Cervicomedullary Cavernous Hemangioma presenting as Spinal Shock Syndrome and Dysfunction: A case report and review of related literature

INTRODUCTION@#Cavernomas in the brainstem and spinal cord are rare than their intracranial counterparts, and occurrences specifically at the cervicomedullary junction are infrequent. In this report, we present a case of a cervicomedullary cavernoma which manifested with spinal shock and dysfunction.@*CASE REPORT@#We describe a patient who exhibited spinal shock syndrome and a stepwise decline in spinal cord function. A 33-year-old woman initially complained of right upper arm and occipital referred pain from the atlantoaxial region. Three days later, she experienced bowel and urinary incontinence. Subsequently, quadriparesis and numbness affecting all limbs developed after one week, followed by life-threatening respiratory depression after nine days. Magnetic resonance imaging revealed a lesion in the cervicomedullary junction, identified as a cavernous hemangioma. During the hospital stay, fragmented reflex activity gradually returned. Upon follow-up, the bowel and urinary incontinence, motor impairments, and sensory impairments showed improvement.@*CONCLUSION@#The proposed mechanism for the mass effect of this cavernous malformation on the spinal cord at the cervicomedullary junction was likely due to pressure effects caused by shifting dynamics. Understanding the natural history of cavernous malformations, regional neurovascular anatomy, safe entrance points to the brainstem, routes to the craniovertebral junction from the base of the skull, and specific microsurgical procedures for their removal are necessary for appropriate treatment. However, these considerations should be balanced against knowledge of the associated hazards and treatment recommendations.

Neurogenic Shock: Clinical Management and Particularities in an Emergency Room

Neurogenic shock has a strong impact in traumatology. It is an important condition, associated with lesions in the neuraxis and can be medullar and/or cerebral. In the last years, its pathophysiology has been better understood, allowing a reduction in the morbimortality with more precise and efficacious interventions taking place in the emergency room. In this review article, the author presents the current aspects of the management of neurogenic shock, highlighting the neuroprotective measures that improve the outcome. Many pharmacologic interventions are still questionable and need more prospective studies to accurately assess their real value. The best moment for neurosurgical intervention is also debatable. Quite clearly, the initial proceedings in the emergency room are fundamental to guarantee the adequate conditions for neuroplasticity and neuronal rehabilitation.

Shock, diaschisis and von Monakow / Choque, diasquise e von Monakow

The concept of shock apparently emerged in the middle of the 18th century (Whyett) as an occurrence observed experimentally after spinal cord transection, and identified as "shock" phenomenon one century later (Hall). The concept was extended (Brown-Séquard) and it was suggested that brain lesions caused functional rupture in regions distant from the injured one ("action à distance"). The term "diaschisis" (von Monakow), proposed as a new modality of shock, had its concept broadened, underpinned by observations of patients, aiming at distinguishing between symptoms of focal brain lesions and transitory effects they produced, attributable to depression of distant parts of the brain connected to the injured area. Presently, diaschisis is related mainly to cerebrovascular lesions and classified according to the connection fibers involved, as proposed by von Monakow. Depression of metabolism and blood flow in regions anatomically separated, but related by connections with the lesion, allows observing diaschisis with neuroimaging.

O conceito de choque aparentemente surgiu em meados do século 18 (Whyett), como ocorrência observada experimentalmente após seção transversa da medula, e foi identificado como fenômeno de "choque" um século mais tarde (Hall). O conceito foi estendido (Brown-Séquard) e sugeriu-se que lesões cerebrais produziam ruptura funcional em regiões distantes à da lesão ("action à distance"). O termo "diásquise" (von Monakow), proposto como nova modalidade de choque, teve seu conceito ampliado, fundamentado em observações em pacientes. Visava distinguir sintomas de lesões cerebrais focais de efeitos transitórios que produziam, atribuíveis à depressão de partes distantes do cérebro conectadas à área lesada. Atualmente, diásquise é relacionada principalmente a lesões cerebrovasculares e classificada de acordo com as fibras de conexão envolvidas, como proposto por von Monakow. Depressão do metabolismo e fluxo sanguíneo em regiões anatomicamente separadas, mas relacionadas por conexões à lesão, permitem observar diásquise por meio de neuroimagem.