Cancer Types and Tissue Origins
Educational orientation
Source-checked: 2026-06-05. This page explains naming logic; it does not classify a personal diagnosis.
Core Idea
Cancer names usually combine where the disease started, what cell type it resembles, and sometimes molecular features. Carcinomas arise from epithelial tissues, sarcomas from connective or supporting tissues, leukemias and lymphomas from blood or immune cells, and central nervous system tumors have their own classification logic.
Two cancers in the same organ can behave differently. Two cancers in different organs can share a molecular target. That is why modern oncology uses anatomy, histology, stage, and biomarkers together.
Essential Vocabulary
- Site: organ or anatomic origin.
- Histology: microscopic tissue pattern.
- Subtype: a more specific category.
- Lineage: the cell identity a cancer resembles.
What This Does Not Mean
The organ name alone is not enough to understand biology or evidence.
Builder/Data Lens
Use controlled vocabularies when possible. Free-text cancer type labels are messy and often mix site, histology, and stage.
Go Deeper
References
- National Cancer Institute. What Is Cancer?
- National Cancer Institute. NCI Dictionary of Cancer Terms