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Children with myopia (nearsightedness) can see close up, but have problems seeing things far away.

Myeloproliferative neoplasms (MPNs) are a rare, closely related group of blood disorders in which the bone marrow overproduces red blood cells, white blood cells, or platelets.

Niemann-Pick disease is a rare genetic condition that affects many of the body’s organs and systems, including the central nervous system.

Necrotizing enterocolitis (NEC) is a serious intestinal illness in babies that results in the death of intestinal tissues.

Nervous system disorders can involve a range of conditions that may be chronic or may be triggered by secondary factors.

Neck masses are rarely cancerous. The majority are benign enlarged lymph nodes caused by infection or inflammation.

Niemann-Pick disease type B is a rare genetic condition that affects many of the body’s organs and systems, including the central nervous system.

Niemann-Pick disease is a rare genetic condition that affects many of the body’s organs and systems, including the central nervous system.

Neonatal stroke is stroke in newborns between birth and 28 days.

Nursemaid’s elbow (“pulled elbow”) occurs when the ligament that holds the radius in place at the elbow joint slips and the end of the radius shifts out of position.