Which facial anomaly may be present with holoprosencephaly?

Which facial anomaly may be present with holoprosencephaly?

• A. Anophthalmia
• B. Cyclopia
• C. Microcephaly
• D. Cleft lip

Answer: (B)

Holoprosencephaly disrupts early forebrain development in a way that also affects midline facial formation. When the midline patterning fails severely, the most striking facial sign is cyclopia—one eye with a single midline nose structure—reflecting a profound midline defect that often accompanies this brain condition. This makes cyclopia the best match for holoprosencephaly. Other facial anomalies like anophthalmia, microcephaly, or cleft lip can occur in different contexts, but they’re not as specifically tied to holoprosencephaly as cyclopia.

Holoprosencephaly disrupts early forebrain development in a way that also affects midline facial formation. When the midline patterning fails severely, the most striking facial sign is cyclopia—one eye with a single midline nose structure—reflecting a profound midline defect that often accompanies this brain condition. This makes cyclopia the best match for holoprosencephaly. Other facial anomalies like anophthalmia, microcephaly, or cleft lip can occur in different contexts, but they’re not as specifically tied to holoprosencephaly as cyclopia.