Which type of cancer is classified as a malignant neoplasm of connective tissue?

Liposarcoma is classified as a malignant neoplasm of connective tissue, specifically arising from adipose (fat) tissue. This type of cancer demonstrates the characteristics typical of sarcomas, which originate from mesenchymal cells, including connective tissues like bone, cartilage, and fat. Liposarcomas can occur in various forms and are known for their aggressive behavior and potential to metastasize.

Other types of cancer listed have different origins. Transitional cell carcinoma, for instance, arises from the urothelium, which lines the urinary bladder, and is classified as a carcinoma rather than a sarcoma. Rhabdomyosarcoma, while also a type of sarcoma, specifically originates from striated muscle tissue, and adenocarcinoma originates from glandular epithelial tissue. Each of these cancers has distinct histological features and behaviors that set them apart from the connective tissue-derived liposarcoma.