Conditions A–Z
Plain-language reference entries for diseases, symptoms and tests.
s
- SACE
- SARS
- SCD
- SCFE
- SGOT
- SGPT
- SIADH
- SIDS
- SMA20
- SMA7
- SMAC20
- SMAC7
- SSPE
- STD and ecological niches
- SVC obstruction
- Sachets
- Sacral dimple
- Saddle nose
- Sadness
- Safe driving for teens
- Safe sex
- Safety
- Safety and vitamins
- Safety checklist
- Saladenitis
- Salads and nutrients
- Salivary duct stones
- Salivary gland biopsy
- Salivary gland disorders
- Salivary gland infections
- Salivary gland tumors
- Salivary-Gland Disorders
- Salivation
- Salk vaccine
- Salmon patch
- Salmonella enterocolitis
- Salmonellosis
- Salpingitis
- Salpingo-oophoritis
- Salpingo-peritonitis
- San Joaquin Valley fever
- Sanfilippo syndrome
- Sanitation - food and hygiene
- Sarcoidosis
- Sarcoidosis - nervous system
- Sarcoma botryoides
- Sarcoptes scabiei
- Sassafras oil overdose
- Saturated fat
- Scabies
- Scalded skin syndrome
- Scales
- Scalp monitoring
- Scalp pH testing
- Scan - carotid duplex
- Scan - lung
- Scan - thyroid
- Scar - hypertrophic
- Scar repair
- Scar revision
- Scarlatina
- Scarlet fever
- Schatzki's ring
- Scheie syndrome
- Scheie syndrome (Mucopolysaccharidosis type I)
- Scheuermann's disease
- Schilling test
- Schirmer's test
- Schistosomiasis
- Schizoaffective disorder
- Schizoid personality disorder
- Schizophrenia
- Schizophrenia - disorganized type
- Schizophrenia - paranoid type
- Schizotypal personality disorder
- School age test or procedure preparation
- School lunch programs
- School-age children development
- Sciatic nerve dysfunction
- Sciatica
- Scintigraphy - bone
- Scintillation
- Sclera
- Scleral buckling
- Scleral injection
- Scleritis
- Scleritis
- Scleroderma
- Scleroderma
- Scleroma
- Sclerosing cholangitis
- Sclerotherapy of veins
- Scoliosis
- Scorbutus
- Scorpion bite
- Scorpion fish
- Scorpions
- Scrape
- Scratch tests - allergy
- Screening for colon cancer
- Scrofula
- Scrotal masses
- Scrotal swelling
- Scrotal trauma
- Scrotal ultrasound
- Scrotum
- Scrotum - empty (anorchia)
- Scrotum - empty (undescended testes)
- Scurvy
- Seasonal affective disorder
- Sebaceous Cysts
- Sebaceous adenoma
- Sebaceous cyst
- Seborrheic Dermatitis (Seborrhea)
- Seborrheic dermatitis
- Seborrheic eczema
- Seborrheic keratosis
- Secobarbital overdose
- Second cranial nerve atrophy
- Second-hand smoke
- Secondary Hypertension
- Secondary amenorrhea
- Secondary aplastic anemia
- Secondary glaucoma
- Secondary hyperparathyroidism
- Secondary hypogonadism
- Secondary infections
- Secondary parkinsonism
- Secondary peritonitis
- Secondary syphilis
- Secondary systemic amyloid
- Secretin stimulation test
- Secretory otitis media
- Sed rate
- Sedimentation rate
- Segmental glomerulosclerosis
- Seizure - absence
- Seizure - complex
- Seizure - fever induced
- Seizure - first aid
- Seizure - generalized
- Seizure - grand mal
- Seizure - partial (focal)
- Seizure - petit mal
- Seizure - temporal lobe
- Seizure - tonic-clonic
- Seizure disorder
- Seizures
- Selective deficiency of IgA
- Selective mutism
- Selenium in diet
- Self-catheterization
- Semen - bloody
- Semen analysis
- Semi-vegetarian
- Seminoma
- Senile angioma
- Senile cerebral amyloid angiopathy
- Senile dementia/Alzheimer's type (SDAT)
- Senile lentigines
- Senile macular degeneration (SMD)
- Senior-Loken syndrome
- Sensitivity analysis
- Sensitivity to heat
- Sensitivity to sunlight
- Sensitivity to the cold
- Sensorimotor polyneuropathy
- Sensorineural deafness
- Sensory hallucinations
- Sensory loss
- Separation anxiety
- Separation of the sutures
- Sepsis
- Sepsis of the newborn
- Septal hematoma
- Septic shock
- Septicemia
- Septoplasty
- Sequential multi-channel analysis with computer-20
- Sequential multi-channel analysis with computer-7
- Serial chest X-ray
- Serial histoplasma complement fixation
- Sernyl overdose
- Serologic test for B. anthracis
- Serology
- Serology for Franciscella tularensis
- Serology for brucellosis
- Serology for tularemia
- Serosanguineous
- Serotonin metabolite
- Serous otitis media
- Sertoli-Leydig cell tumor
- Serum DHEA-sulfate
- Serum TBG level
- Serum acid phosphatase
- Serum adrenocorticotropic hormone
- Serum angiotensin-converting enzyme
- Serum antibodies
- Serum calcium
- Serum chemistries
- Serum chloride
- Serum cholinesterase
- Serum cholinesterase
- Serum chromium
- Serum creatinine
- Serum erythropoietin
- Serum factor IX
- Serum fibrinogen
- Serum globulin electrophoresis
- Serum glucose - random
- Serum glutamic-oxaloacetic transaminase
- Serum hemoglobin
- Serum herpes simplex antibodies
- Serum immunoglobulin electrophoresis
- Serum iron
- Serum ketones
- Serum leucine aminopeptidase
- Serum magnesium - test
- Serum myoglobin
- Serum phenylalanine screening
- Serum phosphorus
- Serum progesterone
- Serum serotonin level
- Serum sickness
- Serum sodium
- Serum testosterone
- Serum thyroxine binding globulin
- Serum trypsin
- Serum trypsinogen
- Sestamibi and thallium stress tests
- Setting limits
- Seventh cranial nerve palsy due to birth trauma
- Severe acute respiratory syndrome (SARS)
- Sex - delayed ejaculation
- Sex - orgasmic dysfunction
- Sex and rape
- Sex chromatin test
- Sex cord tumor;
- Sex-linked dominant
- Sex-linked recessive
- Sexual apathy
- Sexual aversion
- Sexual dysfunction - female
- Sexual dysfunction - male
- Sexual education
- Sexual intercourse - painful
- Sexual maturation
- Sexual problems overview
- Shaken baby syndrome
- Shaken impact syndrome
- Shaking palsy
- Shampoo ingestion
- Shaving cream
- Sheehan's syndrome
- Shellac
- Shellfish
- Shigella enteritis
- Shigella gastroenteritis
- Shigellosis
- Shigellosis
- Shin splints
- Shingles
- Shingles (Herpes Zoster)
- Shingles (Herpes Zoster)
- Shivering
- Shock
- Shock - anaphylactic
- Shock - cardiogenic
- Shock - hypovolemic
- Shock liver
- Shock lung
- Shock treatment
- Shock wave lithotripsy
- Short bones
- Short bowel syndrome
- Short philtrum
- Short stature
- Shortness of breath
- Shortsightedness
- Shoulder Dislocation
- Shoulder arthroscopy
- Shoulder impingement syndrome
- Shoulder pain
- Shoulder-hand syndrome
- Shunt - ventriculoperitoneal
- Shy-Drager syndrome
- Shy-McGee-Drager syndrome
- Sialogram
- Sialography
- Sialolithiasis
- Sibilant rhonchi
- Sick sinus syndrome
- Sickle cell anemia
- Sickle cell disease
- Sickle cell test
- Sickledex
- Sickness and chicken soup
- Side pain
- Sideropenic dysphagia
- Sigmoidoscopy
- Sigmoidoscopy
- Silent ear infection
- Silent otitis media
- Silicoproteinosis
- Silicosis
- Silicosis - acute
- Silver syndrome
- Silver-Russell syndrome
- Simian crease
- Simple carbohydrates
- Simple pulmonary eosinophilia (Loeffler's syndrome)
- Simple seizure
- Sinequan
- Singapore hemorrhagic fever
- Single palmar crease
- Singultus
- Sinus infection
- Sinuses X-ray
- Sinusitis
- Sinusitis - acute
- Sinusitis - chronic
- Siphonaptera
- Sipple's syndrome
- Sitz bath
- Sjogren syndrome
- Skeletal limb abnormalities
- Skeletal survey
- Skin - abnormally dark or light
- Skin - clammy
- Skin - dry
- Skin - oily
- Skin abscess
- Skin autografting
- Skin biopsy Gram stain
- Skin blushing/flushing
- Skin bumps - acne-like
- Skin cancer
- Skin cancer - melanoma
- Skin cancer and fair skinned people
- Skin cancer locations
- Skin care and incontinence
- Skin characteristics in newborns
- Skin color - patchy
- Skin discoloration - bluish
- Skin graft
- Skin growths - fatty
- Skin hemorrhages
- Skin infection - bacterial
- Skin infection - fungal
- Skin infection - staphylococcal
- Skin infection - yeast
- Skin irritation from rubbing
- Skin lesion
- Skin lesion Gram stain
- Skin lesion KOH exam
- Skin lesion aspiration
- Skin lesion biopsy
- Skin lesion of Histoplasmosis
- Skin lesion of blastomycosis
- Skin lesion of coccidioidomycosis
- Skin lumps
- Skin lumps - concerns
- Skin or mucosal biopsy culture
- Skin pale or gray
- Skin pigment
- Skin rash
- Skin redness or inflammation
- Skin sagging treatment
- Skin self-exam
- Skin smoothing surgery
- Skin spots - aging
- Skin tags
- Skin test anergy
- Skin transplant
- Skin turgor
- Skull X-ray
- Skull fracture
- Skull radiography
- Slapped cheek
- Sleep - natural short sleeper
- Sleep apnea
- Sleep apnea - central
- Sleep apnea linked heartbeat irregularities
- Sleep apnea syndrome
- Sleep disorders
- Sleep disorders in the elderly
- Sleep issues
- Sleep paralysis - isolated
- Sleep studies
- Sleep terror disorder
- Sleep walking
- Sleep-wake syndrome - irregular
- Sleepiness - during the day
- Sleeping difficulty
- Sleeping sickness
- Sleeplessness
- Sleepwalking and children
- Sling - instructions
- Slip
- Slipped capital femoral epiphysis
- Slit-lamp exam
- Slow involuntary movements of large muscle groups
- Slow rate of growth
- Slurred speech
- Small bowel biopsy
- Small bowel enema
- Small bowel resection
- Small bowel tissue biopsy smear
- Small for gestational age (SGA)
- Small intestinal aspirate and culture
- Small intestine insufficiency
- Small intestine surgery
- Small-Cell Lung Cancer
- Smallpox
- Smashed fingers
- Smear of duodenal fluid aspirate
- Smell - impaired
- Smokeless snuff
- Smoker's keratosis
- Smoking - tips on how to quit
- Smoking and smokeless tobacco
- Smoking cessation
- Smoking hazards
- Snake bite
- Snake bite poison
- Sneezing
- Snoring
- Soap ingestion
- Social Anxiety Disorder
- Social phobia
- Sociopathic personality
- Sodium - serum
- Sodium - urine
- Sodium bisulfate
- Sodium borate overdose
- Sodium carbonate
- Sodium hydroxide
- Sodium hypochlorite
- Sodium in diet
- Sodium phosphate overdose
- Sodium salicylate overdose
- Sodoku
- Soft spot - large
- Soft spot - sunken
- Soft tissue gangrene
- Soft tissue sarcoma
- Soft-Tissue Sarcoma
- Soiling
- Solanum tuberosum
- Solar Lentigo, Liver Spots
- Solar keratosis
- Solder
- Solitary pulmonary nodule
- Soluble vs. insoluble fiber
- Somatization disorder
- Somatoform pain disorder
- Somatotroph adenoma
- Somnambulism
- Somnolence
- Sonogram
- Sorbic acid overdose
- Sore throat
- Sores on the female genitals
- Sores or ulcers on the male genitals
- Soy
- Spasm of the esophagus
- Spasmodic bladder
- Spasmodic croup
- Spasmodic dysphonia
- Spasms of the hands or feet
- Spasmus nutans
- Spastic colon
- Spasticity
- Special medical power of attorney
- Specks in the eye
- Speech disorders
- Speech impairment (adult)
- Sperm count
- Spermatocele
- Spherocytosis
- Sphingomyelinase deficiency (type A Niemann-Pick disease)
- Spider Veins
- Spider angioma
- Spider bite
- Spider fingers
- Spina Bifida
- Spina bifida
- Spina bifida repair
- Spinal CT
- Spinal abscess
- Spinal cord abscess
- Spinal cord abscess
- Spinal cord compression or injury
- Spinal cord scan
- Spinal cord trauma
- Spinal curvature
- Spinal fluid coccidioides antibody test
- Spinal fluid culture
- Spinal fluid smear
- Spinal fluid specimen
- Spinal fusion
- Spinal muscular atrophy
- Spinal stenosis
- Spinal surgery - cervical
- Spinal surgery - lumbar
- Spinal tap
- Spinal tumor
- Spinal-Cord Trauma
- Spinal/neck injury
- Spine MRI
- Spinocerebellar degeneration
- Spirillary fever
- Spirogram
- Spirometry
- Spitting up
- Spleen enlargement
- Spleen removal
- Splenectomy
- Splenectomy - post-surgery syndrome
- Splenic infarction
- Splenomegalic polycythemia
- Splenomegaly
- Splint - instructions
- Splinter hemorrhages
- Splinter removal
- Spondylarthropathy
- Spondylitis
- Spondylolisthesis
- Spondylolisthesis
- Spongy degeneration of the brain
- Spontaneous abortion
- Spontaneous bacterial peritonitis (SBP)
- Spontaneous pneumothorax
- Sporadic primary pulmonary hypertension
- Spores
- Sporotrichosis
- Sports cream overdose
- Spotted fever
- Spotting
- Sprains
- Sprue
- Sputum DFA (direct fluorescent antibody)
- Sputum Gram stain
- Sputum culture
- Sputum smear (KOH test)
- Sputum stain for mycobacteria
- Squamous Cell Carcinoma of the Skin
- Squamous cell cancer
- Squamous cell cancer - mouth
- Squamous cell cancer - penis
- Squamous cell hyperplasia
- Squamous-Cell Carcinoma Of The Lung
- Squint
- St. Vitus dance
- Stage 1 Lyme disease
- Stage 3 Lyme disease
- Standard ophthalmic exam
- Staph aureus food poisoning
- Staphylococcal meningitis
- Staphylococcal scalded skin syndrome (SSS)
- Staphylococcal toxic shock syndrome
- Starch ingestion
- Starches
- Startle reflex
- Startle response
- Stasis dermatitis and ulcers
- Stasis syndrome
- Steam iron cleaner
- Steely hair disease
- Stein-Leventhal syndrome
- Stellachrome
- Stem cell research
- Stenosis - renal artery
- Stent
- Stereotypic movement disorder
- Sterile meningitis
- Sterilization surgery - female
- Sterilization surgery - male
- Sterilization surgery -- making a decision
- Sternal tap
- Sternutation
- Stevens-Johnson syndrome
- Stiff heart syndrome
- Stiff lung
- Stiffness in a joint
- Still's disease
- Stillbirth
- Stimulants
- Stimulus
- Stingray
- Stoddard solvent
- Stomach Cancer
- Stomach acid test
- Stomach cancer
- Stomach pain
- Stomach pumping
- Stomach tube insertion
- Stomach ulcer
- Stomach upset
- Stomachache
- Stomatitis - herpetic
- Stomatitis - ulcerative
- Stonefish
- Stones - bladder
- Stones - cystine
- Stones - kidney
- Stool - trypsin and chymotrypsin
- Stool C. difficile toxin
- Stool Gram stain
- Stool culture
- Stool guaiac test
- Stool occult blood test
- Stool occult blood test - flushable home test
- Stool occult blood test - guaiac smear
- Stool ova and parasites exam
- Stool smear
- Stools - black or tarry
- Stools - floating
- Stools - foul smelling
- Stools - pale or clay colored
- Stools - watery
- Storing medicine safely
- Stork bite
- Strabismus
- Strabismus repair
- Straddle injury
- Strains
- Stratigraphy
- Strawberry nevus
- Streeter's dysplasia
- Strep throat
- Streptobacillary fever
- Streptobacillosis
- Streptococcal pharyngitis
- Streptococcal proctitis
- Streptococcal screen
- Streptococcus agalactiae
- Stress ECG
- Stress Echocardiography
- Stress and anxiety
- Stress and anxiety
- Stress and illness rising in UK workplaces
- Stress gastritis
- Stress in childhood
- Stress incontinence
- Stress management
- Stress reduction and exercise
- Stress test - echocardiography
- Stress test - exercise treadmill
- Stress vs. anxiety
- Stress: symptoms and treatment
- Stretch marks
- Striae
- Striae atrophica
- Striae distensae
- Stridor
- String test
- Stroke
- Stroke secondary to FMD
- Stroke secondary to atherosclerosis
- Stroke secondary to atrial fibrillation
- Stroke secondary to cardiogenic embolism
- Stroke secondary to carotid dissection
- Stroke secondary to carotid stenosis
- Stroke secondary to cocaine
- Stroke secondary to syphilis
- Stroke: What is a stroke?
- Stromal tumor
- Strongyloidiasis
- Struma lymphomatosa
- Stuart-Prower deficiency
- Stuffy nose
- Stuporous
- Sturge-Weber syndrome
- Stuttering
- Stuttering and children
- Stuttgart disease
- Styes And Chalazions
- Subacute combined degeneration
- Subacute combined degeneration of the spinal cord
- Subacute lymphocytic thyroiditis
- Subacute sclerosing leukoencephalitis
- Subacute sclerosing panencephalitis
- Subacute thyroiditis
- Subarachnoid Hemorrhage
- Subarachnoid hemorrhage
- Subareolar abscess
- Subclavian artery occlusive syndrome
- Subclavian steal syndrome
- Subconjunctival hemorrhage
- Subcutaneous
- Subcutaneous abscess
- Subcutaneous air
- Subcutaneous emphysema
- Subdural Hematoma
- Subdural effusion
- Subdural hematoma
- Subdural hematoma - chronic
- Subdural hemorrhage
- Subdural hemorrhage - chronic
- Sublingual space infection
- Submandibular space infection
- Substance Abuse (Depressants)
- Substance abuse
- Substance abuse recovery and diet
- Substernal thyroid
- Subungual warts
- Sucrose hemolysis test
- Suction curettage
- Sudden infant death syndrome
- Sudeck's atrophy
- Sugar-water hemolysis test
- Suicide and suicidal behavior
- Sulfhemoglobin
- Sulfites
- Sulfuric acid
- Sulindac overdose
- Sun-Damaged Skin
- Sun-Damaged Skin - Wrinkles
- Sun-induced skin changes - keratosis
- Sun-induced skin changes - liver spots
- Sunburn
- Sunburn first aid
- Sunken fontanelles
- Sunscreen ingestion
- Super Glue
- Superficial thrombophlebitis
- Superior vena cava obstruction
- Superior vena cava syndrome
- Supernumerary digits
- Supernumerary nipples
- Supraglottitis
- Supranuclear ophthalmoplegia
- Suprapubic catheters
- Suprapubic prostatectomy
- Supraventricular tachycardia
- Surface echo
- Surgeries for female stress incontinence
- Surgery using laser
- Surgical abortion
- Surgical excision
- Sutures - cranial
- Sutures - ridged
- Sutures - separated
- Swab for Staph carriage
- Swab for respiratory viruses
- Swallowed Object
- Swallowing difficulty
- Swallowing or inhaling a foreign object
- Swallowing pain or burning
- Swan-Ganz - right heart catheterization
- Swayback
- Sweat - cold
- Sweat chloride
- Sweat electrolytes
- Sweat test
- Sweating - absent
- Sweating - excessive
- Sweeteners
- Swelling
- Swelling - eyes
- Swelling in the abdomen
- Swelling of a joint
- Swelling of the ankles - feet - legs
- Swelling of the face
- Swelling of the scrotum
- Swimmer's Ear (Otitis Externa)
- Swimmer's ear
- Swimmer's ear - chronic
- Swimmer's shoulder
- Swimming pool cleaners
- Swimming pool granuloma
- Swineherd's disease
- Swollen belly
- Swollen eye or conjunctiva
- Swollen glands
- Swollen gums
- Swollen lymph nodes
- Sydenham chorea
- Sympathomimetic intoxication
- Symptomatic
- Syncope
- Syndactyly
- Syndactyly repair
- Syndrome of inappropriate antidiuretic hormone secretion
- Synovectomy
- Synovial biopsy
- Synovial fluid analysis
- Synovitis - toxic
- Syphilis
- Syphilis - primary
- Syphilis - secondary
- Syphilis - tertiary
- Syphilitic aneurysm
- Syphilitic aseptic meningitis
- Syphilitic myelopathy
- Syphilitic stroke
- Syringomyelia
- Syrinx
- Systemic
- Systemic Lupus Erythematosus (Lupus)
- Systemic coccidioidomycosis
- Systemic histoplasmosis
- Systemic lupus erythematosus
- Systemic sclerosis (scleroderma)
- Systolic blood pressure