The Application dimension of the Bile Duct Cancer (Cholangiocarcinoma) Treatment market is divided into three principal use‑cases: surgical resection, systemic therapy, and radiation therapy. Surgical resection, encompassing hepatectomy, liver transplantation, and bile‑duct excision, remains the only potentially curative approach and therefore commands the largest share of market revenue, estimated at roughly 45 % of total sales. Systemic therapy, which includes chemotherapy, targeted agents, and emerging immunotherapies administered in neoadjuvant, adjuvant, or palliative settings, accounts for about 40 % of the market, driven by the high incidence of unresectable disease and the expanding pipeline of molecularly tailored drugs. Radiation therapy—primarily external beam radiation and brachytherapy—covers the remaining ~15 % and is primarily utilized for local control in patients unsuitable for surgery or as adjunct to systemic regimens. Growth projections indicate that the surgical segment will modestly expand as early‑diagnosis programs increase resectability rates, while systemic therapy is expected to outpace the market due to accelerated approvals of targeted and immuno‑oncology agents. Collectively, these application segments shape the overall market size and are reflected in the accompanying Bile Duct Cancer (Cholangiocarcinoma) Treatment segmentation pie chart.