Transplantation of autologous bone marrow mononuclear cells (BMMCs) has been proven safe in animal and human studies. However, there are very few studies in stroke patients. In this study, intra-arterial autologous BMMCs were infused in patients with moderate to severe acute middle cerebral artery infarcts. The subjects of this study included 20 patients with early or late spontaneous recanalization but with persistent deficits, in whom treatment could be initiated between 3 and 7 days after stroke onset. Mononuclear cells were isolated from bone marrow aspirates and infused at the proximal middle cerebral artery of the affected hemisphere. Safety analysis (primary endpoint) during the 6-month follow-up assessed death, any serious clinical events, neurological worsening with ≥ 4-point increase in National Institutes of Health Stroke Scale (NIHSS) scores, seizures, epileptogenic activity on electroencephalogram, and neuroimaging complications including new ischemic, hemorrhagic, or neoplastic lesions. Satisfactory clinical improvement (secondary endpoint) at 90 days was defined according to the pretreatment NIHSS scores as follows: modified Rankin Scale score of 0 in patients with NIHSS <8, modified Rankin Scale scores of 0-1 in patients with NIHSS 8-14, or modified Rankin Scale scores 0-2 in patients with NIHSS >14. Good clinical outcome was defined as mRS ≤2 at 90 days. Serial clinical, laboratory, electroencephalogram, and imaging evaluations showed no procedure-related adverse events. Satisfactory clinical improvement occurred in 6/20 (30%) patients at 90 days. Eight patients (40%) showed a good clinical outcome. Infusion of intra-arterial autologous BMMCs appears to be safe in patients with moderate to severe acute middle cerebral artery strokes. No cases of intrahospital mortality were seen in this pilot trial. Larger prospective randomized trials are warranted to assess the efficacy of this treatment approach.

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Most brainstem infarcts are caused by pontine strokes. When a bilateral pontine or brainstem stroke occurs, it can result in an image called the "heart appearance" sign. Sequential pontine strokes have not yet been described to cause the "heart appearance" sign. We report a case of sequential pontine strokes in a 47-yearold man with no relevant medical history. He presented with acute left-sided hemiparesis. Initial brain MRI showed a right-sided pontine infarction. Two weeks later, the patient's left side hemiparesis and dysarthria worsened, and he developed right-sided facial paralysis. The brain MRI showed a left-sided pontine infarction that looked like the "heart appearance" sign. The patient had a good recovery. This report highlights a case of atypical pontine stroke recurrence two weeks apart and discusses branch artery disease as a possible etiologic cause.