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Introduction: Scrub typhus is a potentially life-threatening but curable disease that can produce multi-organ failure. Neurological manifestations in scrub typhus have gained attention recently, where the entire neural axis except the myoneural junction can be involved. Although the pathogenesis of neurological involvement has not been established, immune-mediated mechanisms are suspected. This article reports the clinicopathological features of scrub typhus cases presenting several rare neurological and neuropsychiatric manifestations., Methods: Three hundred fifty-four serologically confirmed scrub typhus cases were admitted to the Department of General Medicine of Burdwan Medical College and Hospital (West Bengal, India) between May 2018 and May 2022. There were 50 patients who had predominantly neurological manifestations. Of these 50 cases, ten patients presented with extremely rare neurological manifestations., Results: We report 10 cases of scrub typhus (four men and six women) who presented with complex neurological pictures (posterior reversible encephalopathy syndrome, Opalski syndrome, parkinsonism, cerebellitis, isolated opsoclonus, acute transverse myelitis, myositis, polyradiculoneuropathy with cranial neuropathy, acute transient behavioral changes, and fibromyalgia). Immune-mediated mechanisms might have mediated the pathogenesis of most cases following scrub typhus infection., Conclusion: From a clinicopathological point of view, each case was unique in its presentation and treatment response. In any acute onset neurological disorders associated with febrile illness in the tropics or subtropics, scrub typhus infection should be included in the differential diagnosis, despite the absence of eschar and unremarkable neuroimaging findings. This otherwise curable disease may result in multi-organ dysfunction syndrome and death if the diagnosis is delayed., (Copyright © 2022. Published by Elsevier España, S.L.U.)

Crossed Wernicke's aphasia (CWA) following a stroke is a rare clinical phenomenon, particularly when associated with seizures. This case report presents a unique instance of crossed CWA accompanied by focal clonic cluster seizures affecting the left arm and face, with secondary generalization, in a monolingual Bengali-speaking patient following a right middle cerebral artery ischemic stroke. The patient, a 70-year-old male from rural India, presented with acute behavioral abnormalities and language impairment. He experienced left-sided focal motor-onset clonic seizures with impaired awareness, followed by fluent yet unintelligible speech, characterized by phonemic and semantic paraphasias, as well as neologistic jargon. Neuroimaging revealed a right parieto-occipital infarct. Although initially misdiagnosed and treated for acute psychosis, thorough clinical evaluation ultimately led to the diagnosis of CWA-a rare form of aphasia in a right-handed individual after a right hemisphere stroke. This case underscores the diagnostic challenges associated with stroke-related language disorders and highlights the importance of recognizing variations in language lateralization. Furthermore, the occurrence of CWA in a Bengali-speaking individual emphasizes the potential impact of linguistic and cultural factors on brain organization and language processing. This case also adds to the limited body of literature regarding the co-occurrence of post-stroke seizures and aphasia, particularly in atypical presentations such as CWA., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2024.)

Background: Scrub typhus, a mite-borne zoonosis caused by Orientia tsutsugamushi , is prevalent in the Asia Pacific region and presents with various neurological manifestations, including meningoencephalitis, polyneuropathy, and, rarely, cerebral venous sinus thrombosis (CVST)., Case Report: We report a unique case of CVST following scrub typhus meningoencephalitis in an 18-year-old pregnant woman from West Bengal, India. Her condition was complicated by fever, headache, neck stiffness, and altered sensorium. Laboratory tests revealed leukopenia and thrombocytopenia, while serologies for other infectious diseases were negative. Cerebrospinal fluid analysis was significant for lymphocytic pleocytosis and elevated protein, with a positive O tsutsugamushi -IgM assay. Treatment with azithromycin resulted in initial improvement; however, persistent headaches led to the discovery of CVST. The patient responded well to anticoagulation therapy with low molecular weight heparin and was discharged asymptomatic, with subsequent uneventful pregnancy and delivery., Discussion: Cerebral venous sinus thrombosis should be ruled out in pregnant women with refractory scrub typhus meningoencephalitis despite antibiotic therapy. Because scrub typhus is treatable with intravenous doxycycline and azithromycin, it should be considered in the workup of febrile patients with acute onset neurological disorders in the tropics or subtropics or travelers coming back from endemic areas, despite the absence of eschar and unremarkable neuroimaging findings., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2024.)

Introduction: Rapid correction of hyponatremia can result in osmotic demyelination syndrome (ODS). Sheehan's syndrome, a rare pituitary disorder caused by severe postpartum hemorrhage, is a potential cause of chronic hyponatremia. This case report describes a rare progression of extrapontine myelinolysis to central pontine myelinolysis, ultimately leading to ODS, following the correction of chronic hyponatremia associated with Sheehan's syndrome. Notably, this event occurred a decade after the initial postpartum hemorrhage due to placenta previa., Case Report: A 40-year-old woman from rural West Bengal, India, presented in a comatose state after five years of progressively worsening symptoms, including fatigue, gastrointestinal disturbances, cold intolerance, hair loss, and severe apathy, which had been misdiagnosed as psychogenic and treated with selective serotonin reuptake inhibitors. Two days before her admission to our hospital, she was diagnosed with a lower respiratory tract infection, dehydration, and severe hyponatremia (118 mEq/L) at a local private healthcare facility. Despite treatment with 3% sodium chloride and intravenous antibiotics, her condition deteriorated, prompting her transfer. At the time of hospitalization, the patient was diagnosed with chronic hyponatremia and hypopituitarism consistent with Sheehan's syndrome. This condition was attributed to a severe postpartum hemorrhage that occurred a decade prior, resulting from placenta previa. Initial MRI revealed extrapontine myelinolysis, and the correction of her "compensated" hyponatremia was identified as the cause of her neurological decline. Follow-up MRIs at 7 and 14 weeks confirmed the development of cavitating ODS., Discussion: This case highlights several key points: First, even a relatively gradual correction of hyponatremia can precipitate ODS, especially in patients with chronic conditions like Sheehan's syndrome. Second, it underscores the importance of meticulous management of chronic hyponatremia to prevent severe neurological outcomes. Third, it illustrates the diagnostic challenges of differentiating Sheehan's syndrome from primary psychiatric disorders, particularly in low-resource settings where the syndrome remains prevalent. The case also emphasizes the need for awareness among healthcare providers about the potential for severe complications arising from even minor corrections in serum sodium levels in such patients., Competing Interests: The author(s) received no financial support for the research, authorship, and/or publication of this article., (© The Author(s) 2024.)

Background: Scrub typhus is an acute febrile infectious disease highly prevalent in the Asia Pacific region, often referred to as the "tsutsugamushi triangle." This mite-borne rickettsial zoonosis is caused by Orientia tsutsugamushi , an intracellular Gram-negative organism that primarily targets endothelial cells. The resulting vasculitis leads to multisystem involvement. In terms of neurological manifestations, meningoencephalitis is the most common presentation of scrub typhus. Other frequent neurological manifestations include cranial nerve paresis, transverse myelitis, and polyneuropathy. Status epilepticus, while reported, is a rare presenting feature of this infection. Although scrub typhus has been documented to present as limbic encephalitis, there have been no previous descriptions in the literature of neuroradiological patterns affecting the basal ganglia or extra-limbic cortices in this condition., Case Report: We report a case of a 23-year-old previously healthy woman who presented with scrub typhus meningoencephalitis. The condition manifested as encephalitis with involvement of the basal ganglia and extra-limbic cortices. She presented with generalized convulsive status epilepticus, which was complicated by cortical multifocal myoclonus., Discussion: Scrub typhus can be a significant diagnostic challenge, potentially presenting with generalized convulsive status epilepticus and mimicking both clinical and radiological features of arboviral encephalitides, such as those caused by West Nile and Japanese encephalitis viruses. Furthermore, as demonstrated in this case, its radiological presentation can resemble that of autoimmune encephalitis. Given that scrub typhus is amenable to treatment with antibiotics, such as doxycycline and azithromycin, which do not increase seizure risk, it should be considered in the differential diagnosis for patients presenting with seizures or encephalitis, especially in endemic areas., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2024.)

A 40-year-old male farmer from rural West Bengal, India, presented with fever, headaches, seizure, eschar, and palsy of left cranial nerves VII, VIII, IX, and X as a rare clinical manifestation of scrub typhus. Positive IgM enzyme-linked immunosorbent assay tests in serum and cerebrospinal fluid confirmed the diagnosis, with brain magnetic resonance imaging showing meningoencephalitis findings. Treatment with steroids and doxycycline led to neurological improvement. This case highlights the need for heightened clinician awareness towards early detection of scrub typhus's atypical presentations to ensure timely and effective treatment.

Background: Dengue neuro-infection can present with symptoms ranging from mild to severe. Atypical presentations, such as expanded dengue syndrome, pose diagnostic and therapeutic challenges. Neuroimaging findings, particularly the "double-doughnut" sign on brain magnetic resonance imaging (MRI), have emerged as one of the most valuable aids in diagnosing complex cases of central nervous system infection by dengue virus., Case Presentation: We report the case of a 35-year-old female from rural West Bengal, India, with expanded dengue syndrome. The patient presented with fever, headaches, body aches, and sudden disorientation over minutes, which progressed to a coma. Neurological examination revealed profound unconsciousness and nuchal rigidity. Laboratory findings were consistent with dengue infection, including altered liver and pancreatic enzyme levels. The diagnosis was facilitated by identifying the "double-doughnut" sign on the brain MRI, which suggested dengue encephalitis. This finding and clinical and serological evidence guided the treatment strategy., Discussion: The "double-doughnut" sign, though not exclusive to dengue encephalitis, proved crucial in this case, aiding in differentiating from other causes of encephalitis. Recognition of this sign can be pivotal in diagnosing expanded dengue syndrome, facilitating timely and appropriate intervention, and improving patient outcomes. This case also underscores the importance of considering dengue in the differential diagnosis of encephalitis, especially in endemic areas. Also, this case's excellent outcome (both clinically and radiologically) was noteworthy., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2024.)

Background: Hypercalcemia-induced posterior reversible encephalopathy syndrome (PRES) is a rare entity primarily associated with iatrogenic vitamin D/calcium overdose, malignancy, or, infrequently, primary hyperparathyroidism., Case Report: We present a novel case of an adult male from rural India who experienced recurrent acute pancreatitis caused by hypercalcemia with concurrent manifestation of PRES. Diagnostic evaluation revealed markedly elevated serum calcium levels and parathyroid hormone concentrations, consistent with primary hyperparathyroidism. Imaging studies identified a parathyroid adenoma near the right thyroid lobe, subsequently surgically excised., Discussion: This case underscores the importance of considering primary hyperparathyroidism as an underlying cause of PRES, especially in the absence of acute arterial hypertension or autonomic dysfunction. Early recognition and intervention are essential in mitigating the morbidity and mortality of PRES., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2023.)