Bladder cancer is a significant global and local health concern, and predicting how aggressive a patient's tumor will behave is critical for guiding treatment. This observational study aims to evaluate two specific microscopic features of urothelial bladder carcinoma to see if they can reliably predict patient outcomes: the depth of early tumor invasion (T1 substaging) and the presence of small clusters of cancer cells at the tumor's edge (Tumor Budding).
Researchers will retrospectively analyze tissue samples (paraffin blocks) from at least 100 patients who were diagnosed with urothelial bladder carcinoma and underwent transurethral resection (TUR) at the South Egypt Cancer Institute between 2018 and 2024.
The tissue samples will be analyzed in two main ways:
* Early-stage tumors (pT1 cases): Researchers will carefully measure the exact depth the tumor has invaded the bladder lining using anatomical and micrometric sub-classification systems. * More advanced tumors (pT2 cases): Researchers will examine the invasive edge of the tumors under a microscope to count "tumor buds" (single cells or small clusters of cells).
By comparing these detailed microscopic measurements with the patients' historical medical records, the study hopes to determine if T1 substaging and Tumor Budding are strong predictors of disease recurrence, disease progression, and overall patient survival.
Patients with a urinary bladder mass, diagnosed by TUR biopsy as urothelial carcinoma.
Patients with full clinical data and complete medical reports.
Cases with non-urothelial histological subtypes (e.g., pure squamous cell carcinoma).
Patients who received neoadjuvant chemotherapy or radiotherapy.
Cases with missing or inaccessible clinical follow-up data.
History of prior or concurrent malignancy.