**12.2 Histology**

In certain types of cancer, higher rates of VTE are found in some histological subtypes compared with others. For example, in patients with non-small-cell lung cancer, 9.9% of those with adenocarcinoma subtype develop VTE in the first 6 months after diagnosis compared with 7.7% with squamous cell carcinoma (HR 1.9, CI 1.7–2.1) 141.Inbreast and colon cancer patients, the type of histology does not predict for the incidence of cancerassociated VTE, but VTE-associated mortality rates are higher in patients with certain histological subtypes 141,143.
