37 bytes added ,  14:26, 22 April 2013
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'''Cystine'''
 
'''Cystine'''
 
:occurs with cystinuria
 
:occurs with cystinuria
:'''radiodense''' on radiographs
+
:'''radiodense''' on radiographs, but may occasionally be radiolucent
    
'''Calcium carbonate'''
 
'''Calcium carbonate'''
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