Which malignant neoplasm is composed of fatty connective tissue?

The correct choice is liposarcoma, which is a type of malignant tumor that arises from fatty connective tissue. This neoplasm is characterized by the proliferation of atypical lipoblasts, which are cells that normally develop into fat cells. Liposarcomas can occur in various locations in the body, including the extremities, retroperitoneum, and other tissues where fat is present.

The identification of liposarcoma is significant due to its aggressive nature and potential to metastasize, making early diagnosis and treatment crucial. This type of tumor can be classified into different subtypes based on its histological features, and understanding the nature of this malignancy is essential for effective management and intervention strategies.

Other options, such as osteoma (a benign bone tumor), leukemia (a cancer of blood-forming tissues, primarily affecting white blood cells), and hemorrhoids (swollen veins in the lower rectum or anus), do not relate to the proliferation of fatty connective tissue and therefore are not concerned with the type of malignancy represented by liposarcoma. Recognizing the specific characteristics of different neoplasms is a key aspect of pathology, particularly within the context of malignant tumors and their treatment.