series – clinical study – clinical trial – CLL – clodronate – clofarabine – CML – CMML – CMV – cnicin – CNS – CNS metastasis – CNS prophylaxis – CNS sanctuary – CNS tumor – co-culture – co-trimoxazole – coactivated T cell – cobalt 60 – Cockayne syndrome – coenzyme Q10 – cohort study – COL-3 – cold nodule – Coley's toxins – collagen disease – collagenase – collecting duct – coloanal anastomosis – coloanal pull-through – Colorectal cancer (colon cancer) – colon polyp – colonoscope – colonoscopy – colony-stimulating factor – colorectal – colposcope – colposcopy – combination chemotherapy – combretastatin A4 phosphate – comedo carcinoma – common bile duct – comorbidity – compassionate use trial – complementary and alternative medicine – complete blood count (CBC) – complete hysterectomy – complete metastasectomy – complete remission – complete response – compound nevus – compression bandage – computed tomographic colonography – computed tomography – computed tomography colography – computerized axial tomography – computerized tomography – concurrent therapy – condylomata acuminata – cone biopsy – congestive heart failure – conization – consecutive case series – consolidation therapy – contiguous lymphoma – continent reservoir – contingency management – continuous hyperthermic peritoneal perfusion – continuous infusion – contralateral – control animal – control group – controlled clinical trial – controlled study – conventional therapy – conventional treatment – cooperative group – CoQ10 – cordectomy – cordycepin – core biopsy – corticosteroid – Corynebacterium granulosum – coumestan – coumestrol – CP-358,774 – CP-609,754 – CP-724,714 – CP4071 – CpG 7909 – CPT 11 – CQS – craniopharyngioma – craniotomy – creatine – creatinine – cribriform – crisnatol mesylate – Crohn's disease – cryopreservation – cryosurgery – cryotherapy – cryptorchidism – CSF – CT scan – CT-2103 – CT-2106 – CT-2584 – CTC – cultured cell – cultured cell line – cumulative dose – curcumin – cutaneous breast cancer – cutaneous T-cell lymphoma – cyanogenic glucoside – cyclooxygenase-2 selective inhibitor – cyclophosphamide – cyclosporine – cyproheptadine – cyproterone acetate – cyst – cystectomy – cystosarcoma phyllodes – cystoscope – cystoscopy – cytarabine – cytochlor – cytogenetics – cytokine – cytology – cytomegalovirus – cytopenia – cytoplasm – cytotoxic – cytotoxic chemotherapy – cytotoxic T cell D D-20761 – da-huang – dacarbazine – dacliximab – daclizumab – dactinomycin – daidzein – dalteparin – danazol – darbepoetin alfa – darkfield microscope – Data Safety and Monitoring Committee