MedGen

A rare, genetic, primary orthostatic disorder characterized by dizziness, palpitations, fatigue, blurred vision and tachycardia following postural change from a supine to an upright position, in the absence of hypotension. A syncope with transient cognitive impairment and dyspnea may also occur. The norepinephrine transporter deficiency leads to abnormal uptake and high plasma concentrations of norepinephrine. [from ORDO]

Inability to conceive for at least one year after trying and having unprotected sex. Causes of female infertility include endometriosis, fallopian tubes obstruction, and polycystic ovary syndrome. Causes of male infertility include abnormal sperm production or function, blockage of the epididymis, blockage of the ejaculatory ducts, hypospadias, exposure to pesticides, and health related issues. [from NCI]

A disorder with homogeneous therapeutic possibilities and an identified pathophysiological mechanism. Developmental anomalies are excluded. [from ORDO]

Significant bleeding or hemorrhage without significant precipitating factor. [from HPO]

An abnormally increased sensitivity to the effects of ionizing radiation. [from HPO]

Recurrent episodes of apnea that are precipitated by factors such as illness, fatigue, or stress. [from HPO]

A disorder either associated with an increased risk for malignant transformation (e.g., intraepithelial neoplasia, leukoplakia, dysplastic nevus, myelodysplastic syndrome) or that develops as a result of the presence of an existing malignant neoplasm (e.g., paraneoplastic syndrome). [from NCI]