Nokea
An infant is born with a firm mass over the chest with a central area of purpura and a 'halo' around it. An ultrasound reveals a high-flow lesion. What is the most likely diagnosis?
Correct Answer: C
Rationale: The most likely diagnosis in this case is congenital hemangioma (Choice C). This is because the description of a firm mass over the chest with central purpura and a 'halo' suggests a rapidly involuting congenital hemangioma. The high-flow lesion seen on ultrasound is characteristic of this type of hemangioma.
Choice A (Fibrosarcoma) is incorrect as fibrosarcoma typically presents differently and does not typically have a central area of purpura. Choice B (Infantile hemangioma) is incorrect as infantile hemangiomas are not usually present at birth and do not typically have a 'halo' appearance. Choice D (Capillary malformation) is incorrect as capillary malformations do not usually present as a firm mass with central purpura and a 'halo'.
In summary, the key features described in the question point towards a diagnosis of congenital hemangioma, making Choice C the most likely