Cleft tongue and clefting of mandibular alveolar process seen in:
**Core Concept**
The question is testing the association between a specific genetic disorder and its characteristic oral manifestations. The underlying principle involves the understanding of a genetic mutation affecting craniofacial development.
**Why the Correct Answer is Right**
The correct answer is associated with Van der Woude syndrome, a rare genetic disorder characterized by cleft lip and/or palate, cleft tongue, and clefting of the mandibular alveolar process. This condition is caused by mutations in the IRF6 gene, which plays a crucial role in the development of the lip, tongue, and palate. The IRF6 gene regulates the expression of other genes involved in cell signaling pathways that control cell migration and differentiation during embryonic development.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not directly related to the characteristic oral manifestations of Van der Woude syndrome.
**Option B:** This option is also not associated with the specific oral features of Van der Woude syndrome.
**Option C:** This option is incorrect as it is not a known genetic disorder associated with cleft tongue and mandibular alveolar process.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that Van der Woude syndrome is an autosomal dominant disorder, meaning that a single copy of the mutated gene is enough to cause the condition. This is in contrast to other genetic disorders that may require two copies of the mutated gene (one from each parent) to manifest.
**Correct Answer: C. Van der Woude syndrome**