Health Library

We know you need good information to make good decisions. Our Multimedia Health Library is an online health encyclopedia—and so much more. In addition to offering thousands of easy-to-understand explanations of medical conditions, symptoms, tests, and treatments, our Health Library provides hundreds of interactive decision aids and tools that will help answer your questions.

Health Topics A-Z

C

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CA

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CB

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CC

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  • CCA National Organization for Rare Disorders
  • CCD National Organization for Rare Disorders
  • CCD National Organization for Rare Disorders
  • CCHS National Organization for Rare Disorders
  • CCHS with Hirschsprung disease, included National Organization for Rare Disorders
  • CCM Syndrome National Organization for Rare Disorders
  • CCMS National Organization for Rare Disorders
  • CCO National Organization for Rare Disorders

CD

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CE

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CF

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CG

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  • CGD National Organization for Rare Disorders
  • CGF National Organization for Rare Disorders
  • CGL National Organization for Rare Disorders
  • CGL National Organization for Rare Disorders

CH

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CI

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CJ

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  • CJD National Organization for Rare Disorders
  • CJD Voice Support Groups

CK

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  • CK National Organization for Rare Disorders

CL

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CM

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  • CM National Organization for Rare Disorders
  • CMD National Organization for Rare Disorders
  • CMD National Organization for Rare Disorders
  • CMDI National Organization for Rare Disorders
  • CMM National Organization for Rare Disorders
  • CMT National Organization for Rare Disorders
  • CMT4E National Organization for Rare Disorders
  • CMTC National Organization for Rare Disorders
  • CMV National Organization for Rare Disorders

CN

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  • CN National Organization for Rare Disorders
  • CNC National Organization for Rare Disorders
  • CNL8 Nail Medication
  • CNM National Organization for Rare Disorders

CO

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CP

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CR

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CS

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CT

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CU

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CV

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CY

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Symptom Checker

Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.

Symptom Checker