Progressive supranuclear palsy is a disorder in a small section of the brain that causes weakness of certain muscles.This is a rare disorder but may be mistaken for Parkinson's disease.

A possible occult fracture is a suspected fracture that needs to be confirmed with other imaging tests. Read on to learn more.

An osteoid osteoma is a type of bone tumor. It isn't cancer (benign). It stays in the same place it starts. It won't spread to other bones or parts of your body. Read on to learn more.

Methicillin-resistant Staphylococcus aureus (MRSA) is a type of bacteria. Bacteria that can't be killed by the antibiotic methicillin and other similar medicines are called methicillin-resistant. Community-acquired means that you didn't get the infection in a hospital or other healthcare setting. MRSA infections are sometimes very hard to treat.

Human cytomegalovirus (CMV) is a type of virus. Viruses are tiny organisms that can enter your body and cause disease. CMV is related to the virus that causes herpes. Like many other viruses, CMV can invade human cells. It can then use those cells to reproduce and spread. If the virus makes many copies of itself, it may disrupt how cells normally work.

Inappropriate sinus tachycardia (IST) is a health problem in which the heart beats very quickly without a good reason. It is a type of heart rhythm abnormality called an arrhythmia. Read on to learn more about causes, symptoms, diagnosis, and treatment.

Ptosis is when the upper eyelid droops down more than it should. If the ptosis is severe, it may block vision.

A pterygium is a type of noncancer growth on your eye. It is often only a minor problem unless it causes vision problems.

Premature ventricular contractions, or PVCs, are a type of abnormal heartbeat. Read on to learn more about their cause, symptoms, diagnosis, and treatment.

Restrictive cardiomyopathy, or RCM, is when the chambers of the heart become stiffer over time. Read on to learn details about this condition.