18º Congresso Brasileiro de Neurologia Infantil

Dados do Trabalho



Apresentação do caso

We report the case of a 5 year old boy, born prematurely by cesarean section at 34 weeks due to gestational complications. During pregnancy, his mother developed preeclampsia and was hospitalized. In the second gestational trimester, his ultrasound displayed polyhydramnios, mild bilateral cerebral ventriculomegaly and renal pyelectasis. When he was born (APGAR 5/8), he demanded resuscitation, underwent endoscopic gastrostomy and had multiple deformities, polycystic kidney disease and bilateral cryptorchidism. A transfontanellar ultrasound revealed mild ectasia of the supratentorial ventricular system (SVS) and the fourth ventricle. At 5 months, he was diagnosed with neuropsychomotor developmental delay (NPMD), laryngomalacia and global tactile sensory dysfunction. At 12 months, an MRI revealed global dilation of the SVS and a diffusely tapered corpus callosum. When he was 20 months old, macrocrania, malnutrition, poor eye contact and global hypotonia were reported and, 2 months later, he was diagnosed with Noonan Syndrome (NS), with a BRAF gene variant of zero frequency. At 2 years old, he began to have seizures and to display hearing hypersensitivity, stereotypies, irregular sleep, myoclonus, inability to sit or speak and unresponsiveness to calls. At age 4, he presented with spastic tretraparesis-axial hypotonia, persisting with seizures, dysphagia and sensory dysfunction.


The case describes complications of NS, a genetic disease that causes multiple malformations, short stature and heart disease, with less frequent digestive disorders, PMDN and cryptorchidism, except when the BRAF gene is altered. Furthermore, radiation, polyhydramnios and preeclampsia in the last trimester of pregnancy are major causes of premature birth, the latter being able to develop renal, cardiopulmonary and cerebral alterations in the fetus due to fetal growth restriction. This brain malformation can cause seizures, hydrocephalus, cerebral palsy and even autistic traits, conditions that are still corroborated by genetic factors.

Comentários finais

Given the variety of complications that NS causes to patients, this syndrome should undergo further analysis by the scientific community, since there are few studies about it. Furthermore, early diagnosis is still complicated, making it difficult to offer personalized treatment for their needs.

Referências (se houver)

Palavras Chave

Noonan Syndrome; Neurodevelopmental Disorders; Quadriplegia; Gastrointestinal Diseases; Cryptorchidism.

Fonte de Fomento (se houver)

Declaração de conflito de interesses de TODOS os autores

Eu Gabrielle Miranda Magalhães Pinto, autor responsável pela submissão do manuscrito intitulado ''Case report on the neurological complications associated with Noonan Syndrome'' e todos os coautores que aqui se apresentam, declaramos que não possuímos conflitos de interesse de nenhuma ordem.




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Gabrielle Miranda Magalhães Pinto, Déborah Araújo Leitão , Isabelle Diniz Melo, Isabel Bessa Leite, Samuel Lucas Almeida da Silva, Maria Clara Feitosa de Melo, João Marcelo Miranda Silveira dos Santos, Fabiane Elpídio de Sá Pinheiro, José Lucivan Miranda