Atypical manifestations of primary pulmonary adenocarcinoma with signet ring features: A case report.

Demir T, Zoreb P. Atypical manifestations of primary pulmonary adenocarcinoma with signet ring features: A case report. Case Study and Case Report 2023; 13(1): 8 - 11. ABSTRACT Primary pulmonary malignancies are among the most frequent cancers in the world. Adenocarcinoma is the most common non-small cell lung cancer, however there are various subtypes with different molecular and genetic expressions that cause different symptoms. Rare manifestations include chronic back pain and tracheal bronchial tumors. Because more than 95% of tracheal bronchial tumors are benign, they are rarely biopsied. There have been a few reports of secondary tracheal bronchial tumors caused by lung adenocarcinoma. We present the first case report of a rare presentation of primary pulmonary cancer. Key words: adenocarcinoma, manifestation, signet ring