Lung adenocarcinoma pathology report appendage type refers to microinvasive adenocarcinoma, which is mainly a diagnostic criterion for adenocarcinoma in situ of the lung, and may be related to environmental and genetic factors. Microinvasive adenocarcinomas are small, isolated and discrete adenocarcinomas that grow predominantly adherent to the wall. Invasive carcinomas in any section are always less than or equal to 5 mm in diameter and are usually nonmucinous. The development of adnexal adenocarcinoma is related to many complex factors. Living for a long time in an environment with environmental pollution, chemical contamination, and electrical radiation makes you more likely to develop adenocarcinoma. Secondly, it is also related to genetic factors, family history and autoimmunity. Patients with adenocarcinoma usually have symptoms such as chest tightness, cough, coughing up blood, etc. Clinical interventions usually include surgery, chemotherapy and radiation therapy, as well as targeted therapy and immunotherapy.