Trapezius muscle branch of the spinal accessory nerve without penetrating the sternocleidomastoid muscle as a pitfall in neck dissection: prevalence in a Japanese institution and a protocol for the prevention of iatrogenic injury.
Acta Otolaryngol
; 141(8): 825-829, 2021 Aug.
Article
em En
| MEDLINE
| ID: mdl-34384316
ABSTRACT
BACKGROUND:
The spinal accessory nerve (SAN) has several anatomical variations, which may be a pitfall in neck dissection (ND). These include the trapezius muscle branch (TB), which stems from the common trunk before entering the sternocleidomastoid muscle (SCM). AIMS/OBJECTIVES:
To investigate the prevalence of this variation and suggest a protocol for preventing unexpected injury of the TB in ND. MATERIALS ANDMETHODS:
We conducted a retrospective cohort study for 93 patients who had undergone neck dissection (117 sides) without resection of the SCM nor SAN. We recorded the division of the TB after and before penetration of the SCM by the common trunk (penetrating type TB [PTB]) and non-penetrating type TB [NPTB], respectively).RESULTS:
Among NDs, PTB and NPTB were observed in 61 (52%) and 56 (48%) sides, respectively. In the subgroup of 24 cases with bilateral ND, PTB/PTB, NPTB/NPTB, and NPTB/PTB were observed in eight (33%), nine (38%), and seven (29%) cases, respectively. The prevalence of PTB/NPTB did not differ according to age, sex, or laterality. CONCLUSIONS ANDSIGNIFICANCE:
NPTB is a common anatomical variation. The presence or absence of a branch from the common trunk must be initially checked to avoid unexpected damage to the TB.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Esvaziamento Cervical
/
Músculos Superficiais do Dorso
/
Músculos do Pescoço
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adult
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Aged
/
Aged80
/
Female
/
Humans
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Male
/
Middle aged
País/Região como assunto:
Asia
Idioma:
En
Revista:
Acta Otolaryngol
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Japão