What is supraglottic sulcus carcinoma? Is supraglottic sulcus carcinoma a carcinoma of the pulmonary apex? Prof. Jian You: The suprapulmonary sulcus is an anatomical structure of the lung, mainly an indentation of the subclavian artery at the tip of the lung. The supraglottic sulcus is a cancer that appears in the special area of the supraglottic sulcus. Supraglottic sulcus carcinoma is a type of carcinoma of the pulmonary apex. What is the relationship between supraglottic sulcus cancer and lung cancer? Prof. Jian You: Supraglottic sulcular lung cancer belongs to lung cancer, which is mainly concentrated in the lung apical cancer in the upper lobe of the lung. Most of the apical lung cancers belong to lung adenocarcinoma, squamous carcinoma and large cell undifferentiated carcinoma, of which lung adenocarcinoma accounts for most. Only a very small proportion belongs to small cell lung cancer. In the domestic population, mainly long-term old tuberculosis infection can become cancerous and predispose to the formation of scar carcinoma, which is usually concentrated in the apical part of the lung.