ANSWER AND REASONINGB. Urgent IV antibiotics and mastoid source control with multidisciplinary discussion of anticoagulation
This is complicated otomastoiditis with septic lateral-sinus thrombosis: resuscitation, IV antibiotics, source control and neurosurgical/infectious-disease input take priority.
Why every option is right or wrong
A. Anticoagulate and defer source control: Anticoagulation is individualised and cannot substitute for eradication of the otogenic focus.
B. Urgent IV antibiotics and mastoid source control with multidisciplinary discussion of anticoagulation: Sepsis, intracranial venous thrombosis and perisinus pus require broad antimicrobial treatment and operative control of mastoid disease; anticoagulation depends on propagation, bleeding risk and specialist consensus.
C. Needle aspirate the jugular bulb through the neck: This is hazardous and does not control the mastoid/perisinus infection.
D. Observe because venous sinuses often recanalise spontaneously: Untreated septic thrombosis risks propagation, meningitis, embolic complications and raised intracranial pressure.
E. Perform lumbar puncture before antibiotics: Papilloedema raises concern for intracranial hypertension; lumbar puncture before imaging-based safety assessment is inappropriate.
What if the scenario changed?
If imaging showed only a non-occlusive filling defect without mastoid infection or sepsis, the balance would shift toward a primary cerebral-venous-thrombosis pathway.