NBME form 11 pt has thigh mass → MRI → biopsy → fibrosarcoma → Next best step?
A: CT Chest and ABD

Explanation states talks about how CT is vital step bc of the high hematogenous spread requires screening for mets

"The next step in the management of this patient with fibrosarcoma is to perform a CT scan of the chest and abdomen. Soft tissue sarcomas, which includes fibrosarcoma, are a heterogenous group of tumors derived from mesenchymal tissue such as skeletal or smooth muscle, adipose, or fibrous tissue. Malignant fibrous histiocytoma, now commonly referred to as undifferentiated pleomorphic sarcoma, is the most common type of soft tissue sarcoma. A gradually enlarging, painless mass within an extremity is the most common presentation of soft tissue sarcomas but they can develop in any location. In areas such as the thigh or retroperitoneum, the tumors can become very large prior to presentation. Metastasis is possible and tends to occur through hematogenous spread rather than lymphatic spread. Because of this, all patients with an initial diagnosis of soft tissue sarcoma should undergo evaluation for distant spread. CT scan of the chest evaluates for pulmonary spread, which is common because of the tumor's hematogenous method of metastasis, and CT scan of the abdomen evaluates for extrapulmonary metastases to the abdomen, pelvis, and retroperitoneum. With the information provided by the initial examination and the imaging, the stage of a soft tissue sarcoma is determined using the TNM staging system. Treatment of soft tissue sarcoma is based on tumor stage and includes both surgical and systemic therapies."

Also, AMBOSS discusses that you always do excision and radiation ± chemo, depending on staging, so I changed the format to make it easier to read and represent that
(of note AMBOSS says treatment info is beyond the depth of the exam, so I think this format should be fine)

Source: AMBOSS - https://next.amboss.com/us/article/3E0Sv3?q=sarcoma%20treatment#ohd0Up0