Mongoloid faces are seen in children suffering from?

AIIMS Raipur NO - 2019 (Shift-2)

Pathology & Genetics

Easy

Appeared in: AIIMS Raipur NO - 2019 (Shift-2)

Explanation

The term 'mongoloid facies' (more appropriately 'chipmunk facies') is a classic sign of severe Beta thalassemia (thalassemia major).
It results from massive expansion of the bone marrow in the facial bones and skull as the body tries to compensate for severe chronic anemia.
This ineffective erythropoiesis leads to characteristic deformities, including a prominent forehead (frontal bossing) and overgrown upper jaw (maxillary hypertrophy).
This process also causes the spleen and liver to enlarge (hepatosplenomegaly) due to extramedullary hematopoiesis.

Option A: Sickle cell anemia is primarily characterized by vaso-occlusive crises and hemolytic anemia. While bone marrow hyperplasia occurs, it does not typically lead to the severe, characteristic facial deformities seen in thalassemia major.
Option C: Megaloblastic anemia is due to a deficiency in vitamin B12 or folate, leading to impaired DNA synthesis and large, abnormal red blood cells. It does not involve the massive bone marrow expansion that causes bone deformities.
Option D: Aplastic anemia is defined by bone marrow failure, resulting in a deficiency of all blood cell types (pancytopenia). The marrow is hypocellular (empty), which is the opposite of the hypercellular, expanding marrow seen in thalassemia.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathognomonic signs of hematological disorders as background academic context rather than a clinical decision trigger.
Recognizing characteristic facial features is a key nursing assessment skill that can provide clues to an underlying systemic disease like thalassemia.
Nurses play a vital role in managing children with thalassemia, which includes administering blood transfusions, managing iron chelation therapy to prevent organ damage from iron overload, and providing psychosocial support.
What if? If a child with known thalassemia presents with a fever, the nurse must act quickly. These children, especially if they have had their spleen removed (splenectomy), are at high risk for overwhelming sepsis, and fever is a medical emergency.

How to Approach the Question

First, identify the key term in the question: 'Mongoloid faces'. Recognize this as a specific physical sign.
Recall or deduce the modern, more appropriate term for this sign, which is 'chipmunk facies'.
Consider the pathophysiology of each anemia listed in the options.
Ask yourself: Which of these conditions would cause the bone marrow to expand so much that it changes the shape of the face?
Rule out options where this mechanism doesn't fit. Aplastic anemia involves marrow failure (opposite). Megaloblastic anemia is a maturation problem, not a massive expansion problem. Sickle cell anemia causes different primary complications.
This leaves Beta thalassemia, where ineffective erythropoiesis and compensatory marrow hyperplasia are the central pathognomonic features leading to this sign.

Concept Tested & Keywords

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E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 649-651

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 719-721