| Abbreviations | Meaning |
 | SCLC | Small Cell Lung Carcinoma |
 | SCPS | Skin Cancer Prevention Study |
 | SCS | Synovial Chondrosarcoma |
 | SCT | Sertoli Cell Tumor |
 | SCT | Solid Cystic Tumor |
 | SCTAT | Sex Cord Tumor With Annular Tubules |
 | SCTN | Scottish Cancer Therapy Network |
 | SCUP | Skin Cancer Utrecht-Philadelphia [Utrecht And Philadelphia Study On UVR-caused Cancer] |
 | SCV | Squamous Cell Carcinoma Of The Vulva |
 | SDS | Squamous [cell Carcinoma] Dataset |
 | SEER | Surveillance Epidemiology And End Results [program Of The National Cancer Institute] |
 | SETTLE | Spindle Epithelial Tumor With Thymus-like Differentiation |
 | SFT | Sabin-Feldman Test; Second Field Tumor; Sensory Feedback Therapy; Skinfold Thickness |
 | SGC | Salivary Gland Carcinoma |
 | SGCRC | German Study Group On Colo-Rectal Carcinoma |
 | SGF | Sarcoma Growth Factor; Skeletal Growth Factor |
 | SGSG | Scandinavian Glioma Study Group |
 | SIS | Simian Sarcoma |
 | SISV, SISV | Simian Sarcoma Virus |
 | SK | Sloan-Kettering [Institute For Cancer Research] |
 | SL | Secondary Leukemia |
 | SLL | Small Lymphocytic Lymphoma |
 | SML | Smouldering Leukemia |
 | SMT | Spontaneous Mammary Tumor |
 | SMULV | Scripps Murine Leukemia Virus |
 | SNLG | Scottish And Newcastle Lymphoma Group |
 | SPOHNC | Support For People With Oral And Head And Neck Cancer |
 | SPT | Second Primary Tumor |
 | SQ CELL CA | Squamous Cell Carcinoma |
 | SR-RSV | Schmidt-Ruppin Rous Sarcoma Virus |
 | SRC | Rous Sarcoma Oncogene |
 | SSAV | Simian Sarcoma-associated Virus |
 | SSM | Superficial Spreading Melanoma |
 | SSM | Skin-sparing Mastectomy; Solid-state Microscopy; Subsynaptic Membrane; Superficial Spreading Melanoma; System Status Management |
 | SSV | Schoolman-Schwartz Virus; Simian Sarcoma Virus |
 | ST | Tumor Surgery [TNM (tumor-node-metastasis) Classification: ST0 Surgery Not Done, ST1 Complete Resection, ST2 Resection, 50% To 90%, ST3 Resection 5% To 50%, ST4 Biopsy, And ST5 Shunting] |
 | ST | Solid Tumor |
 | STC | Sarcomatoid Thymic Carcinoma |
 | STD | Skin-to-tumor Distance |
 | STFESV | Snyder-Theilen Feline Sarcoma Virus |
 | STNF | Soluble Tumor Necrosis Factor |
 | STNFR | Soluble Tumor Necrosis Factor Receptor |
 | STNM | Tumor Node Metastasis [TNM] Staging |
 | STS | Soft Tissue Sarcoma |
 | SV | Sarcoma Virus |
 | SVCP | Special Virus Cancer Program |
 | SX | Scleral Invasion Cannot Be Assessed [TNM (tumor-node-metastasis) Classification] |
 | T | Extent Of Primary Tumor |
 | T | Primary Tumor [TNM (tumor-node-metastasis) Classification: T0 No Evidence Of Primary Tumor, T1 To T4 Tumors In Progressing Sizes, And TX No Evidence Of Primary Tumor] |
 | T NM | Tumor With Lymph Node Metastases |