Wide open Anterior Fontanelle is found in following diseases except ________
**Core Concept**
A wide open anterior fontanelle is a clinical sign associated with various conditions, primarily due to alterations in intracranial pressure, bone growth, or cranial abnormalities. The anterior fontanelle is a normal anatomical structure in infants, but its size and closure can be influenced by various factors, including genetic, metabolic, or infectious conditions.
**Why the Correct Answer is Right**
A wide open anterior fontanelle is typically seen in conditions that cause increased intracranial pressure, such as hydrocephalus, or in conditions that affect bone growth, like rickets or osteogenesis imperfecta. In these cases, the fontanelle remains open due to the altered balance between intracranial pressure and the growth of the cranial bones. This can also be seen in conditions like Down syndrome, where there is a delay in fontanelle closure.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide enough information to determine the relationship between the disease and the wide open anterior fontanelle.
**Option B:** This option is incorrect because it is a condition that typically causes a delayed closure of the fontanelle, but it is not the exception to the wide open anterior fontanelle.
**Option C:** This option is incorrect because it is a condition that typically causes a delayed closure of the fontanelle, but it is not the exception to the wide open anterior fontanelle.
**Option D:** This option is incorrect because it does not provide enough information to determine the relationship between the disease and the wide open anterior fontanelle.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that a wide open anterior fontanelle can be a sign of increased intracranial pressure, delayed bone growth, or cranial abnormalities. A thorough examination and medical history are necessary to determine the underlying cause of an open fontanelle.
**Correct Answer:** D.