Difficult differential diagnosis of bladder pedicled masses about metastasis from non-small cell lung cancer: A case report.

Differential diagnoses of primary bladder tumors from metastasis ones can be difficult, for the symptom and imaging findings are pretty similar. Here, we reported a case of bladder metastasis from lung adenocarcinoma. A 73-year-old female patient who was diagnosed with bladder metastasis from lung adenocarcinoma presented as gross hematuria and multiple pedicled masses in the bladder on MRI scan. Such clinical manifestations were easily misdiagnosed as primary bladder malignancy. Additionally, the tumor samples of this case were further harvested and processed for histopathological analysis and gene detections to confirm this case as a metastasis tumor that was refractory to the subsequent therapy. Diagnosis of bladder metastasis should be paid more consideration in patients with a history of cancer despite the fact that primary bladder malignancy accounts for the majority of bladder masses.