Salmonellosis@
Sanfilippo Syndrome@
San Joaquin Valley Fever@
Sarcoma@
SARS@
Scarlet Fever@
Schistosomiasis@
Schizencephaly@
Schizoaffective Disorder@
Schizoid Personality Disorder@
Schizophrenia@
Schizotypal Personality Disorder@
Sciatica@
Scleroderma@
Scoliosis@
Scurvy@
Seasonal Affective Disorder@
Seborrheic Dermatitis@
Selective Mutism@
Self Injury@
Semantic-Pragmatic Disorder@
Sexually Transmitted Diseases@
Sexual Addiction@
Sexual Dysfunctions@
Shaken Baby Syndrome@
Shigellosis@
Shingles@
Short Bowel Syndrome@
Shprintzen Syndrome@
Shwachman Syndrome@
Shy-Drager Syndrome@

Shyness@
Sickle Cell Disease@
SIDS@
Silver-Russell Syndrome@
Sinusitis@
Sitosterolemia@
Sjogren's Syndrome@
Skin Disorders@
Sleeping Sickness@
Sleep Apnea@
Slipped Disk@
Smallpox@
Smith-Magenis Syndrome@
Smith-Theiler-Schachenmann Syndrome@
Smith Lemli Opitz Syndrome@
Snoring@
Social Anxiety@
Soft Tissue Sarcoma@
Solar Keratosis@
Somatization Disorder@
Somatoform Disorders@
Sore Throat@
Soto's Syndrome@
Southern Tick-Associated Rash Illness@
Spastic Colon@
Speech Disorders@
Spinal Cord Compression@
Spinal Cord Diseases, Neurological@
Spinal Cord Syphilis@
Spinal Muscular Atrophy@
Spina Bifida@

Spine Disorders@
Spinocerebellar Degenerations@
Sprains and Strains@
Squint@
St. Vitus' Dance@
Staphylococcal Infections@
Stein-Leventhal Syndrome@
Stevens-Johnson Syndrome@
Stickler's Syndrome@
Stiff-Person Syndrome@
Stomach Cancer@
Stomach Flu@
Strabismus@
Strep Throat@
Stress@
Stroke@
Sturge-Weber Syndrome@
Stuttering@
Subacute Sclerosing Panencephalitis@
Substance Abuse@
Substance Related Disorders@
Suicide@
Sunburn@
Swift Disease@
Sydenham's Chorea@
Syncope@
Syphilis@
Syringomyelia@
Systemic Lupus Erythematosus@