NAFLD stands for nonalcoholic fatty liver disease. It describes excess fat in the liver that is not primarily explained by significant alcohol use. NAFLD is commonly used in hepatology and gastroenterology to classify metabolic-associated liver injury. It appears in clinic notes, imaging reports, and lab-based risk assessments for chronic liver disease.

Fatty Liver refers to excess fat accumulation within liver cells (hepatocytes). In clinical language, this is called hepatic steatosis. It is commonly discussed in primary care and gastroenterology when liver enzymes are abnormal or imaging shows “fatty infiltration.” It can occur without symptoms and may be discovered incidentally.

Liver Fibrosis is the buildup of scar-like tissue in the liver after repeated or long-lasting injury. It reflects a wound-healing response that becomes excessive and disorganized over time. Clinicians use the term to describe disease stage and risk of complications. It is commonly discussed in chronic liver diseases such as viral hepatitis, alcohol-associated liver disease, and metabolic dysfunction-associated steatotic liver disease.

Cirrhosis is advanced, long-standing scarring of the liver that disrupts normal liver structure and function. It develops after repeated or chronic liver injury from many possible causes. In clinical medicine, Cirrhosis is used as a diagnosis and staging term that signals higher risk of complications. It is commonly discussed in gastroenterology, hepatology, internal medicine, surgery, radiology, and critical care.

Alcoholic Hepatitis is an inflammatory liver injury that occurs in the setting of heavy alcohol use. It is a clinical diagnosis used to describe a characteristic pattern of symptoms, laboratory findings, and liver dysfunction. It commonly appears in hospital medicine, gastroenterology, and hepatology when a patient presents with jaundice and systemic inflammation. It is part of the broader spectrum of alcohol-associated liver disease.

Autoimmune Hepatitis is a chronic inflammatory disease of the liver. It happens when the immune system attacks liver cells (hepatocytes). Clinicians use the term in hepatology to describe a treatable cause of hepatitis not due to infection or toxins. It is commonly discussed in gastroenterology clinics, liver units, and pathology reports.

Hepatitis C is a viral infection that primarily affects the liver. It is caused by the Hepatitis C virus (HCV). It is commonly discussed in gastroenterology and hepatology because it can lead to chronic liver inflammation and scarring. It is also used as a public health term in screening, diagnosis, and treatment programs for blood-borne infections.

Hepatitis B is a viral infection that primarily affects the liver. It can cause short-term (acute) hepatitis or long-term (chronic) liver disease. In clinical medicine, it is commonly discussed in screening, diagnosis, and liver disease monitoring. In public health, it is used as a framework for vaccination and transmission prevention.

Hepatitis A is a viral infection that causes inflammation of the liver. It is typically acquired through the fecal–oral route, often via contaminated food or water. In clinical practice, it is commonly discussed as a cause of acute hepatitis and a vaccine-preventable disease. It is relevant in outpatient care, emergency settings, travel medicine, and public health.