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Question: A 46 year old woman undergoes resection of a large CPA meningioma via retrosigmoid approach. At the conclusion of the case there is mild oozing from some veins along the brainstem that are controlled with layers of surgicel. On postoperative day 3 the patient notices increasing headache, vomiting, and blurry vision. The incision is examined and appears to have ballotable fluid under the skin. What is the most likely diagnosis?

a) Communicating hydrocephalus

b) Non-communicating hydrocephalus

c) Post-craniotomy headache

d) Brainstem stroke

[Answer will be posted with next week's new question]

Answer to last week's question, “Yes Or Node” (December 28, 2020)

C - Core needle biopsy of an enlarged lymph node.