**Core Concept**
In situ ablation of liver secondaries involves the use of various modalities to destroy liver tumors without surgical resection. This approach aims to preserve liver function while eliminating cancerous tissues. The modalities used for in situ ablation of liver secondaries include thermal ablation techniques, such as radiofrequency ablation (RFA) and microwave ablation (MWA), as well as other minimally invasive methods.

**Why the Correct Answer is Right**
Radiofrequency ablation (RFA) and microwave ablation (MWA) are widely used for in situ ablation of liver secondaries due to their ability to generate heat, causing coagulative necrosis of the tumor cells. RFA uses electrical energy to produce heat, while MWA uses microwave energy to generate heat within the target tissue. Both modalities rely on the principle of heat transfer to destroy cancerous cells. Another modality, cryoablation, uses extreme cold to destroy tumor cells, and is also used for in situ ablation of liver secondaries.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a recognized modality for in situ ablation of liver secondaries. However, it is possible that some newer or experimental technology might share this name.
**Option B:** This option is not a recognized modality for in situ ablation of liver secondaries. The actual treatment modality is likely a misspelling or variation of a known technique.
**Option C:** This option, Stereotactic Body Radiation Therapy (SBRT), is not typically considered an in situ ablation modality for liver secondaries. While it can be used to treat liver tumors, it is a form of radiation therapy that uses multiple beams to deliver high doses of radiation to the tumor.

**Clinical Pearl / High-Yield Fact**
When considering in situ ablation of liver secondaries, it is essential to evaluate the tumor's size, location, and proximity to vital structures to determine the most suitable modality. The American College of Radiology (ACR) provides guidelines for the use of thermal ablation techniques in the treatment of liver tumors.

**Correct Answer:** C.