Classification of bladder cancer Currently, the most common classification is by histological type. It can be divided into metastatic cell carcinoma, squamous cell carcinoma and adenocarcinoma.
1.Migratory cell carcinoma accounts for about 90% of bladder cancer, and the degree of differentiation also varies. It is mainly divided into well-differentiated cephalic non-invasive and highly undifferentiated invasive carcinoma. About 70% of them are well-differentiated papillary carcinomas, and 25%-30% are invasive carcinomas with different degrees of differentiation. According to different degrees of differentiation, metastatic cell carcinoma is divided into metastatic cell carcinoma grade I, metastatic cell carcinoma grade II and metastatic cell carcinoma grade III.
Squamous cell carcinoma is smaller than metastatic cell carcinoma, accounting for about 5% of bladder cancer, and often occurs on the basis of metastatic bladder epithelium, and most of these patients have chronic inflammation combined with mucosal white spots. Most of them are infiltrative with varying degrees of differentiation, as few cases are both squamous cell carcinoma and metastatic cell carcinoma (mixed type), and generally squamous cell carcinoma alone has a better prognosis than mixed type bladder cancer.
Adenocarcinoma Compared to the other two types, the proportion of adenocarcinoma is less, accounting for about 1-2% of the total cases of bladder cancer. From the remnants of the umbilical ureter, periurethral and periprostatic glands, cystic and glandular cystitis or metastatic epithelial metaplasia, it can infiltrate deep into the bladder wall with high malignancy, rapid disease progression and poor prognosis.