Swimmers'  | 
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  Swimming in the head  780.4 | 
  Swollen - see also Swelling  | 
   | 
  Swyer-James syndrome (unilateral hyperlucent lung)  492.8 | 
  Swyer's syndrome (XY pure gonadal dysgenesis)  752.7 | 
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  Sydenham's chorea - see Chorea, Sydenham's  | 
  Sylvatic yellow fever  060.0 | 
  Sylvest's disease (epidemic pleurodynia)  074.1 | 
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  Sympathetic - see condition  | 
  Sympatheticotonia (see also Neuropathy, peripheral, autonomic)  337.9 | 
  Sympathicoblastoma (M9500/3)  | 
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  Sympathicogonioma (M9500/3) - see Sympathicoblastoma  | 
  Sympathoblastoma (M9500/3) - see Sympathicoblastoma  | 
  Sympathogonioma (M9500/3) - see Sympathicoblastoma  | 
  Symphalangy (see also Syndactylism)  755.10 | 
  Symptoms, specified (general) NEC  780.99 | 
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  Synchysis (senile) (vitreous humor)  379.21 | 
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  Syncope (near) (pre-)  780.2 | 
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  Syncytial infarct - see Placenta, abnormal  | 
  Syndactylism, syndactyly (multiple sites)  755.10 | 
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  Syndrome - see also Disease  | 
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  Synechia (iris) (pupil)  364.70 | 
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  Synesthesia (see also Disturbance, sensation)  782.0 | 
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  Synostosis (congenital)  756.59 | 
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  Synovial - see condition  | 
  Synovioma (M9040/3) - see also Neoplasm, connective tissue, malignant  | 
   | 
  Synoviosarcoma (M9040/3) - see Neoplasm, connective tissue, malignant  | 
  Synovitis (see also Tenosynovitis)  727.00 | 
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  Syphilis, syphilitic (acquired)  097.9 | 
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  Syringadenoma (M8400/0) - see also Neoplasm, skin, benign  | 
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  Syringocarcinoma (M8400/3) - see Neoplasm, skin, malignant  | 
  Syringocystadenoma (M8400/0) - see also Neoplasm, skin, benign  | 
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  Syringocystoma (M8407/0) - see Neoplasm, skin, benign  | 
  Syringoma (M8407/0) - see also Neoplasm, skin, benign  | 
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