cough, pain in several joints, poor appetite, weight loss

Human immunodeficiency virus (HIV) is a retrovirus that causes acquired immunodeficiency syndrome (AIDS), a condition in humans in which the immune system begins to fail, leading to life-threatening opportunistic infections. Previous names for the virus include human T-lymphotropic virus-III (HTLV-III), lymphadenopathy-associated virus (LAV), and AIDS-associated retrovirus (ARV). ... 

muscle cramps in leg(s), swollen feet, swollen feet and legs, weight loss

Malabsorption can result from a wide range of diseases. Typically, malabsorption can be the failure to absorb specific sugars, fats, proteins, or vitamins. It can also be a general malabsorption of food. Diarrhea, bloating or cramping, failure to thrive, frequent bulky stools, muscle wasting, and a distended stomach may accompany malabsorption. ... 

puffy face, stomach pain, upper abdominal pain, vomiting

delayed development, face deformities, heart murmur, low muscle tone

Down syndrome or trisomy 21 (also Down's syndrome) is a genetic disorder caused by the presence of all or part of an extra 21st chromosome. It is named after John Langdon Down, the British doctor who first described it in 1866. The condition is characterized by a combination of major and minor differences in body structure. Often Down syndrome is associated with some impairment of cognitive ability and physical growth as well as facial appearance. Down syndrome is usually identified at birth. ... 

lump or swelling in groin in males, lump(s) in skin, pain in several joints, poor appetite

Sarcoidosis (also called sarcoid or Besnier-Boeck disease) is an immune system disorder characterised by non-necrotising granulomas (small inflammatory nodules). Virtually any organ can be affected; however, granulomas most often appear in the lungs (D86.0) or the lymph nodes (D86.1). Symptoms can occasionally appear suddenly but usually appear gradually. When viewing X-rays of the lungs, sarcoidosis can have the appearance of tuberculosis or lymphoma. ... 

pain in several joints, rash, swollen joint(s), weakness

Mixed connective tissue disease (MCTD) or Sharp's syndrome is a human autoimmune disease in which the immune system attacks the body. MCTD combines features of polymyositis, systemic lupus erythematosus, and systemic scleroderma and is thus considered an overlap syndrome. MCTD commonly causes joint pain/swelling, Raynaud phenomenon, muscle inflammation, and scarring of the skin of the hand. It does not typically cause kidney disease or seizures. Distinguishing laboratory characteristics are a positive, speckled anti-nuclear antibody and an anti-U1-RNP antibody. ... 

confusion, delayed development, high blood pressure, poor appetite

Lead poisoning is a medical condition, also known as saturnism, plumbism or painter's colic, caused by increased blood lead levels. ... 

blister(s) or bump(s) on skin, difficulty walking, limitation of movement, pain in several joints

Rheumatoid arthritis (RA) is traditionally considered a chronic, inflammatory autoimmune disorder that causes the immune system to attack the joints. It is a disabling and painful inflammatory condition, which can lead to substantial loss of mobility due to pain and joint destruction. RA is a systemic disease, often affecting extra-articular tissues throughout the body including the skin, blood vessels, heart, lungs, and muscles. ... 

swollen feet, swollen feet and legs, vision problems, weight loss

Short bowel syndrome is a malabsorption disorder caused by either the surgical removal of the small intestine or the loss of its absorptive function due to diseases. ... 

difficulty swallowing, rash, redness in skin, swollen joint(s)

Sjögren's syndrome is an autoimmune disorder in which immune cells attack and destroy the exocrine glands that produce tears and saliva. It is named after Swedish ophthalmologist Henrik Sjögren (1899-1986), who first described it. Sjögren's syndrome is also associated with rheumatic disorders such as rheumatoid arthritis, and it is rheumatoid factor positive in 90 percent of cases. The hallmark symptoms of the disorder are dry mouth and dry eyes (part of what are known as sicca symptoms). In addition, Sjögren's syndrome may cause skin, nose, and vaginal dryness, and may affect other organs of the body, including the kidneys, blood vessels, lungs, liver, pancreas, and brain. Nine out of ten Sjögren's patients are women and the average age of onset is late 40s, although Sjögren's occurs in all age groups in both women and men. It is estimated to strike as many as 4 million people in the United States alone making it the second most common autoimmune rheumatic disease. ...