**Core Concept**
Maffucci syndrome is a rare, genetic disorder characterized by the presence of multiple osteochondromas (benign bone tumors) and hemangiomas (benign blood vessel tumors) due to mutations in the IDH1 or IDH2 genes.

**Why the Correct Answer is Right**
Maffucci syndrome involves the abnormal growth of cartilage and bone, leading to the formation of multiple osteochondromas. These tumors are typically found near the joints and can cause pain, deformity, and limited mobility. The presence of hemangiomas, which are benign vascular tumors, is a key feature of Maffucci syndrome and can sometimes undergo malignant transformation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incorrect because Maffucci syndrome is not primarily characterized by the presence of neurofibromas, which are associated with neurofibromatosis type 1. **Option B:** Maffucci syndrome is not a variant of Ollier disease, although both conditions involve the growth of multiple osteochondromas. **Option C:** This option is incorrect because Maffucci syndrome is not a form of multiple endocrine neoplasia (MEN), which is a group of disorders characterized by the growth of tumors in multiple endocrine glands.

**Clinical Pearl / High-Yield Fact**
Maffucci syndrome is often associated with an increased risk of developing chondrosarcomas, which are malignant bone tumors that arise from cartilage. This is an important consideration for patients with Maffucci syndrome, as regular monitoring and surveillance for these tumors are essential.

**Correct Answer: C. Maffucci syndrome is characterized by multiple osteochondromas and hemangiomas due to IDH1 or IDH2 gene mutations.**