Who's Leading Who? T-Cell Density and Metastatic Risk in Skin

The pattern of metastases in melanoma has been widely studied, although the drivers of these patterns remain unknown. The head and neck area is a common site of deposits on skin. Investigators studied the correlation between T-cell density and metastatic risk in the skin and found some interesting results.

They examined 1984 biopsy specimens of cutaneous metastases, mapped their anatomic distribution, and compared the proportional frequency of metastases with the immunological microenvironment at those sites. They also compared these samples with 140 healthy control samples, measuring the density of regulatory, CD4 effector, and CD8 T cells by flow cytometry. They found the highest per-area frequency of cutaneous metastases on the head and n…