Explore the signs and symptoms, genetic cause, and inheritance pattern of various health conditions.

• Jackson-Lawler syndrome (PC-2), see Pachyonychia congenita
• Jackson-Weiss syndrome
• Jacob's syndrome, see 47,XYY syndrome
• Jacobsen syndrome
• Jacobsen thrombocytopenia, see Jacobsen syndrome
• Jadassohn-Lewandowski syndrome (PC-1), see Pachyonychia congenita
• Jaeken syndrome, see PMM2-congenital disorder of glycosylation
• JAK3 SCID, see JAK3-deficient severe combined immunodeficiency
• JAK3-deficient severe combined immunodeficiency
• Jankovic-Rivera syndrome, see Spinal muscular atrophy with progressive myoclonic epilepsy
• Jansen-de Vries syndrome
• Jansky-Bielschowsky disease, see CLN5 disease
• Jansky-Bielschowsky disease, see CLN2 disease
• Janz syndrome, see Juvenile myoclonic epilepsy
• Japanese autoinflammatory syndrome with lipodystrophy, see Nakajo-Nishimura syndrome
• Jarcho-Levin syndrome, see Spondylothoracic dysostosis
• Jarcho-Levin syndrome, see Spondylocostal dysostosis
• JASL, see Nakajo-Nishimura syndrome
• Jaundice, chronic idiopathic, see Dubin-Johnson syndrome
• JBTS, see Joubert syndrome
• JDVS, see Jansen-de Vries syndrome
• JEB, see Junctional epidermolysis bullosa
• JEB-LOC, see Laryngo-onycho-cutaneous syndrome
• Jensen syndrome, see Deafness-dystonia-optic neuronopathy syndrome
• Jervell and Lange-Nielsen syndrome
• Jervell-Lange Nielsen syndrome, see Jervell and Lange-Nielsen syndrome
• Jeune syndrome, see Asphyxiating thoracic dystrophy
• Jeune thoracic dysplasia, see Asphyxiating thoracic dystrophy
• Jeune thoracic dystrophy, see Asphyxiating thoracic dystrophy
• JIA, see Juvenile idiopathic arthritis
• JIP, see Juvenile polyposis syndrome
• JLNS, see Jervell and Lange-Nielsen syndrome
• Job syndrome, see Autosomal dominant hyper-IgE syndrome
• Job's syndrome, see Autosomal dominant hyper-IgE syndrome
• Job-Buckley syndrome, see Autosomal dominant hyper-IgE syndrome
• JOD, see Type 1 diabetes
• Joubert syndrome
• Joubert-Bolthauser syndrome, see Joubert syndrome
• JPD, see Juvenile Paget disease
• JPLS, see Juvenile primary lateral sclerosis
• JPS, see Juvenile polyposis syndrome
• JRA, see Juvenile idiopathic arthritis
• Junctional epidermolysis bullosa
• Junctional epidermolysis bullosa with pyloric atresia, see Epidermolysis bullosa with pyloric atresia
• Juvenile Batten disease, see CLN3 disease
• Juvenile cerebroretinal degeneration, see CLN3 disease
• Juvenile chronic arthritis, see Juvenile idiopathic arthritis
• Juvenile diabetes, see Type 1 diabetes
• Juvenile gout, choreoathetosis, mental retardation syndrome, see Lesch-Nyhan syndrome
• Juvenile hereditary epithelial dystrophy, see Meesmann corneal dystrophy
• Juvenile hyperuricemia syndrome, see Lesch-Nyhan syndrome
• Juvenile idiopathic arthritis
• Juvenile intestinal polyposis, see Juvenile polyposis syndrome
• Juvenile macular degeneration, see Stargardt macular degeneration
• Juvenile myoclonic epilepsy
• Juvenile neuronal ceroid lipofuscinosis, see CLN3 disease
• Juvenile Paget disease
• Juvenile Paget's disease, see Juvenile Paget disease
• Juvenile pernicious anemia with proteinuria due to selective intestinal malabsorption of vitamin B12, see Imerslund-Gräsbeck syndrome
• Juvenile PLS, see Juvenile primary lateral sclerosis
• Juvenile polyposis syndrome
• Juvenile primary lateral sclerosis
• Juvenile primary osteoporosis
• Juvenile RA, see Juvenile idiopathic arthritis
• Juvenile retinoschisis, see X-linked juvenile retinoschisis
• Juvenile rheumatoid arthritis, see Juvenile idiopathic arthritis
• Juvenile subacute necrotizing encephalopathy, see Leigh syndrome
• Juvenile sulfatidosis, Austin type, see Multiple sulfatase deficiency
• Juvenile-onset diabetes, see Type 1 diabetes
• Juvenile-onset diabetes mellitus, see Type 1 diabetes
• Juxtaglomerular hyperplasia with secondary aldosteronism, see Bartter syndrome
• JWS, see Jackson-Weiss syndrome