Lacunar cerebral infarction following endovascular interventions for phlegmasia cerulea dolens

Phlegmasia cerulea dolens is a rare presentation of deep venous thrombus treated with catheter directed thrombolysis and pharmacomechanical thrombectomy. This is the case of a 78-year-old woman who underwent catheter directed thrombolysis to treat phlegmasia cerulea dolens and subsequently developed left-sided hemiplegia and expressive aphasia in the setting of an international normalized ratio of 2.0. Further imaging revealed a lacunar infarct in the right thalamus with a middle cerebral artery distribution. Further workup revealed a patent foramen ovale. We highlight the unexpected enigmatic consequence from multimodal endovascular intervention, the consequence of long-term inferior vena cava filters.