**Core Concept**
Keratocysts, also known as odontogenic keratocysts, are a type of odontogenic jaw cyst that is characterized by its unique histopathological features and clinical behavior. They are known for their potential to recur after surgical treatment, making them a challenging condition to manage.

**Why the Correct Answer is Right**
Keratocysts have a high recurrence rate due to the presence of satellite cysts around the primary lesion, which can be left behind during surgical excision. This is in contrast to other types of jaw cysts, which have a lower recurrence rate. The high recurrence rate of keratocysts is a significant clinical concern, as it can lead to repeated surgeries and complications. The other features listed in the options are characteristic of keratocysts: they are indeed more common in the mandible, may be filled with thin, straw-colored fluid, and can cause expansion of the bone clinically.

**Why Each Wrong Option is Incorrect**
**Option A:** Keratocysts are indeed more common in the mandible, particularly in the posterior region. This is due to the higher concentration of dental lamina remnants and the presence of other odontogenic epithelial cells in this area.
**Option B:** Keratocysts may be filled with thin, straw-colored fluid, which is a characteristic feature of this type of cyst. This fluid is thought to be a result of the keratinization of the epithelial cells lining the cyst.
**Option D:** Expansion of the bone clinically is a common feature of keratocysts, which can lead to displacement of teeth and other surrounding structures. This expansion is due to the slow growth of the cyst, which can cause thinning of the cortical bone and eventual perforation.

**Clinical Pearl / High-Yield Fact**
Keratocysts are known for their high recurrence rate, which can be as high as 40-60%. This is due to the presence of satellite cysts around the primary lesion, which can be left behind during surgical excision. To minimize recurrence, it is essential to thoroughly excise the keratocyst, including any satellite cysts, and to use a surgical technique that allows for complete removal of the cyst lining.

**✓ Correct Answer: C. Low recurrence rate**