NBME 23 Densely packed capillaries (NBME Answers)

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NBME 23 Answers

nbme23/Block 2/Question#27 (reveal difficulty score)
A 3-month-old girl is brought to the ...
Densely packed capillaries 🔍 / 📺 / 🌳 / 📖
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submitted by ∗mousie(272)

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A hemangioma is a type of benign (non-cancerous) tumor in infants. This abnormal cluster of small blood vessels appears on or under the skin, typically within one to three weeks after birth. - www.childrenshospital.org Hemangioma is a BV/capillary birthmark

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sympathetikey Probably a Strawberry Hemangioma since she's a baby +10

meningitis Can anyone explain what is option A? +2

redvelvet bc, it's a benign "capillary" hemangioma, we can see "thin-walled blood vessels with narrow lumens filled with blood and separated by connective tissue". It sounds similar to "arterioles in a fibrous stroma" but it's capillary. +1

peridot @meningitis I believe option A ("arterioles in a fibrous stroma") is describing an angiofibroma. The name angiofibroma already tells you that there is some component of fibrotic tissue involved, whereas in this case of strawberry hemangioma, the name tells you that it's more like pure blood vessels (capillaries in this case). +5

madamestep @periodt Also those are pretty much always going to be in teen boys with recurrent nosebleeds! +

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submitted by ∗mutteringly(33)

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Answer is not C) Cavernous vascular spaces because that is specifically talking about cavernous hemangiomas - often asymptomatic but involving deeper tissues of body, primarily in liver (abdominal pain and RUQ fullness) and brain (can cause intraparenchymal hemorrhage).

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