtions such as diabetes, high cholesterol, triglycerides, and hypertension. It may also cause certain psychological problems. People suffering from this disease are at high risk of having cardiovascular diseases, particularly those with abdominal obesity (an indicator of insulin resistance). The treatment of obesity consists on following the recommendations of endocrinologists and nutritionists, which may include a healthy eating plan and changes to daily routines, especially when it comes to exercise. It is also important to establish these routines from childhood to prevent development of childhood obesity. ...

Pancreatitis

Pancreatitis is a condition of the pancreas (a gland in the stomach responsible for secreting digestive juices into the small intestine) that causes inflammation. There are two varieties of pancreatic disease: acute pancreatitis and chronic pancreatitis. The mildest is acute pancreatitis, which is usually caused by gallstones and causes vomiting, nausea, and abdominal pain. It requires hospitalisation and the administration of antibiotics and analgesics intravenously. On the other hand, chronic pancreatitis, for which there is no cure and the causes are often related to alcohol abuse, also causes vomiting, nausea, abdominal pain, as well as weight loss and fatty stools. During initial treatment, as in the case of acute pancreatitis, it requires hospitalisation and medication, but when the patient is discharged, he/she must follow a special personalised diet and avoid smoking and alcohol throughout his/her life. ...

Stomach ulcer

  Gastric ulcer is a sore or erosion that occurs in the stomach or upper duodenum, in this case as a peptic ulcer. This is a very common gastrointestinal ailment and whose size usually varies between 0.5 and 1.5 centimeters in diameter. The causes stomach ulcers are multiple, being intimately related to stress and health status of each patient. As for symptoms, gastric ulcer is characterized by an acute stomach pain, changes in bowel habits, nausea and vomiting. Your treatment begins mitigate their symptoms through gastric protectors and antacids and, in the case in question of a bleeding ulcer, it is necessary to stop the bleeding by endoscopy. Also, in the most serious cases it will be resorted to surgery, either by removing part of the stomach as intervening in the vagus nerve, responsible for monitoring the production of gastric acid in the body. ...

Ultrasound

Ultrasound is a diagnostic imaging procedure that allows you to view organs and soft structures within the body. It is made using high-frequency sound waves that are emitted by a transducer that captures the echo of different amplitudes which occurs when bouncing off the organs. These signals, when processed by a computer, give a series of images of the tissues examined. Today ultrasounds can be two-dimensional, three-dimensional or 4-dimensional images. Ultrasound is a non-invasive technique, in which no radiation is used so can be used to visualise foetuses that are being formed. This procedure can differentiate clearly the shape and size of each structure within the body. In medicine, it is used to see the heart, kidneys, liver and blood vessels, among other organs. ...

Viral Hepatitis

Hepatitis is an inflammatory disease that affects the liver and, as a result, causes it to malfunction. Hepatitis can be caused by immune cells of the body that attack the liver, virus infections, of which six types are known: A, B, C, D, E, and G; liver damage caused by excess of alcohol or toxic substances and, finally, due to overdoses of medications such as acetaminophen. The evolution and complications of the disease are different in each case. The main symptoms of hepatitis are fatigue, nausea and vomiting, high fever and headaches, pharyngitis and cough. In addition to these symptoms, there is a diffuse pain in the liver and a yellowish colour of the skin. ...

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Other information about Sameer Zar

Source: All information contained on this page as well as office hours available, are provided directly by the doctor who has the ability to update them at all times in order to keep the information as accurate as possible.
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    First consultation: Between £250-£350
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