The document details a case summary of a 40-year-old female diagnosed with poorly differentiated adenocarcinoma of the gallbladder, initially presenting with abdominal pain and gallstones, followed by imaging that revealed lymph node involvement. It discusses gallbladder cancer as a malignant disease, its epidemiology, diagnostic workup, potential therapies, and staging based on the TNM classification. The prognosis varies significantly depending on cancer stage, with early-stage detection linked to higher survival rates.