RESUMOAvaliaram-se 55 cães com distúrbios neurológicos e verificou-se a ocorrência de afecções neurológicas de origem central, detectadas pela ultra-sonografia transcraniana (USTC). Vinte e nove (52,9%) animais apresentaram diagnóstico compatível com hidrocefalia, e destes, 16 (55,1%) eram fêmeas e 15 (51,7%) tinham menos de dois anos. Quinze (27,3%) cães apresentaram lesões focais, quatro (7,2%), alterações difusas e quatro (7,2%) apresentavam imagens sugestivas de lissencefalia; em três (5,4%) não foram detectadas alterações pela USTC. A hidrocefalia foi o distúrbio neurológico de origem central mais freqüente e a USTC é uma alternativa viável para auxiliar na rotina clínica veterinária como ferramenta diagnóstica na detecção de alterações morfológicas e estruturais do cérebro no cão.Palavras-chave: cão, ultra-sonografia, cérebro ABSTRACT In this work, 55 dogs with neurologycal disorder were examined and central neurological affections were detected by transcranial ultrasonography (TCUS

Transcranial duplex Doppler ultrasound was performed in 32 conscious dogs presenting ventriculomegaly detected in B-mode, obtaining measures of lateral ventricles and resistance parameters of main cerebral arteries before and after 30 days of clinical treatment. The animals were distributed divided in two groups: group 1, dogs that presented remission or decrease of the neurological signs of the disease after clinical therapy; and group 2, dogs that displayed worsening of the neurological signs or clinical stability. The data were all presented in tables and were submitted to paired t test and to logistic regression models to evaluate the influence of the RI reduction on both groups. There was no significant influence of the variables in the B-mode. After the treatment, the mean resistive index (RI) was significantly lower for the group that presented clinical improvement. There was no significant difference of the mean RI reduction for the same artery when the right and left sides were compared. It could be concluded that transcranial duplex Doppler ultrasound is a method of cerebral hemodynamic assessment able to monitor more precisely the treatment of hydrocephalus in dogs and verify the responses.Keywords: dog, Doppler ultrasonography, neurology, hydrocephalus RESUMO Foi realizada a ultrassonografia duplex Doppler transcraniana em 32 cães, conscientes, que apresentavam ventriculomegalia previamente detectada ao exame modo-B, para obter as medidas dos ventrículos laterais e os parâmetros de resistência das artérias cerebrais antes e depois de 30 dias de tratamento clínico. Os animais foram distribuídos em dois grupos: 1 -formado por cães que apresentaram remissão ou diminuição dos sinais clínicos após tratamento; 2 -por cães que apresentaram piora dos sinais neurológicos ou estabilidade do quadro clínico. Todos os dados foram dispostos em tabelas e submetidos ao teste t pareado e a modelos de regressão logística para avaliar a influência da redução do índice de resistividade (IR). Não foi observada influência das variáveis

Cerebrovascular accidents (CVA) are important causes of neurological clinical signs in dogs. The objective of this work was to describe concurrent diseases and ultrasonographic features in dogs with CVA confirmed through postmortem evaluation. All medical records of transcranial Doppler ultrasonography (TCDUS) examinations performed in 512 dogs between 2007 and 2009 were reviewed, searching for history and clinical diagnosis, as well as sonographic and histological results. Forty-two dogs were selected, showing acute onset of clinical signs with no progressive focal cerebral dysfunction and diagnosis of cerebrovascular disease confirmed at necropsy. Concurrent diseases and conditions were: cerebral amyloid microangiopathy (33%), endocrinopathies (31%), coagulopathy (24%), Schnauzer hyperlipemia (7%) and unknown (5%). The relation between sonography and histology results indicated 100% sensitivity and 90% specificity for focal lesion detection. A diffuse decrease in echogenicity was related to inflammatory diseases and/or edema with 62% sensitivity. A diffuse increase in echogenicity has 100% sensitivity and was usually related to aging changes. This study showed the occurrence of coexisting diseases with CVA and sonographic features of these conditions in small breed dogs.Keywords: canine, ultrasonography, neurology, Doppler RESUMO O diagnóstico de acidente vascular cerebral (AVC) em cães é considerado importante causa de sinais clínicos neurológicos. Este trabalho objetivou descrever as doenças concomitantes e os aspectos sonográficos em cães com AVC confirmados por meio da avaliação post-mortem. Foram revisados os exames de ultrassonografia Doppler transcraniana (USDTC) realizados em

Chondromyxoid fibroma is rare cartilaginous tumor, accounting for 0.5% of all primary bone tumors and 2% of benign bone tumors. Areas of aneurysmal bone cysts (ABC) may be found within CMF in 8.6% of cases. A 20-year-old man presents pain due to a mass on iliopubic ramus that was diagnosed as an aneurysmal bone cyst arising from a chondromyxoid fibroma. This case confirms the rare association between aneurysmal bone cyst and chondromyxoid fibroma. Although aneurysmal bone cyst is more frequently associated with highly vascularized tumors, it is important to consider the diagnosis in the presence of chondromyxoid fibroma. Keywords: Chondromyxoid fibroma; scecondary aneurysmal bone cyst; iliopubic ramus