| Topics![[file]](images/m/file.gif) Saccharomyces cerevisiae, antibodies to  - Saccharopinuria
- Sacral nerve stimulation
- Sacrum, abscess of
- S-Adenosyl-l-methionine
- Sadism
- Safe sex
- Salaam seizures (infantile spasms)
- Salem sump tube
![[expand]](./images/m/index_expand.gif) Salicylates- Salicylic acid
- Salicylism
- Saline
- Saline wet mount
- Salivary glands
- Salmeterol
- Salmon calcitonin
- Salmonella infection
- Salpingectomy
- Salpingitis
- Salpingo-oophorectomy
- Salpingo-oophoritis, tuberculous
- Salsalate
- Salter-Harris classification
- SAMe (S-adenosyl-l-methionine)
- Sand fly bites
- Sandfly fever
- Sandhoff's disease
- Sanfilippo's syndrome
- San Joaquin fever
- Santavuori-Haltia disease
- Saposin B deficiency
- Saposin C deficiency
- Saquinavir
- Sarcoidosis
- Sarcoma
- Sarcoma botryoides
- Sarcopenia
- Sarcosinemia
- Sarin poisoning
- SARS (severe acute respiratory syndrome)
- Saturday night palsy
- Sauna taker's lung
- Sausage worker's lung
- Saw palmetto
- Saxitoxin
- Scabies
- Scabs (crusts)
- Scales
- Scalp
- Scans (see Computed tomography; Magnetic resonance imaging; Positron emission tomography; Ultrasonography)
- Scaphoid bone fracture
- Scar(s)
- Scarlet fever
- Scedosporium infection
- Schatzki's ring
- Scheie's syndrome
- Scheuermann's disease
- Schilling test
- Schindler's disease
- Schirmer's test
- Schirmer test
- Schistocytes
- Schistosomiasis
- Schizencephaly
- Schizoaffective disorder
- Schizoid personality disorder
- Schizophrenia
- Schizophreniform disorder
- Schizotypal personality disorder
- Schmidt's syndrome
- School, avoidance of
- School refusal
- Schwannoma
- Sciatica
- Sciatic nerve, compression of (piriformis syndrome)
- SCIWORA (spinal cord Injury without evidence of radiologic abnormality)
- SCL-70 antibodies
- Sclera
- Scleritis
- Scleroderma (see Systemic sclerosis)
- Sclerosing cholangitis
- Sclerosis
- Sclerostenosis
- Sclerotherapy, in varicose veins
- Scoliosis
- Scombroid poisoning
- Scopolamine
- Scorpion stings
- Scotomata
- Scratch dermatitis
- Scratching (see Pruritus)
- Screening tests
- Scrotum
- Scrub typhus
- Scurvy
- Sea anemone sting
- Seabather's eruption
- Seasonal affective disorder
- Seasonal allergic conjunctivitis
- Seasonal rhinitis
- Sea urchin injury
- Sebaceous cyst
- Sebaceous glands
- Seborrheic blepharitis
- Seborrheic dermatitis
- Seborrheic keratoses
- Secobarbital, poisoning with
- Second impact syndrome
- Second messengers
- Secretin provocative test
- Secretin test
- Sedatives, intracranial pressure and
- Sedatives (hypnotics)
- Seizures
- Selective estrogen receptor modulator
- Selective laser trabeculoplasty (SLT)
- Selective serotonin reuptake inhibitors
- Selegiline
- Selenium
- Self-mutilation
- Self-neglect
- Sella turcica
- Sellick maneuver
- Semantic dementia
- Semen
- Seminoma
- Semont maneuver
- Sengstaken-Blakemore tube
- Senile macular degeneration
- Senile purpura
- Senna
- Sensation
- Sensitivity, of tests
- Sensorineural hearing loss (see Hearing, loss of)
- Sentinel node biopsy
- Seoul virus infection
- Separation anxiety, in infant
- Separation anxiety disorder
- Sepsis
- Septic arthritis (see Arthritis, infectious)
- Septicemia (see Sepsis)
- Septo-optic dysplasia
- Septostomy
- Septum
- Sequoiosis
- Serotonin (5-hydroxytryptamine, 5-HT)
- Serotonin modulators
- Serotonin-norepinephrine reuptake inhibitors
- Serotonin-receptor antagonists
- Serotonin reuptake inhibitors (see Selective serotonin reuptake inhibitors)
- Serotonin syndrome
- Serratia marcescens infection
- Sertoli cells
- Sertraline
- Serum sickness
- Sesamoiditis
- Sestamibi
- Sevelamer
- Sever's disease
- Severe acute respiratory syndrome (SARS)
- Severe combined immunodeficiency
- Severs disease
- Sewer gas poisoning
- Sewer worker's lung
- Sex chromosomes
- Sex hormone-binding globulin
- Sex-limited (sex-influenced) inheritance
- Sex reassignment surgery
- Sexual abuse
- Sexual activity
- Sexual desire/interest disorder
- Sexual development
- Sexual history
- Sexual identity
- Sexually transmitted diseases
- Sezary syndrome
- Shaken baby syndrome
- Shampoo
- Sheehan's syndrome
- Shellfish poisoning
- Shift work sleep disorder
- Shiga toxin
- Shigella infection
- Shigellosis (see Shigella infection)
- Shin, strengthening exercises for
- Shin bone fever
- Shingles
- Shin splints
- Shock
- Shock (electrical)
- Shock (electroconvulsive) therapy
- shock liver
- Shock wave lithotripsy
- Shohl's solution
- Short/medium-chain 3-hydroxyacyl-CoA dehydrogenase deficiency
- Short bowel syndrome
- Short-chain 3-hydroxyacyl-CoA dehydrogenase deficiency
- Short-chain acyl-CoA dehydrogenase deficiency
- Short stature
- Short synacthen test
- Short wave diathermy
- Shoulder
- Shunt
- Shunt hyperbilirubinemia
- Shy-Drager syndrome
- SIADH
- Sialadenitis
- Sialidosis
- Sialography
- Sialolithiasis
- Sialometaplasia, necrotizing
- Sialometry
- Sialuria
- Sibutramine
- Sick building syndrome
- Sickle cell-b-thalassemia disease
- Sickle cell disease
- Sick sinus syndrome
- Sideroblastic anemia
- Sideropenic dysphagia
- SIDS (sudden infant death syndrome)
- Sigmoid
- Sigmoidoscopy
- Signal transduction inhibitors
- Sildenafil
- Silicosis
- Silo filler's disease
- Silver
- Silver nitrate
- Silver salts poisoning
- Silver sulfadiazine
- Silver wiring (retinal)
- Simon foci
- Simvastatin
- Sinbis virus disease
- Sindling-Larsen-Johansson syndrome
- Singing voice
- Single-photon emission computed tomography, in Lewy body dementia
- Single-photon emission computed tomography (SPECT)
- Singultus
- Sin Nombre virus infection
- Sinoatrial exit block
- Sinoatrial node
- Sinus arrest
- Sinus arrhythmia
- Sinus bradycardia
- Sinuses
- Sinus histiocytosis
- Sinusitis
- Sinus node
- Sinusoidal obstruction syndrome
- Sinusotomy
- Sinus pause
- Sinus rhythm
- Sinus tachycardia
- Sipple's syndrome
- Sirolimus
- Sitagliptin
- Sitosterolemia
- SI units
- Sjaastad syndrome
- Sjogren's syndrome
- Sjogren-Larsson syndrome
- Skene's duct, cyst of
- Skene's gland, inflammation of
- Skin
- Skinfold thickness
- Skin graft
- Skin tags
- Skin tests
- Skull fracture
- SLE (see Systemic lupus erythematosus)
- Sleep
- Sleep apnea
- Sleep deprivation
- Sleepiness
- Sleeping sickness
- Sleep latency testing
- Sleep paralysis
- Sleepwalking
- Sling
- Slipped capital femoral epiphysis
- Slit-lamp examination
- Slow virus infection
- SLUDGE syndrome
- Sly's syndrome
- Small-bowel meal
- Small-for-gestational-age infant
- Small intestine
- Small left colon syndrome
- Small-molecule mimetics
- Smallpox
- Smell
- Smith-Magenis syndrome
- Smog
- Smoke inhalation
- Smokeless tobacco lesion
- Smoking (see Cigarette smoking; Tobacco)
- Smoking cessation
- Snakebites
- Sniff test
- Snoring
- Snout reflex
- Snuff taker's lung
- Soaks
- Soapsuds enema
- Social health maintenance organizations (SHMOs)
- Social phobia (social anxiety disorder)
- Social Security
- Sodium
- Sodium arsenate poisoning
- Sodium bicarbonate
- Sodium channel blockers
- Sodium chloride
- Sodium cyanide poisoning
- Sodium fluoride poisoning
- Sodium nitrite poisoning
- Sodium oxybate
- Sodium phosphate
- Sodium polystyrene sulfonate
- Sodium stibogluconate
- Sodium valproate
- Sodoku
- Solar urticaria
- Solder poisoning
- Solifenacin
- Solutions
- Solvents
- Somatization disorder
- Somatoform disorders
- Somatoform pain disorder
- Somatomedin-C (see Insulin-like growth factor 1)
- Somatosensory evoked responses
- Somatostatin
- Somatostatinoma
- Somnambulism
- Somogyi phenomenon
- Sonohysterography
- Sorafenib
- Sorbitol
- Sores
- Sotalol
- South American blastomycosis
- Southeast Asian hemorrhagic fever
- Space adaptation syndrome
- Spanish fly poisoning
- Sparganosis
- Spasm(s), infantile
- Spasmodic torticollis
- Spasms
- Spastic colon
- Spasticity
- Spastic paraparesis
- Special K (ketamine)
- Specific gravity, urinary
- Specificity, of tests
- Spectacle blur
- Spectinomycin
- Spectroscopy, tissue
- Speech
- Speech audiometry
- Speech reading
- Speech reception threshold
- Speech Therapy
- Sperm
- Spermatocele
- Spermatogenesis
- Spermicide
- Sperm penetration assay
- Sphenoid sinus
- Spherocytes
- Spherocytosis
- Spherulin
- Sphincter
- Sphincter of Oddi
- Sphincterotomy
- Sphingolipid activator protein deficiencies
- Sphingolipidoses
- Sphingomyelinase deficiency
- Spider bites
- Spider nevus (angioma)
- Spider veins
- Spigelian hernia
- Spina bifida
- Spinal accessory nerve (11th cranial nerve)
- Spinal column
- Spinal cord
- Spinal fluid (see Cerebrospinal fluid)
- Spinal muscular atrophy
- Spinal nerves
- Spinal tap
- Spinal tap (see Lumbar puncture (spinal tap))
- Spine (see Spinal column; Spinal cord)
- Spinocerebellar ataxia
- Spiramycin
- Spirillum minus infection
- Spirituality
- Spirochetal infections
- Spirometry
- Spironolactone
- Splanchnic artery
- Spleen
- Splenectomy
- Splenic flexure, obstruction of
- Splenomegaly (see Spleen, enlargement of)
- Splint
- Splitting (mental)
- Spondylitis
- Spondyloarthropathy
- Spondyloepiphyseal dysplasia
- Spondylolisthesis
- Spondylolysis
- Spondylosis, cervical
- Sponge, contraceptive
- Spongiform encephalopathies
- Spooning
- Sporotrichosis
- Sports
- Spotted bones (osteopoikilosis)
- Spotted fever
- Sprain
- Sprue
- Spur
- Spur cell anemia
- Sputum
- Squamous cell carcinoma
- SRRIs (see Selective serotonin reuptake inhibitors)
- St. John's wort
- St. Louis encephalitis
- Stable fly bites
- Stains
- Stance, evaluation of
- Stanozolol
- Staphylococcal infection
- Staphylococcal scalded skin syndrome
- Staphylococcal toxic shock syndrome
- Staples, for wound closure
- Startle disease
- Starvation
- Stasis dermatitis
- Statins
- Status asthmaticus
- Status epilepticus
- Stavudine
- Steatocystoma
- Steatohepatitis
- Steatonecrosis
- Steatorrhea
- Steatosis
- Steele-Richardson-Olszewski syndrome
- Stein-Leventhal (polycystic ovary) syndrome
- Stein-Leventhal syndrome
- Stem cell transplantation
- Stenosis
- Stensen's duct
- Steppage gait
- Stereognosis
- Stereotactic radiation therapy
- Sterilization
- Sternoclavicular joint, injury to
- Sternocleidomastoid muscle
- Sternotomy, mediastinitis with
- Steroids
- Stevens-Johnson syndrome
- Stewart-Treves syndrome
- Stibophen poisoning
- Stiff baby syndrome
- Stiffness
- Stiff-person syndrome
- Still's disease
- Stillbirth
- Stingray injury
- Stings (see Bites and stings)
- Stockings
- Stomach
- Stomatitis
- Stomatocytosis
- Stones
- Stool
- Strabismus
- Strachan's syndrome
- Straight leg raising
- Strains
- Stramonium poisoning
- Stranger anxiety
- Strawberry mark
- Strawberry tongue
- Straw itch mite bites
- Strength testing
- Strength training
- Streptobacillus moniliformis infection
- Streptococcal infection
- Streptococcal toxic shock syndrome
- Streptogramins
- Streptokinase
- Streptomycin
- Stress
- Stress echocardiography
- Stress fracture
- Stress incontinence
- Stress testing
- Stretching exercise
- Striatonigral degeneration
- Stridor
- String sign
- Stroke
- Stroke index
- Strongyloidiasis
- Struma ovarii
- Strychnine poisoning
- ST segment
- Stuart-Prower factor (factor X)
- Stump
- Stupor
- Sturge-Weber syndrome
- Stye
- Subacute bacterial endocarditis
- Subacute cerebellar degeneration
- Subacute cutaneous lupus erythematosus
- Subacute sclerosing panencephalitis (SSPE)
- Subarachnoid hemorrhage
- Subclavian artery
- Subclavian steal syndrome
- Subclavian vein compression
- Subcortical arteriosclerotic encephalopathy
- Subcutaneous fat necrosis, in neonate
- Subdural empyema
- Subdural hematoma
- Subdural hemorrhage, in neonate
- Subglottic stenosis
- Subjective Global Assessment
- Sublingual capnometry
- Sublingual glands
- Subluxation
- Submandibular glands
- Submandibular space
- Subphrenic abscess
- Substance abuse disorders
- Substance P
- Succimer
- Succinylcholine
- Succinyl-CoA 3-oxoacid-CoA transferase deficiency
- Suck reflex
- Sucralfate
- Sucrose, diarrhea and
- Sudden death
- Sudden infant death syndrome (SIDS)
- Sudomotor axon-reflex test
- Sugar-water test
- Suicide
- Sulconazole
- Sulcrafate
- Sulfa, crystal formation and
- Sulfacetamide
- Sulfadiazine
- Sulfadoxine
- Sulfamethizole
- Sulfamethoxazole
- Sulfanilamide
- Sulfapyridine
- Sulfasalazine
- Sulfasalazine in rheumatoid arthritis
- Sulfatide lipidosis
- Sulfides
- Sulfinpyrazone
- Sulfisoxazole
- Sulfite oxidase deficiency
- Sulfonamides
- Sulfonylureas
- Sulfosalicylic acid test
- Sulfur dioxide
- Sulfur ointment
- Sulfur oxides
- Sulindac
- Sumatriptan
- Sumithrin poisoning
- Summation gallop
- Sundowning
- Sun exposure
- Sunitinib
- Sun-tanning lamps
- Superficial venous thrombosis
- Superior vena cava syndrome (superior mediastinal syndrome)
- Superwarfarins, poisoning with
- Supplements
- Supraglottitis
- Supraventricular rhythms, ectopic
- Supraventricular tachycardia
- Suramin
- Surfactant
- Surgery
- Surrogate decision making
- Sutton's disease
- Sutures
- Swallowing
- Swan-neck deformity
- Sweating
- Sweat test
- Sweet's syndrome
- Swimmer's ear
- Swimmers' itch
- Swimming pool conjunctivitis
- Swimming pool granuloma
- Swine confinement fever
- Swine flu
- Sydenham chorea
- Symblepharon
- Sympathetic nervous system
- Sympathetic ophthalmia
- Symptothermal method, for ovulation
- Synacthen test
- Synapse
- Synchronized intermittent mandatory ventilation
- Syncope
- Syndrome of inappropriate ADH secretion
- Syndrome X
- Synkinesia
- Synovial chondromatosis
- Synovial fluid
- Synovial sarcoma
- Synovitis
- Syphilis
- Syringobulbia
- Syringomyelia
- Syrinx
- Syrup of ipecac
- Systemic lupus erythematosus
- Systemic resistance
- Systemic sclerosis
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