https://www.selleckchem.com/products/sch772984.html To the best of our knowledge, this is the first such case in English literature. This case demonstrates the importance of tumor morphology and immunohistochemical testing in HPV-related oropharyngeal carcinomas, despite the overall good prognosis of such tumors, due to the possibility of synchronous or colliding primary neoplasms. To the best of our knowledge, this is the first such case in English literature. This case demonstrates the importance of tumor morphology and immunohistochemical testing in HPV-related oropharyngeal carcinomas, despite the overall good prognosis of such tumors, due to the possibility of synchronous or colliding primary neoplasms. Treatment of refractory/relapsing diffuse large B cell (R/R DLBCL) lymphoma remains a challenge. Radiation therapy (RT) has versatile roles in R/R DLBCL treatment it can be used in the peri-transplant setting for transplant-eligible candidates, or as a salvage or palliation therapy depending on the extent of the disease in transplant-ineligible patients. The introduction of chimeric antigen receptor (CAR) T-cell therapy has changed the landscape of R/R DLBCL. RT has been used as a bridging therapy to CAR T-cell therapy in order to control disease progression during its manufacturing period. However, optimal RT and CAR T-cell therapy integration is still unknown. Salvage strategies for R/R DLBCL post-CAR T-cell therapy have been little studied. Here, we present a case of primary refractory DLBCL with residual disease post-CAR T-cell therapy successfully treated with salvage RT. Radiotherapy could be an effective salvage strategy for R/R DLBCL post-CAR T-cell therapy. Exact mechanisms await exploring. Radiotherapy could be an effective salvage strategy for R/R DLBCL post-CAR T-cell therapy. Exact mechanisms await exploring. Stage III breast cancer comprises a broad spectrum of disease, including the extent of supraclavicular/internal mammary lymph node metastasis.