Ischemic Stroke with Protein S Deficiency Treated by Apixaban.

A 57-year-old man with atherosclerosis obliterans was admitted with sudden-onset sensory aphasia and right hemiparesis. Brain MRI revealed acute cerebral infarctions in the left temporal lobe and magnetic resonance angiography showed occlusion of the posterior branch of the left middle cerebral artery. Transesophageal echocardiography and ultrasonography respectively confirmed a patent foramen ovale and deep vein thrombosis in the bilateral femoral veins. Blood findings showed low protein S antigen, low protein S activity, and a missense mutation of the PROS 1 gene. The administration of apixaban 10 mg BID prevented ischemic stroke recurrence and decreased the deep vein thrombosis. These outcomes indicated that apixaban may be alternative to warfarin for the secondary prevention of ischemic stroke in a patient with a protein S deficiency.

Neurosarcoidosis Presenting with Prominent Periventricular White-Matter Lesions during Steroid Treatment for Autoimmune Hepatitis.

A 63-year-old woman under treatment of autoimmune hepatitis presented with headache, memory loss, and somnolence. Three months before admission, the patient experienced liver inflammation relapse after prednisolone (PSL) cessation. Consequently, PSL was resumed and then tapered. Cerebrospinal fluid (CSF) examination showed lymphocytic pleocytosis with remarkably reduced glucose and elevated angiotensin-converting enzyme and soluble interleukin-2 receptor levels. Magnetic resonance imaging (MRI) revealed prominent bilateral periventricular white-matter lesions, hydrocephalus, ischemic stroke with gadolinium enhancement of frontoparietal and basilar meninges on contrast-enhanced fluid-attenuated inversion recovery. Magnetic resonance angiography (MRA) showed narrowing of the bilateral middle cerebral arteries. Based on these findings, we diagnosed the patient with neurosarcoidosis. Re-increment of PSL improved the neurological symptoms, CSF findings, and abnormalities found on MRI and MRA. This case suggests that neurosarcoidosis may occur as a complication of some autoimmune diseases during immunotherapy administration.

[Case report: transient ischemic stroke caused by internal carotid artery occlusion due to compression by pituitary apoplexy and hemodynamic mechanism].

An 87-year-old blind man was admitted due to repeatedly disturbed consciousness and fever. Brain CT showed a pituitary tumor with a hematoma and an occlusive lesion of the right internal carotid artery. He experienced consciousness disturbance and left limb weakness with hypotension for a few minutes on the day of admission. We considered pituitary apoplexy caused adrenal failure with hypotension and transient ischemic attack (TIA) induced by a hemodynamic mechanism. An increased dose of hydrocortisone improved the fever and hypotension, and resolved consciousness disturbance. This is a unique example of TIA caused by the occlusive lesion of the internal carotid artery compressed as a result of pituitary apoplexy and a hemodynamic mechanism.

Recurrent Guillain-Barré and Fisher Syndromes in Two Patients Who Were Subsequently Diagnosed with Aplastic Anemia.

Guillain-Barré (GBS) and Fisher (FS) syndromes rarely recur and the characteristics of recurrence have not been fully elucidated. We describe the cases of 2 patients with GBS or FS that recurred more than twice and who were subsequently diagnosed with aplastic anemia. Case 1 was a 66-year-old man who was diagnosed with aplastic anemia 10 months before admission with limb ataxia and a sensory disturbance of the distal limbs that developed 3 days after an upper respiratory tract infection. He had a history of double vision with ataxia at the ages of 38 and 56 years. Case 2 was a 66-year-old woman who had been treated for aplastic anemia 1 year previously. She had a history of upper limb weakness after upper respiratory tract infections at the ages of 39 and 60 years. Tendon reflexes were absent in both patients at the time of onset and they were respectively diagnosed with FS and GBS and treated with intravenous immunoglobulin. No neurological deficits persisted. Blood findings showed that both were positive for IgG type ganglioside antibodies and HLA-DR15. The positive HLA-DR15 might have been associated with the recurrent GBS or FS and the development of aplastic anemia.