Stage IV Lung Adenocarcinoma Presenting as Persistent Chest Pain and Rib Metastasis

What happened, in summary

A 69-year-old man had repeated episodes of chest pain that were initially difficult to separate from his coronary artery disease and reflux. Lung nodules had been visible on earlier scans, but he repeatedly declined additional testing. Over time, one left upper-lung nodule enlarged and developed increasingly suspicious features.

When his symptoms later worsened, imaging showed destruction of the left fifth rib with a soft-tissue mass. Biopsy confirmed adenocarcinoma consistent with a lung primary, and the cancer was classified as Stage IV because of bone metastasis. Tumor testing found a TP53 mutation, PD-L1 expression of 30%, and no sensitive driver mutation.

He received a bisphosphonate for the painful bone lesion and began immune checkpoint inhibitor treatment. High-precision radiotherapy was attempted for the fifth-rib metastasis but was stopped after the first treatment because he could not tolerate it. His experience shows how cancer-related pain can be masked by other chronic conditions and how repeated delays in diagnostic follow-up can allow disease to progress before treatment begins.