Salivary duct stones Salivary gland disorders Salivary gland tumors Salmonella enterocolitis Sarcoidosis Sarcoptes scabiei SARS Scarlatina SCD Schizoaffective disorder Schizophrenia Schizotypal personality disorder Scrofula Seasonal affective disorder Secondary hyperparathyroidism Secondary syphilis Seizure - temporal lobe Selective mutism Separation anxiety Sepsis Septal hematoma Serum sickness Shigella enteritis Short bowel syndrome Sjogren syndrome Skin growths - fatty Skin lesion of blastomycosis Skin lesion of coccidioidomycosis Skin lesion of histoplasmosis Sleep disorders Sleep disorders in the elderly Sleep walking Smallpox Solitary pulmonary nodule Spasmus nutans Spinal muscular atrophy Spinal stenosis Spinal tumor Splenic infarction Spondylolisthesis Sporotrichosis St. Vitus dance Staph aureus food poisoning Staphylococcal toxic shock syndrome Stasis dermatitis and ulcers Stereotypic movement disorder Stress gastritis Stroke related to cocaine use Stroke secondary to atherosclerosis Stroke secondary to carotid dissection Stroke secondary to carotid stenosis Stroke secondary to syphilis Strongyloidiasis Stuttering Subdural effusion Subdural hematoma Suicide and suicidal behavior Superficial thrombophlebitis Superior vena cava obstruction Supranuclear ophthalmoplegia Synovitis - toxic Syphilitic myelopathy Syringomyelia