Read the Following Excerpt from a Patient's Health Record: on Exam

Read the following excerpt from a patient's health record: On exam, Mr. Samuels was a pleasant young man, well developed and well nourished, and in no acute distress. His lungs were clear and heart was regular in rate and rhythm. No murmurs were heard. Examination of his right leg revealed a significant soft tissue mass over his distal femur on the right. The mass was tender. He did not have any knee effusion. I reviewed the labs and x-ray. His findings were consistent with osteosarcoma.
Given this information, which of the following statements is TRUE?

A) Mr. Samuels has a cancerous tumor originating in his knee joint.
B) Mr. Samuels has a soft tissue mass on his femur caused by a build-up of fluid in his knee.
C) Mr. Samuels has a soft tissue mass on the bottom part of his right femur.
D) Mr. Samuels has fluid build-up in his knee.
E) Mr. Samuels is experiencing an abnormal bone hardening on his right leg.