A childhood disorder predominately affecting boys and similar to autism (AUTISTIC DISORDER). It is characterized by severe, sustained, clinically significant impairment of social interaction, and restricted repetitive and stereotyped patterns of behavior. In contrast to autism, there are no clinically significant delays in language or cognitive development. (From DSM-IV)

Conceptual response of the person to the various aspects of death, which are based on individual psychosocial and cultural experience.

An extensive order of basidiomycetous fungi whose fruiting bodies are commonly call mushrooms.

Congenital absence of the eye or eyes.

A rare autosomal recessive familial disorder of cholesterol metabolism, characterized by extremely low HDL-cholesterol, reduced total cholesterol, and increased triglyceride levels in serum. Clinical features include the onset before age 20 years of HEPATOMEGALY; SPLENOMEGALY; the deposition of cholesterol in each TONSIL (creating a yellow-orange appearance); and RETINITIS PIGMENTOSA. A sensorimotor or distal sensory POLYNEUROPATHY occurs in approximately 50% of affected individuals. The condition is associated with decreased synthesis and increased catabolism of APOLIPOPROTEIN A-I and APOLIPOPROTEIN A-II, and a defect in cellular signaling and mobilization of lipids. (From Nat Genet 1998 Sep;20(1):96-8; Adams et al., Principles of Neurology, 6th ed, pp1347-8; Menkes, Textbook of Child Neurology, 5th ed, p118)

The male reproductive organs. They are divided into the external organs (penis, scrotum, and urethra) and the internal organs (testis, epididymis, ductus deferens, seminal vesicle, ejaculatory duct, prostate, and bulbourethral gland.

A more or less comprehensive review of the literature on a specific subject, with usually an extensive critical analysis and synthesis of the literature.

A more or less comprehensive review of the literature on a specific subject, with usually an extensive critical analysis and synthesis of the literature.

A more or less comprehensive review of the literature on a specific subject, with usually an extensive critical analysis and synthesis of the literature.

An autosomal dominant disorder characterized by a high incidence of bilateral acoustic neuromas as well as schwannomas (NEURILEMMOMA) of other cranial and peripheral nerves, and other benign intracranial tumors including meningiomas, ependymomas, spinal neurofibromas, and gliomas. The disease has been linked to mutations of the NF2 gene (GENES, NEUROFIBROMATOSIS 2) on chromosome 22 (22q12) and usually presents clinically in the first or second decade of life.