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Common Diseases and Conditions That Begin With Letter “S”

Written by on September 10, 2011 in Diseases & Issues, Health -
Common Diseases and Conditions That Begin With Letter S

Here is the list of the diseases beginning with letter “S“:

Salmonellosis is an infection with Salmonella bacteria. Most people infected with Salmonella develop diarrhea, fever, vomiting, and abdominal cramps 12 to 72 hours after infection. In most cases, the illness lasts 4 to 7 days and most people recover without treatment. However, in some cases the diarrhea may be so severe that the patient becomes dangerously dehydrated and must be taken to a hospital. At the hospital, the patient may receive intravenous fluids to treat the dehydration, and may be given medications to provide symptomatic relief, such as fever reduction. In severe cases, the Salmonella infection may spread from the intestines to the blood stream, and then to other body sites, and can cause death unless the person is treated promptly with antibiotics. The elderly, infants, and those with impaired immune systems are more likely to develop severe illness. Some people afflicted with salmonellosis later experience reactive arthritis, which can have long-lasting, disabling effects. There are different kinds of Salmonella, including Salmonella bongori and Salmonella enterica.

Sandhoff disease also known as Hexosaminidase A and B deficiency, is an autosomal recessive, genetic, lipid storage disorder. An autosomal recessive disease is one passed down from two carrier parents to their offspring. The disease causes a lysosomal storage disorder where the patient has the inability to create the beta-hexosaminidase A and beta-hexosaminidase B, which is an enzyme that leads to a build-up of GM2 gangliosides in tissues of the body. This build-up is toxic at high levels, which leads to a progressive destruction of the central nervous system, damages the tissues and eventually leads to death. There are three subsets of the disease based on when the patient shows symptoms: classic infantile, juvenile and adult late onset.
Sandhoff disease symptoms are clinically indeterminable from Tay-Sachs Disease. The classic infantile form of the disease has the most severe symptoms and is incredibly hard to diagnose at this early age. The first signs of symptoms begin before 6 months of age and the parents’ notice when the child begins digressing in their development. If the children had the ability to sit up by themselves or crawl they will lose this ability. This is caused by a slow deterioration of the muscles in the child’s body from the buildup of GM2 gangliosides. Since the body is unable to create the enzymes it needs within the central nervous system it is unable to attach to these gangliosides to break them apart and make them non-toxic. With this buildup there are several symptoms that begin to appear such as muscle/motor weakness, sharp reaction to loud noises, blindness, deafness, inability to react to stimulants, respiratory problems and infections, mental retardation, seizures, cherry red spots in the retina, enlarged liver and spleen (hepatosplenomegaly), pneumonia, or bronchopneumonia.
Currently Sandhoff disease does not have any standard treatment and does not have a cure. However, a person suffering from the disease needs proper nutrition, hydration, and maintenance of clear airways. To reduce some symptoms that may occur with Sandhoff disease, the patient may take anticonvulsants to manage seizures or medications to treat respiratory infections, and consume a precise diet consisting of puree foods due to difficulties swallowing. Infants with the disease usually die by the age of 3 due to respiratory infections. The patient must be under constant surveillance because they can suffer from aspiration or lack the ability to change from the passage way to their lungs versus their stomach and their spit travels to the lungs causing bronchopneumonia. The patient also lacks the ability to cough and therefore must undergo a treatment to shake up their body to remove the mucus from the lining of their lungs.

SAPHO syndrome includes a variety of inflammatory bone disorders that may be associated with skin changes. These diseases share some clinical, radiologic, and pathologic characteristics. An entity initially known as Chronic recurrent multifocal osteomyelitis (CRMO) was first described in 1972. Subsequently, in 1978, several cases of CRMO were associated with blisters on the palms and soles (palmoplantar pustulosis). Since then, a number of associations between skin conditions and osteoarticular disorders have been reported under a variety of names, including sternocostoclavicular hyperostosis, pustulotic arthro-osteitis, and acne-associated spondyloarthropathy. The term SAPHO was coined in 1987 to represent this spectrum of inflammatory bone disorders that may or may not be associated with dermatologic pathology.
Bisphosphonate therapy has been suggested as a first-line therapeutic option in many case reports and series. Treatment with tumor necrosis factor alpha antagonists (TNF inhibitors) have been tried in few patients with limited success. Other drugs which are used in psoriatic arthritis, to which SAPHO syndrome is closely related, have also been used in this condition. They include NSAIDs, corticosteroids, sulfasalazine, methotrexate, ciclosporin and leflunomide.
Some patients have responded to antibiotics. The rationale for their use is that Propionibacterium acnes, a bacterium known for its role in acne, has been isolated from bone biopsies of SAPHO patients.

Sarcoidosis, also called sarcoid, Besnier-Boeck disease or Besnier-Boeck-Schaumann disease, is a disease in which abnormal collections of chronic inflammatory cells (granulomas) form as nodules in multiple organs. The cause of sarcoidosis is unknown. Granulomas most often appear in the lungs or the lymph nodes, but virtually any organ can be affected. Normally the onset is gradual. Sarcoidosis may be asymptomatic or chronic. It commonly improves or clears up spontaneously. More than 2/3 of people with lung sarcoidosis have no symptoms after 9 years. About 50% have relapses. About 10% develop serious disability. Lung scarring or infection may lead to respiratory failure and death.
Between 30 and 70% of patients do not require therapy. Corticosteroids, most commonly prednisolone, have been the standard treatment for many years. In some patients, this treatment can slow or reverse the course of the disease, but other patients do not respond to steroid therapy. The use of corticosteroids in mild disease is controversial because in many cases the disease remits spontaneously. Additionally, corticosteroids have many recognized dose- and duration-related side effects, and their use is generally limited to severe, progressive, or organ-threatening disease. The influence of corticosteroids or other immunosuppressants on the natural history is unclear.

Scabies, known colloquially as the seven-year itch, is a contagious skin infection that occurs among humans and other animals. It is caused by a tiny and usually not directly visible parasite, the mite Sarcoptes scabiei, which burrows under the host’s skin, causing intense allergic itching. The infection in animals (caused by different but related mite species) is called sarcoptic mange.
The disease may be transmitted from objects but is most often transmitted by direct skin-to-skin contact, with a higher risk with prolonged contact. Initial infections require four to six weeks to become symptomatic. Reinfection, however, may manifest symptoms within as little as 24 hours. Because the symptoms are allergic, their delay in onset is often mirrored by a significant delay in relief after the parasites have been eradicated. Crusted scabies, formerly known as Norwegian scabies, is a more severe form of the infection often associated with immunosuppression.
The disease can be effectively treated with a number of medications. Permethrin cream is the most effective, but expensive compared to other treatments. Crotamiton is less effective, but also nontoxic and soothing. Ivermectin may be used orally and topically. Treatment with lindane preparations has fallen out of favor due to high toxicity and parasite resistance. In order to prevent re-infection, the host’s contacts are also often treated.
The characteristic symptoms of a scabies infection include intense itching and superficial burrows. The burrow tracks are often linear, to the point that a neat “line” of four or more closely-placed and equally-developed mosquito-like “bites,” is almost diagnostic of the disease.

Scarlet fever is a disease caused by exotoxin released by Streptococcus pyogenes. Once a major cause of death, it is now effectively treated with antibiotics. The term scarlatina may be used interchangeably with scarlet fever, though it is commonly used to indicate the less acute form of scarlet fever that is often seen since the beginning of the twentieth century. It is characterized by: sore throat, fever, bright red tongue with a “strawberry” appearance.
Diagnosis of scarlet fever is clinical. The blood test shows marked leukocytosis with neutrophilia and conservated or increased eosinophils, high erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) (both indications of inflammation), and elevation of antistreptolysin O titer. Blood culture is rarely positive, but the streptococci can usually be demonstrated in throat culture. The complications of scarlet fever include septic complications due to spread of streptococcus in blood and immune-mediated complications due to an aberrant immune response.
Other than the occurrence of the diarrhea, the treatment and course of scarlet fever are no different from those of any strep throat. In case of penicillin allergy, clindamycin or erythromycin can be used with success. Patients should no longer be infectious after taking antibiotics for 24 hours. People who have been exposed to scarlet fever should be watched carefully for a full week for symptoms, especially if aged 3 to young adult. It is very important to be tested (throat culture) and if positive, seek treatment.

Schistosomiasis (also known as snail fever) is a parasitic disease caused by several species of trematodes (platyhelminth infection, or “flukes”), a parasitic worm of the genus Schistosoma.
This disease is most commonly found in Asia, Africa, and South America, especially in areas where the water contains numerous freshwater snails, which may carry the parasite.
The disease affects many people in developing countries, particularly children who may acquire the disease by swimming or playing in infected water.
Schistosomiasis is readily treated using a single oral dose of the drug praziquantel annually. As with other major parasitic diseases, there is ongoing and extensive research into developing a schistosomiasis vaccine that will prevent the parasite from completing its life cycle in humans. In 2009, Eurogentec Biologics developed a vaccine against bilharziosis in partnership with INSERM and researchers from the Pasteur Institute.

Genetics, early environment, neurobiology, and psychological and social processes appear to be important contributory factors; some recreational and prescription drugs appear to cause or worsen symptoms. Current research is focused on the role of neurobiology, although no single isolated organic cause has been found. The many possible combinations of symptoms have triggered debate about whether the diagnosis represents a single disorder or a number of discrete syndromes. Despite the etymology of the term from the Greek roots skhizein (σχίζειν, “to split”) and phrēn, phren- (φρήν, φρεν-; “mind”), schizophrenia does not imply a “split mind” and it is not the same as dissociative identity disorder—also known as “multiple personality disorder” or “split personality”—a condition with which it is often confused in public perception.


Limited systemic sclerosis/scleroderma involves cutaneous manifestations that mainly affect the hands, arms and face. Previously called CREST syndrome in reference to the following complications: Calcinosis, Raynaud’s phenomenon, Esophageal dysfunction, Sclerodactyly, and Telangiectasias. Additionally, pulmonary arterial hypertension may occur in up to one third of patients and is the most serious complication for this form of scleroderma.
Diffuse systemic sclerosis/scleroderma
Other forms of scleroderma include systemic sine scleroderma, which lacks skin changes, but has systemic manifestations, and two localized forms which affect the skin, but not the internal organs: morphea, and linear scleroderma.
The prognosis is generally good for limited cutaneous scleroderma patients who escape pulmonary complications, but is worse for those with the diffuse cutaneous disease, particularly in older age, and for males. Death occurs most often from pulmonary, heart and kidney complications. In diffuse cutaneous disease, five-year survival is 70%, 10-year survival is 55%.

Scurvy was at one time common among sailors, pirates and others aboard ships at sea longer than perishable fruits and vegetables could be stored (subsisting instead only on cured and salted meats and dried grains) and by soldiers similarly separated from these foods for extended periods. It was described by Hippocrates (c. 460 BC–c. 380 BC), and herbal cures for scurvy have been known in many native cultures since prehistory. Scurvy was one of the limiting factors of marine travel, often killing large numbers of the passengers and crew on long-distance voyages. This became a significant issue in Europe from the beginning of the modern era in the Age of Discovery in the 15th century, continuing to play a significant role through World War I in the 20th century.
Today scurvy is known to be caused by a nutritional deficiency, but until the isolation of vitamin C and its direct link to scurvy in 1932, numerous theories and treatments were proposed, often on little or no experimental data. This inconsistency is attributed to the lack of vitamin C as a distinct concept, the varying vitamin C content of different foods (notably present in fresh citrus, watercress, and organ meat), and how vitamin C can be destroyed by exposure to air and copper.

Scoliosis is a medical condition in which a person’s spine is curved from side to side. Although it is a complex three-dimensional deformity, on an X-ray, viewed from the rear, the spine of an individual with scoliosis may look more like an “S” or a “C” than a straight line. Scoliosis is typically classified as either congenital (caused by vertebral anomalies present at birth), idiopathic (cause unknown, subclassified as infantile, juvenile, adolescent, or adult, according to when onset occurred), or neuromuscular (having developed as a secondary symptom of another condition, such as spina bifida, cerebral palsy, spinal muscular atrophy, or physical trauma). This condition affects approximately 7 million people in the United States. Patients having reached skeletal maturity are less likely to have a worsening case. Some severe cases of scoliosis can lead to diminishing lung capacity, putting pressure on the heart, and restricting physical activities.

Selective mutism (SM) is an anxiety disorder in which a person, most often a child, who is normally capable of speech is unable to speak in given situations, or to specific people. Selective mutism often co-exists with shyness or (often severe) social anxiety. Children and adults with selective mutism are fully capable of speech and understanding language, but can fail to speak in certain social situations when it is expected of them. The behaviour may be perceived as shyness by others, and can be linked to social anxiety. A child with selective mutism may be completely silent at school for years but speak quite freely or even excessively at home. There appears to be a hierarchical variation among those suffering from this disorder in that some children participate fully in school and appear social but don’t speak, others will speak only to peers but not to adults, others will speak only to adults when asked questions requiring short answers but not to peers in social situations, and still others speak to no one and participate in few, if any, activities presented to them. In its most severe form known as “progressive mutism”, the disorder progresses until the child no longer speaks to anyone at all, not even to close family members.

Seminoma (also known as pure seminoma or classical seminoma) is a germ cell tumor (cancer) of the testis. It is one of the most treatable and curable cancers, with survival >95% in the early stages. Treatment usually requires removal of one testis, but this does not affect fertility or other sexual functioning.
Seminoma originates in the germinal epithelium of the seminiferous tubules. About half of germ cell tumors of the testis are seminomas. The average age of diagnosis is 40 years. This is about 5 to 10 years older than men with other germ cell tumors of the testes. In most cases, they produce masses that are readily felt on testicular self-examination; however, in up to 11 percent of cases, there may be no mass able to be felt, or there may be testicular atrophy. Testicular pain is reported in up to one fifth of cases. Low back pain may occur after metastasis to the retroperitoneum.


The symptoms of short bowel syndrome can include: Abdominal pain, Diarrhea and steatorrhea (oily or sticky stool, which can be malodorous), fluid retention, weight loss and malnutrition, fatigue.
Patients with short bowel syndrome may have complications caused by malabsorption of vitamins and minerals, such as deficiencies in vitamins A, D, E, K, and B12, calcium, magnesium, iron, folic acid, and zinc. These may appear as anemia, hyperkeratosis (scaling of the skin), easy bruising, muscle spasms, poor blood clotting, and bone pain.
There is no cure for short bowel syndrome. In newborn infants, the 4-year survival rate on parenteral nutrition is approximately 70%. In newborn infants with less than 10% of expected intestinal length, 5 year survival is approximately 20%. Some studies suggest that much of the mortality is due to a complication of the TPN, especially chronic liver disease. Much hope is vested in Omegaven, a type of lipid TPN feed, in which recent case reports suggest the risk of liver disease is much lower.

Sickle-cell anaemia is the name of a specific form of sickle-cell disease in which there is homozygosity for the mutation that causes HbS. Sickle-cell anaemia is also referred to as “HbSS”, “SS disease”, “haemoglobin S” or permutations thereof. In heterozygous people, who have only one sickle gene and one normal adult haemoglobin gene, it is referred to as “HbAS” or “sickle cell trait”. Other, rarer forms of sickle-cell disease include sickle-haemoglobin C disease (HbSC), sickle beta-plus-thalassaemia (HbS/β+) and sickle beta-zero-thalassaemia (HbS/β0). These other forms of sickle-cell disease are compound heterozygous states in which the person has only one copy of the mutation that causes HbS and one copy of another abnormal haemoglobin allele.

Silicosis, also known as Potter’s rot, is a form of occupational lung disease caused by inhalation of crystalline silica dust, and is marked by inflammation and scarring in forms of nodular lesions in the upper lobes of the lungs. It is a type of pneumoconiosis.

Sjögren’s syndrome, also known as “Sicca syndrome”, is a systemic autoimmune disease 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 can exist as a disorder in its own right (primary Sjögren’s syndrome) or may develop years after the onset of an associated rheumatic disorder, such as rheumatoid arthritis, systemic lupus erythematosus, scleroderma, primary biliary cirrhosis etc. (secondary Sjögren’s syndrome)

Smallpox is an infectious disease unique to humans, caused by either of two virus variants, Variola major and Variola minor.The disease is also known by the Latin names Variola or Variola vera, which is a derivative of the Latin varius, meaning “spotted”, or varus, meaning “pimple”. The term “smallpox” was first used in Europe in the 15th century to distinguish variola from the “great pox” (syphilis).Smallpox localizes in small blood vessels of the skin and in the mouth and throat. In the skin, this results in a characteristic maculopapular rash, and later, raised fluid-filled blisters. V. major produces a more serious disease and has an overall mortality rate of 30–35%. V. minor causes a milder form of disease (also known as alastrim, cottonpox, milkpox, whitepox, and Cuban itch) which kills about 1% of its victims. Long-term complications of V. major infection include characteristic scars, commonly on the face, which occur in 65–85% of survivors. Blindness resulting from corneal ulceration and scarring, and limb deformities due to arthritis and osteomyelitis are less common complications, seen in about 2–5% of cases.
Smallpox is believed to have emerged in human populations about 10,000 BC. The earliest physical evidence of smallpox is probably the pustular rash on the mummified body of Pharaoh Ramses V of Egypt. The disease killed an estimated 400,000 Europeans per year during the closing years of the 18th century (including five reigning monarchs), and was responsible for a third of all blindness.Of all those infected, 20–60%—and over 80% of infected children—died from the disease. Smallpox was responsible for an estimated 300–500 million deaths during the 20th century. As recently as 1967, the World Health Organization (WHO) estimated that 15 million people contracted the disease and that two million died in that year.After vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the eradication of smallpox in 1979. Smallpox is one of the two infectious diseases to have been eradicated, the other being rinderpest, which was declared eradicated in 2011.

Spasmodic dysphonia (or laryngeal dystonia) is a voice disorder characterized by involuntary movements of one or more muscles of the larynx (vocal folds or voice box) during speech. The exact cause of spasmodic dysphonia (SD) is unknown. According to the National Institute on Deafness and Other Communication Disorders “research has revealed increasing evidence that most cases of spasmodic dysphonia are in fact neurogenic or having to do with the nervous system (brain and nerves).”
There is no known cure for spasmodic dysphonia.
The most effective treatment for reducing the symptoms of spasmodic dysphonia is injections of very small amounts of botulinum toxin (sold commercially under the brand names Botox, Dysport, and Myobloc) directly into the affected muscles of the larynx. The toxin weakens muscles by blocking the nerve impulse to the muscle. The botulinum toxin injections generally improve the voice for a period of three to four months after which the voice symptoms gradually return. This treatment requires continual injections to maintain a good speaking voice.

Strabismus can be either a disorder of the brain in coordinating the eyes, or of one or more of the relevant muscles’ power or direction of motion. Difficult strabismus problems are usually co-managed between orthoptists and ophthalmologists.
Whereas amblyopia (lazy eye), if minor and detected early, can often be corrected with use of an eyepatch on the dominant eye and/or vision therapy, the use of eyepatches is unlikely to change the angle of strabismus. Advanced strabismus is usually treated with a combination of eyeglasses or prisms, vision therapy, and surgery, depending on the underlying reason for the misalignment. Surgery does not change the vision; it attempts to align the eyes by shortening, lengthening, or changing the position of one or more of the extraocular eye muscles and is frequently the only way to achieve cosmetic improvement. The procedure can typically be performed in about an hour, and requires about a week for recovery. Double vision can result, and occasionally vision loss can occur. Glasses affect the position by changing the person’s reaction to focusing. Prisms change the way light, and therefore images, strike the eye, simulating a change in the eye position.


In one common form of synesthesia, known as grapheme → color synesthesia or color-graphemic synesthesia, letters or numbers are perceived as inherently colored, while in ordinal linguistic personification, numbers, days of the week and months of the year evoke personalities. In spatial-sequence, or number form synesthesia, numbers, months of the year, and/or days of the week elicit precise locations in space (for example, 1980 may be “farther away” than 1990), or may have a (three-dimensional) view of a year as a map (clockwise or counterclockwise). Yet another recently identified type, visual motion → sound synesthesia, involves hearing sounds in response to visual motion and flicker. Over 60 types of synesthesia have been reported, but only a fraction have been evaluated by scientific research. Even within one type, synesthetic perceptions vary in intensity and people vary in awareness of their synesthetic perceptions.
Synesthetes often report that they were unaware their experiences were unusual until they realized other people did not have them, while others report feeling as if they had been keeping a secret their entire lives, as has been documented in interviews with synesthetes on how they discovered synesthesia in their childhood. The automatic and ineffable nature of a synesthetic experience means that the pairing may not seem out of the ordinary. This involuntary and consistent nature helps define synesthesia as a real experience. Most synesthetes report that their experiences are pleasant or neutral, although, in rare cases, synesthetes report that their experiences can lead to a degree of sensory overload.

Syphilis is a sexually transmitted infection caused by the spirochete bacteria Treponema pallidum subspecies pallidum. The primary route of transmission is through sexual contact however it may also be transmitted from mother to fetus during pregnancy or at birth resulting in congenital syphilis. Other human diseases caused by related Treponema pallidum include yaws (subspecies pertenue), pinta (subspecies carateum) and bejel (subspecies endemicum).
The signs and symptoms of syphilis vary depending in which of the four stages it presents (primary, secondary, latent, and tertiary). The primary stage classically presents with a single chancre (a firm, painless, non-itchy skin ulceration), secondary syphilis with a diffuse rash which frequently involves the palms of the hands and soles of the feet, latent syphilis with little to no symptoms, and tertiary syphilis with gummas, neurological, or cardiac symptoms. It has however been known as “the great imitator” due to its frequent atypical presentations. Diagnosis is usually via blood tests however the bacteria can also be visualized under a microscope. Syphilis can be effectively treated with antibiotics, specifically intramuscular penicillin G and in those who are allergic ceftriaxone is recommended.
Syphilis is believed to have infected 12 million people worldwide in 1999, with greater than 90% of cases in the developing world. After decreasing dramatically since the widespread availability of penicillin in 1940s, rates of infection have increased since the turn of the millennium in many countries often in combination with human immunodeficiency virus (HIV). This has been attributed partly to unsafe sexual practices among men who have sex with men, increased promiscuity, prostitution and decreasing use of barrier protection.

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