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Monoclonal gammopathy of undetermined significance (MGUS)
When bone marrow produces an unusual protein in the blood, it can sometimes lead to certain types of blood cancer.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
Nicotine dependence
Nicotine dependence can be tough to kick, but treatments and resources are available to boost your chances of success.
Orchitis
This inflammation of one or both testicles can cause pain and infertility. It's usually caused by a bacterial infection or the mumps virus.
Pericarditis
Inflammation of the tissue surrounding the heart can cause sharp chest pain and other symptoms. Know how pericarditis is diagnosed and treated.
Peyronie disease
Understand what causes bent and painful erections and learn what treatments are available.
Post-vasectomy pain syndrome
Learn about post-vasectomy pain syndrome (PVPS) — How it happens after a vasectomy, tests to diagnose it and treatment options.
Premature ejaculation
Understand what may cause ejaculation to happen earlier than wanted during sex. Also learn how to treat and prevent it.
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
Primary progressive aphasia
Find out more about this type of dementia that affects the speech and language areas of the brain.
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