The role of CYP2C9 polymorphisms in phenytoin-related cerebellar atrophy.

PURPOSE: Phenytoin is known to be able to induce cerebellar atrophy in patients with epilepsy. It is also known that a CYP2C9 mutation (*2 or *3) reduces phenytoin metabolism by 25-50% and can increase the risk of phenytoin-related side effects. We examined the influence of CYP2C9 polymorphisms on total cerebellar volume and cerebellar gray and white matter volumes in patients with epilepsy taking phenytoin. METHODS: For the genotyping, 100 adult patients with documented epilepsy who had been taking phenytoin for >1 year were selected. From this group, we randomly selected 19 mutant individuals (MT group; CYP2C9*2 and *3) for a whole-brain volume measurement using MRI and 19 wild-type individuals (group WT; CYP2C9*1) with similar clinical and demographic characteristics to those in the MT group for comparison. Total intracranial volume measurements were used to normalize the acquired volumes, which were separated into gray matter volume, white matter volume, and total volume. RESULTS: The MT group exhibited a significant reduction in cerebellar white matter volume (p=0.002) but not in total cerebellar volume. CONCLUSION: Our study is the first to report evidence linking CYP2C9 polymorphism and a reduction in cerebellar volume in epileptic users of phenytoin.

Analysis of 621 death certificates issued from 1998 to 2007 in Curitiba, Brazil, mentioning epilepsy, epileptic seizures and/or status epilepticus.

PURPOSE: This study aims to study death records mentioning epilepsy, epileptic seizures and/or status epilepticus, in order to survey the population demographics and associated medical conditions, making it possible to outline the patient's profile. METHODS: A qualitative analysis was performed on the data gathered from death certificates from the Curitiba county records ranging from 1998 to 2007 bracket, in which epilepsy, seizure and/or status epilepticus were mentioned as the basic, intermediate, immediate or associated cause of death. RESULTS: Epilepsy was mentioned on 621 death cases in this 10-year-period. The deaths were mainly of male individuals (57.3%), Caucasian (71.6%), single (48.6%) and aged between 20 and 60 years (51.8%). Most of those who died were hospitalized patients (62.5%) and in 64.3% of the reported deaths, the patient received medical care during the event that led to his/her death. Epilepsy itself was considered to be the cause of death in 44%, followed by status epilepticus (9.7%). The most common intermediary and immediate causes were pulmonary infections (11.1%) and cardiac arrest (19.2%), respectively DISCUSSION: Hospitalized younger Caucasian males with epilepsy were the most common cases in this 10-year-period survey. Pulmonary infections were a common finding, but other aspects such as previous trauma, cerebrovascular disease or neoplasm were eventual associated factors. Public health and medical preventative measures can be planned based on the results of this study.

Trigeminal sensory neuropathy and facial contact dermatitis due to Anthurium sp.

BACKGROUND: Trigeminal sensory neuropathy (TSN) describes a heterogeneous group of disorders manifesting as facial numbness. OBJECTIVE: We report the case of a patient who had TSN associated with contact dermatitis due to Anthurium sp. METHOD/RESULTS: A 21-year-old female patient developed left hemifacial contact dermatitis after exposure to the anthurium plant. The patient had paresthesias and pain in the V2 and V3 divisions of the left trigeminal nerve. Eight days after its onset the dermatitis resolved, but numbness developed in the V2 and V3 divisions of the left trigeminal nerve. Cranial CT scan and MRI, as well as CSF and extensive work-up exams, were normal. After one month the symptoms disappeared completely. CONCLUSION: Anthurium sp, an indoor ornamental plant that contains calcium oxalate crystals, and can causes contact dermatitis. To our knowledge, this is the first report associating TSN with contact dermatitis due to Anthurium sp.

Trigeminal sensory neuropathy and facial contact dermatitis due to Anthurium sp

BACKGROUND: Trigeminal sensory neuropathy (TSN) describes a heterogeneous group of disorders manifesting as facial numbness. OBJECTIVE: We report the case of a patient who had TSN associated with contact dermatitis due to Anthurium sp. METHOD/RESULTS: A 21-year-old female patient developed left hemifacial contact dermatitis after exposure to the anthurium plant. The patient had paresthesias and pain in the V2 and V3 divisions of the left trigeminal nerve. Eight days after its onset the dermatitis resolved, but numbness developed in the V2 and V3 divisions of the left trigeminal nerve. Cranial CT scan and MRI, as well as CSF and extensive work-up exams, were normal. After one month the symptoms disappeared completely. CONCLUSION: Anthurium sp, an indoor ornamental plant that contains calcium oxalate crystals, and can causes contact dermatitis. To our knowledge, this is the first report associating TSN with contact dermatitis due to Anthurium sp.

INTRODUÇÃO: A neuropatia trigeminal sensitiva (NTS) representa um grupo heterogêneo de doenças, cuja manifestação clínica é a presença de dormência na região facial. OBJETIVO: Relatamos o caso de paciente que apresenta NTS associada com dermatite de contato (DC) devido à planta Anthurium sp. MÉTODO/RESULTADOS: Uma paciente com 21 anos desenvolveu DC na região hemi-facial esquerda, após exposição à planta Anthurium sp. Após a resolução do quadro de dermatite, a referida paciente apresentou dormência e parestesias no território do segundo e terceiro ramos do nervo trigêmeo esquerdo. Um mês após o início do quadro houve resolução completa dos sintomas. CONCLUSÃO: O Anthurium é uma planta ornamental que contém cristas de oxalato de cálcio, que podem causar DC. Para o nosso conhecimento este é o primeiro relato associando NTS e dermatite de contato devido à exposição ao Anthurium sp.