What are the Histological Features of Different Tumors?

Different types of tumors exhibit distinct histological features:

- Carcinomas: Originating from epithelial cells, they often show glandular structures or squamous differentiation.
- Sarcomas: Derived from mesenchymal tissue, they display spindle-shaped cells and extracellular matrix components.
- Lymphomas: Involving lymphoid tissue, they consist of abnormal lymphocytes and a disrupted lymph node architecture.
- Melanomas: Arising from melanocytes, they exhibit pigmented cells with pleomorphic nuclei.