Pathology of colorectal, breast, thyroid, and gastric cancer

Demographic and pathological data of 194 colon cancer patients, 137 breast cancer patients, 124 gastric cancer patients, and 169 thyroid cancer patients referred to the healthcare centers of Qazvin province in Iran were recorded from their pathology files. In this retrospective study, we gathered data in the time window from 2010 to 2020.The features extracted from the pathology files for colon cancer patients were sex, age, surgery type, tumor site, tumor size, tumor configuration, histologic type, histologic grade, extent of invasion (primary tumor, PT), number of involved regional lymph nodes, distant metastasis, surgical margin status, angiolymphatic invasion, perineural invasion, Duke's stage, and survival.Recorded features from patients with breast cancer included sex, age, laterality, surgery type, tumor site, tumor size, histologic type, histologic grade, number of involved regional lymph nodes, distant metastasis, angiolymphatic invasion, microcalcification, in situ component, deep surgical margin status, and survival.Also, data collected for gastric cancer include the age, gender, surgery type, tumor site, tumor configuration, tumor size, histologic type, histologic grade, the extent of invasion (primary tumor, PT), number of involved regional lymph nodes, distant metastasis, surgical margin status, angiolymphatic invasion, perineural invasion, omentum involvement and survival.Finally, the features of thyroid cancer patients included in this study were sex, age, surgery type, thyroid gland weight, tumor site, tumor size, encapsulation, capsular invasion, angiolymphatic invasion, extrathyroidal extension, multicentricity, C cell hyperplasia, additional findings, existence of the parathyroid gland, number of involved regional lymph nodes, and survival.