The prefix cyst- or cysto- is commonly used when pertaining to the bladder. I would starting looking there. An example is "cystitis" - inflammation of the bladder.
bladder cancer
Osteosarcoma is a malignant tumor of osteoblasts.
hepatoma
Chondrosarcomachondrosarcomachondrosarcoma
A malignant tumour means that it is a tumour which has cancer
lymphoma
thyroid neoplasm
Myosarcoma
sarcoma
Cancer is the medical term meaning malignant and invasive tumor.
Neoplasm is the medical term meaning tumor; a neoplasm can be malignant (cancerous) or benign.
A malignant tumour of epithelial origin is called a carcinoma.
malignant melanoma