**Question:** Stafne cyst is found

A. Bicortical involvement of the mandible
B. Radiologically occult
C. In the anterior mandible
D. Associated with trauma

**Core Concept:** Stafne cyst is a rare, benign, intraosseous, radiolucent, and asymptomatic lesion of the mandible. It is named after the British maxillofacial surgeon, Sir Bernard Stafne, who first described it in 1942. These lesions are characterized by bicortical involvement of the mandible, which means they involve both the buccal (oral) and lingual (tongue-side) cortices of the mandible, and are radiologically occult, meaning they are not visible on plain radiographs.

**Why the Correct Answer is Right:** Stafne cyst is correctly identified as having bicortical involvement of the mandible because it extends into both the buccal and lingual cortices, which are the outer and inner layers of the mandible, respectively. The correct answer is not limited to radiological characteristics as options C and D suggest.

**Why Each Wrong Option is Incorrect:**

A. Option A is incorrect because Stafne cyst does not require trauma or any specific cause to develop. It is a spontaneous, idiopathic lesion that arises from the resorption of the cancellous bone in the mandible, causing a cystic space within the bone.

B. Option B is incorrect because Stafne cysts are not radiologically occult (invisible on plain radiographs) throughout their entirety. They may appear as radiolucent cysts, but they are not completely invisible on imaging studies.

C. Option C is incorrect because Stafne cyst can be found in various locations within the mandible, not just the anterior region. They can occur in other regions too, such as the posterior mandible or the ramus area.

D. Option D is incorrect because Stafne cyst is not always associated with trauma. Although it might be more common in patients with a history of trauma, it can develop spontaneously or following dental procedures without significant trauma.

**Clinical Pearl:** Stafne cyst is an important entity to recognize on radiographs, especially for oral surgeons and radiologists, as it can be confused with other radiolucent lesions in the mandible. While radiographs can be helpful in identifying the location of the cyst, clinical correlation with the patient's history and physical examination is crucial for making an accurate diagnosis.