Fenômeno de Marcus Gunn: diagnóstico diferencial das ptoses palpebrais na criança

Torres, Marcia Regina Fantoni; Calixto, Nassin; Oliveira, Luiz Roberto de; Steiner, Sílvia A.; Iscold, Amarilis M.

doi:10.1590/s0021-75572004000400015

Cited by 4 publications

(8 citation statements)

References 11 publications

(11 reference statements)

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“…Although usually associated with good prognosis, it may be accompanied by ophthalmological complications such as strabismus or amblyopia, and some cases may need surgical correction, with early diagnosis and adequate follow-up being fundamental in the correct approach of these patients. 2,3,6,8,9 We emphasize the importance of child examination, particularly the inspection not only at rest but also when eating or crying, thus facilitating the diagnosis of this entity.…”

Section: Resultsmentioning

confidence: 99%

First Sight Diagnosis

Silva

Vieira

Brito

et al. 2019

Clin Pediatr (Phila)

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Section: Resultsmentioning

confidence: 99%

First Sight Diagnosis

Silva

Vieira

Brito

et al. 2019

Clin Pediatr (Phila)

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“…A literatura relata que a maior prevalência de ambliopia nos portadores de ptose congênita deve ser devido a maior prevalência de fatores ambliogênicos encontrados nestes pacientes (11) . O fenômeno de Marcus Gunn é descrito como sendo responsável por 2 a 13% das ptoses congênitas (2) . Neste trabalho, este fenômeno foi encontrado em 9,5% dos casos e, em outros trabalhos epidemiológicos, foram descritos 1,2% (12) e 5,3%.…”

Section: Discussionunclassified

“…Sua elevação é dada principalmente pelo mús-culo elevador da pálpebra superior (MEPS), inervado pelo terceiro par craniano. Atuam como coadjuvantes nessa função o músculo de Müller e o músculo frontal (1,2) . Ptose ou blefaroptose é o resultado da disfunção isolada ou conjunta dos músculos que atuam na elevação da pálpebra, resultando na queda da margem palpebral para uma posição mais baixa que o normal, na posição primária do olhar (1)(2)(3) .…”

Section: Introductionunclassified

“…Atuam como coadjuvantes nessa função o músculo de Müller e o músculo frontal (1,2) . Ptose ou blefaroptose é o resultado da disfunção isolada ou conjunta dos músculos que atuam na elevação da pálpebra, resultando na queda da margem palpebral para uma posição mais baixa que o normal, na posição primária do olhar (1)(2)(3) . Existem diversas classificações para ptoses, sendo que a divisão em congênitas ou adquiridas é a mais utilizada (3,4) .…”

Section: Introductionunclassified

“…Na maioria das ptoses congênitas verdadeiras o defeito é produzido por distrofia do MEPS, e apresenta-se como uma condição isolada ou associada a outras alterações congênitas como a blefarofimose (3)(4)(5)(6) . Outros mecanismos, embora menos comuns, também podem causar ptose congênita, como os defeitos neurogênicos que ocorrem na síndrome de Horner congênita e no fenômeno de Marcus Gunn (2,4,6) . As experiências visuais na infância têm grande influência no desenvolvimento das vias visuais, particularmente do córtex visual, que é rudimentar no recém-nascido.…”

Section: Introductionunclassified

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Perfil epidemiológico dos pacientes com ptose congênita no hospital regional de São José

Júnior¹,

Branco²

2011

Rev. bras.oftalmol.

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Incidence and clinical profile of Marcus Gunn jaw-winking phenomenon in congenital ptosis at a tertiary eye hospital in western Uttar Pradesh, India

Chaurasiya¹,

Alam²,

Agarwal³

et al. 2023

LAJO

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Objectives: The objectives of this study were to report the hospital-based incidence and a rare case series of Marcus Gunn jaw-winking phenomenon (MGJWP) in patients with congenital ptosis Material and Methods: This was a retrospective non-interventional case series. The medical records of all patients diagnosed with MGJWP over the past 3.5 years were retrieved from the electronic medical record. Patients with documented evidence of the presence of ptosis with MGJWP were included and analyzed for visual acuity, the presence of squint and amblyopia, and the presence of other aberrant regenerations. Results: A total of 198 patients were diagnosed with congenital ptosis, out of which 23 (11.6%) patients had MGJWP along with congenital ptosis and 175 (84.4%) patients have congenital ptosis without MGJWP. There were 12 males and 11 females. The mean age at presentation was 10.35 ± 8.4 years (range from 2 to 28 years). All the patients presented unilateral MGJWP. The right eye was involved in seven patients (30.4%) and the left eye in 16 patients (69.5%). Most of the patients had observed the onset of MGJWP by parents since birth. Visual acuity was measured by Snellen’s distance acuity chart in 15 patients. Eight patients were preverbal, and their vision was assessed by the fixation pattern, which was central, steady, and maintained. Nine patients (39.1%) were emmetropic, seven patients (30.4%) had astigmatism, and seven patients were amblyopic in the affected eye. Strabismus was noted in nine patients (39.1%) in this study. Monocular elevation deficiency was noted in five patients, three patients have exotropia, and one had hypotropia. Conclusion: All the patients had a mild form of MGJWP with no intervention required in any of the cases. The hospital-based incidence of MGJWP in congenital ptosis is 11.6%. Most of the patients had observed the onset of MGJWP by their parents since birth.

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Fenômeno de Marcus Gunn: diagnóstico diferencial das ptoses palpebrais na criança

Cited by 4 publications

References 11 publications

First Sight Diagnosis

First Sight Diagnosis

Perfil epidemiológico dos pacientes com ptose congênita no hospital regional de São José

Incidence and clinical profile of Marcus Gunn jaw-winking phenomenon in congenital ptosis at a tertiary eye hospital in western Uttar Pradesh, India

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