Sacral Dimple
Sacroiliitis
Saddle Nose
Salivary Gland Cancer
Salivary Stones (Sialolithiasis)
Salmonella
Samhainophobia (Fear of Halloween)
Sand Flea Bites
Sandhoff Disease
Sandifer Syndrome
Sarcoidosis
Sarcoma
Sarcomatoid Carcinoma
Sarcopenia
Scabies
Scalp Pimples and Acne
Scalp Psoriasis
Scalp Yeast Infection
Scaphocephaly (Sagittal Craniosynostosis)
Scaphoid Fracture
Scapholunate Dissociation
Scarlet Fever
Scarring Alopecia
Schistosomiasis
Schizencephaly
Schizoaffective Disorder
Schizoid Personality Disorder
Schizophrenia
Schizophreniform Disorder
Schizotypal Personality Disorder
Schwannoma
Sciatica
Scimitar Syndrome
Scleritis
Scleroderma
Sclerosing Mesenteritis
Scolionophobia (Fear of School)
Scoliosis
Scorpion Stings
Scotoma
Scrofula
Scurvy
Seasonal Depression (Seasonal Affective Disorder)
Sebaceous Carcinoma
Sebaceous Filaments
Sebaceous Hyperplasia
Seborrheic Dermatitis
Seborrheic Keratosis
Secondary Cough Headache
Secondary Hypertension
Secondary Infertility
Second-Degree Burn
Segmental Fracture
Seizure
Selective IgA Deficiency
Selective Mutism
Selenophobia (Fear of the Moon)
Self-Harm (Nonsuicidal Self-Injury Disorder)
Semen Allergy
Separated Shoulder
Separation Anxiety
Sepsis
Sepsis in Newborns
Septate Hymen
Septate Uterus
Septic Arthritis
Septic Shock
Septicemia
Serotonin Syndrome
Serrated Polyps
Serum Sickness
Sesamoiditis
Sever’s Disease (Calcaneal Apophysitis)
Severe Acute Respiratory Syndrome (SARS)
Sex Addiction, Hypersexuality and Compulsive Sexual Behavior
Sexual Dysfunction
Sexually Transmitted Infections
Sézary Syndrome
Shaken Baby Syndrome
Sheehan Syndrome
Shift Work Sleep Disorder (SWSD)
Shigella Infection (Shigellosis)
Shingles
Shone’s Complex
Short Bowel Syndrome in Children
Short Q-T Syndrome (SQTS)
Short Sleeper Syndrome (SSS)
Shoulder Arthritis
Shoulder Dystocia
Shoulder Fracture
Shoulder Impingement (Rotator Cuff Tendinitis)
Shoulder Pain
Shoulder Sprain
Shoulder Tendonitis
Shprintzen-Goldberg Syndrome
Shwachman-Diamond Syndrome (SDS)
Shy Bladder Syndrome (Paruresis)
SIADH (Syndrome of Inappropriate Antidiuretic Hormone Secretion)
Sialadenitis
Sick Sinus Syndrome
Sickle Cell Anemia
Sickle Cell Disease
Sideroblastic Anemia
SIDS (Sudden Infant Death Syndrome)
Silent Aspiration
Silent Heart Attack
Silent Migraine (Typical Aura Without Headache)
Silent Sinus Syndrome
Silicosis
Sinding-Larsen-Johansson Syndrome
Sinus Arrhythmia
Sinus Bradycardia
Sinus Headaches
Sinus Infection (Sinusitis)
Sinus Pressure
Sinus Tachycardia
Sinus Tarsi Syndrome
SIRS (Systemic Inflammatory Response Syndrome)
Situs Inversus
Sixth Nerve Palsy
Sjögren’s Syndrome
Skeeter Syndrome
Skene’s Gland Cyst
Skew Foot
Skin Cancer
Skin Cancer on Ear
Skin Conditions in Children
Skin Diseases
Skin Fungus
Skin Lesions
Skin Rash
Skin Tags (Acrochordons)
Skull Fracture
SLAP Tear
Sleep Anxiety
Sleep Apnea
Sleep Deprivation
Sleep Disorders
Sleep Paralysis
Sleep Problems with Parkinson’s Disease
Sleep-Related Eating Disorders
Sleepwalking
Slipped Capital Femoral Epiphysis (SCFE)
Small Cell Lung Cancer
Small Fiber Neuropathy
Small Intestine Cancer
Smallpox
Smegma
Smelly Scalp
Smith Fracture
Smith-Magenis Syndrome
Smoking Cessation
Smoldering Multiple Myeloma (SMM)
SMV Thrombosis
Snake Bites
Sneddon Syndrome
Sneezing
Snoring
Social Anxiety Disorder (Social Phobia)
Soft Palate Cancer
Soft Tissue Sarcoma
Solar Retinopathy
Solitary Fibrous Tumors
Solitary Rectal Ulcer Syndrome
Somatic & Germline Mutations
Somatic Pain
Somatic Symptom Disorder in Adults
Somniphobia (Fear of Sleep)
Somogyi Effect
Sore Nipples
Sore Throat (Pharyngitis)
Sore Throat and Headache
Sotos Syndrome
Soy Allergy
Spanish Flu
Spasmodic Dysphonia
Spasticity
Specific Carbohydrate Diet (SCD)
Speech Impediment
Spermatocele
Sphincter of Oddi Dysfunction
Spider Angioma
Spider Bites
Spider Veins
Spina Bifida
Spina Bifida Occulta
Spinal Arthritis
Spinal Cord Injury
Spinal Headaches
Spinal Hemangioma
Spinal Metastasis
Spinal Muscular Atrophy (SMA)
Spinal Stenosis
Spinal Tumors
Spindle Cell Lipoma
Spindle Cell Sarcoma
Spinocerebellar Ataxia
Spiral Fracture
Spitz Nevus
Spitzoid Melanoma
Spleen Cancer
Splenic Artery Aneurysm
Splinter Hemorrhage
Spondyloarthritis (Spondyloarthropathy)
Spondyloepiphyseal Dysplasia Congenita
Spondylolisthesis
Spondylolysis
Spontaneous Coronary Artery Dissection (SCAD)
Sports Hernia
Sports Injuries
Spots on Tongue
Sprained Ankle
Sprained Thumb
Sprained Wrist
Sprains
Squamous Cell Carcinoma
Squamous Intraepithelial Lesion (SIL)
Squamous Metaplasia
Stable Angina
Staghorn Calculus
Staph Infection
Stargardt Disease
Status Epilepticus
Status Migrainosus
Steatorrhea
Steatotic (Fatty) Liver Disease
STEMI Heart Attack
Stevens-Johnson Syndrome
Stickler Syndrome
Stiff Neck
Stiff Person Syndrome
Still’s Murmur
Stillbirth
Stockholm Syndrome
Stokes-Adams Syndrome
Stomach Cancer
Stomach Flu
Stomach Polyps
Stomach Ulcer
Stork Bite
Strabismus (Eye Misalignment)
Strawberry Hemangiomas
Strep Throat
Stress
Stress Fractures
Stress Incontinence
Stretch Marks
Stridor
Stroke
Strongyloidiasis
Structural Heart Disease
Stubbed Toe
Sturge-Weber Syndrome
Stuttering
Stye
Subacute Cutaneous Lupus
Subarachnoid Hemorrhage (SAH)
Subchorionic Hematoma
Subclavian Artery Stenosis
Subclavian Steal Syndrome
Subclinical Hyperthyroidism
Subclinical Hypothyroidism
Subconjunctival Hemorrhage
Subdural Hematoma
Subgaleal Hemorrhage in Newborns
Subglottic Stenosis
Submucous Cleft Palate
Substance Use Disorder (SUD)
Substantia Nigra (SN)
Subungual Melanoma
Sudden Arrhythmic Death Syndrome
Sudden Cardiac Death
Sudden Vision Loss
Sulfa Allergy
Sulfite Sensitivity
Summer Penile Syndrome
Sun Allergy
Sunburn
Sun-Damaged Skin (Photoaging)
Sundown Syndrome
Superfetation
Superficial Thrombophlebitis
Superior Canal Dehiscence Syndrome
Superior Vena Cava Syndrome
Susac Syndrome
SVT (Supraventricular Tachycardia)
Sweet Syndrome
Swimmer’s Itch (Cercarial Dermatitis)
Swimmer’s Ear (Otitis Externa)
Swimmer’s Shoulder
Swine Flu (H1N1)
Swollen Gums
Swollen Knee
Swollen Lymph Nodes
Swollen Lymph Nodes in the Groin
Swollen Lymph Nodes in the Neck (Cervical Lymphadenopathy)
Swollen Taste Buds
Swollen Testicles (Scrotal Swelling)
Swyer Syndrome (XY Gonadal Dysgenesis)
Sydenham Chorea
Symbrachydactyly (Short, Joined Fingers)
Symphysis Pubis Dysfunction
Syncope
Syndactyly (Webbed Digits)
Synechiae (Eye)
Synesthesia
Synovial Osteochondromatosis
Synovial Sarcoma
Synovitis
Syphilis
Syringoma
Syringomyelia
Systemic Mastocytosis
Systolic Heart Failure
Systolic Heart Murmur