| Degeneration, degenerative | 
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  | lenticular (familial) (progressive) (Wilson's) (with cirrhosis of liver) 275.1 | 
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  | lethal ball, prosthetic heart valve 996.02 | 
  | ligament | 
  | collateral (knee) (medial) 717.82 | 
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  | cruciate (knee) (posterior) 717.84 | 
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  | parenchymatous, acute or subacute (see also Necrosis, liver) 570 | 
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  | macula (acquired) (senile) 362.50 | 
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  | familial pseudoinflammatory 362.77 | 
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  | medullary - see Degeneration, brain | 
  | membranous labyrinth, congenital (causing impairment of hearing) 744.05 | 
  | meniscus - see Derangement, joint | 
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  | mitral - see Insufficiency, mitral | 
  | Mönckeberg's (see also Arteriosclerosis, extremities) 440.20 | 
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  | motor centers, senile 331.2 | 
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