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[Infantile spinal amyotrophy with atypical course: report of 2 cases]
L M Ferreira1, U C Reed, L J Silva
1Divisão de Clínica Neurológica, Hospital das Clínicas (HC) da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Brasil.
Insights
This study presents two pediatric cases of spinal muscular atrophy (SMA) with unusual disease progression, diagnosed using electromyography (EMG). The findings highlight the diverse clinical presentations of SMA in children.
Area of Science:
- Neurology
- Genetics
- Pediatrics
Background:
- Spinal muscular atrophy (SMA) is a rare genetic neuromuscular disorder characterized by progressive muscle weakness and atrophy.
- Accurate diagnosis and classification are crucial for understanding SMA's diverse clinical spectrum and patient outcomes.
Observation:
- Two pediatric cases of SMA with atypical disease progression were diagnosed using electromyography (EMG).
- The first case involved a 10-year-old female with predominantly distal muscle weakness and atrophy.
- The second case presented as a rapidly progressive tetraparesis in a 7-year-old female, leading to death within 10 months.
Findings:
- The observed clinical manifestations in both patients deviated from typical SMA progression patterns.
- EMG findings were instrumental in diagnosing these atypical SMA cases.
- The study discusses established SMA classifications and compares the patients' clinical courses with existing literature.
Implications:
- These cases underscore the importance of considering atypical presentations in infantile spinal muscular atrophy diagnosis.
- Recognizing varied clinical trajectories aids in better patient management and prognostic assessments.
- Further research into SMA's phenotypic variability can refine diagnostic criteria and therapeutic strategies.
Abstract:
The authors report two cases of infantile spinal muscular atrophy with atypical evolution diagnosed by means of EMG findings. The first one is a 10 years-old female child who has showed a distal predominium of the muscle weakness and atrophy. The second patient, a 7 year-old female child, has manifested within a period of 4 months a rapidly progressive tetraparesis that culminated in death after 10 months. The authors present the most accepted classifications of the illness and discuss the clinical manifestations of the two patients aiming to characterize the clinical forms, in accordance to the literature.