Allergy ( --> Hypersensitivity) - Damaging immune response by the body to a substance, especially a particular food, pollen, fur, or dust, to which it has become hypersensitive.

 Antiphospholipid Syndrome

 Autoimmune Diseases - Disease caused by antibodies or lymphocytes produced against substances naturally present in the body.

 Digeorge Syndrome

 Graft vs Host Disease

 Granulomatous Disease, Chronic

 Hughe's Syndrome ( --> Antiphospholipid Syndrome)

 Hypersensitivity

 Multiple Chemical Sensitivity ( --> Hypersensitivity, Immediate)

 Purpura, Schoenlein-Henoch - Henoch-Schönlein purpura (anaphylactoid purpura) is the most common connective-tissue disorder in children. It is characterized by a purpuric rash, painful swollen joints, and abdominal pain with vomiting. In a minority of patients, the kidneys become involved and nephritis develops; this is the only complication that may cause permanent damage. 

Henoch-Schönlein purpura (anaphylactoid purpura) is the most common connective-tissue disorder in children. It is characterized by a purpuric rash, painful swollen joints, and abdominal pain with vomiting. In a minority of patients, the kidneys become involved and nephritis develops; this is the only complication that may cause permanent damage. 

 Samters Syndrome

 Severe Combined Immunodeficiency

 Sjogren's Syndrome - Also called SICCA SYNDROME, chronic inflammatory disorder characterized by severe dryness of the eyes and the mouth that results from a diminution in secretion of tears and saliva.