Occipital plagiocephaly

Deformation or lambdoid synostosis: I. morphometric analysis and results of unilateral lambdoid craniectomy

Mark Dias, David M. Klein, James W. Backstrom

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Between 1987 and 1992, 30 infants aged 1.4-13 months (mean 7.3 months) underwent unilateral lambdoid strip craniectomy at the Children’s Hospital of Buffalo for occipital plagiocephaly. Males outnumbered females (22:8) and right-sided occipital flattening was significantly more common than left-sided flattening (25:5). The deformity was noticed at an average age of 3.2 months; 16% of the infants had an asymmetry at birth. Positional preferences (a distinct tendency to lie preferentially on the back, in most cases with the head turned to the ipsilateral side) were described in 79% of infants for whom this information was available, and torticollis was present in 10%. Pre- and postoperative CT scans were analyzed using several morphometric measurements. Asymmetries were measured between the flattened and contralateral sides, both posteriorly and anteriorly, using a translucent grid placed over the CT slice showing maximum asymmetry. The average maximum asymmetry between the flattened and contralateral sides was 24% posteriorly and 16% anteriorly. Significant improvements were seen postoperatively, with both anterior and posterior asymmetries improving by an average of one third (p < 0.05). However, when compared with CT scans from a control group of infants without synostosis, the operated group showed persistent and significant asymmetries postoperatively. The morphometric measurements described allow an objective and reproducible means of assessing the results of various treatments for this disorder. The improvements following unilateral lambdoid craniectomy are difficult to interpret in isolation; we suggest that future efforts be directed toward similarly assessing the results of both nonoperative treatments such as positional changes and molding helmets, and more aggressive surgical treatments that have been advocated for this disorder.

Original languageEnglish (US)
Pages (from-to)61-68
Number of pages8
JournalPediatric Neurosurgery
Volume24
Issue number2
DOIs
StatePublished - Jan 1 1996

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Plagiocephaly
Craniosynostoses
Synostosis
Torticollis
Head Protective Devices
Buffaloes
Therapeutics
Head
Parturition
Control Groups

All Science Journal Classification (ASJC) codes

  • Pediatrics, Perinatology, and Child Health
  • Surgery
  • Clinical Neurology

Cite this

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title = "Occipital plagiocephaly: Deformation or lambdoid synostosis: I. morphometric analysis and results of unilateral lambdoid craniectomy",
abstract = "Between 1987 and 1992, 30 infants aged 1.4-13 months (mean 7.3 months) underwent unilateral lambdoid strip craniectomy at the Children’s Hospital of Buffalo for occipital plagiocephaly. Males outnumbered females (22:8) and right-sided occipital flattening was significantly more common than left-sided flattening (25:5). The deformity was noticed at an average age of 3.2 months; 16{\%} of the infants had an asymmetry at birth. Positional preferences (a distinct tendency to lie preferentially on the back, in most cases with the head turned to the ipsilateral side) were described in 79{\%} of infants for whom this information was available, and torticollis was present in 10{\%}. Pre- and postoperative CT scans were analyzed using several morphometric measurements. Asymmetries were measured between the flattened and contralateral sides, both posteriorly and anteriorly, using a translucent grid placed over the CT slice showing maximum asymmetry. The average maximum asymmetry between the flattened and contralateral sides was 24{\%} posteriorly and 16{\%} anteriorly. Significant improvements were seen postoperatively, with both anterior and posterior asymmetries improving by an average of one third (p < 0.05). However, when compared with CT scans from a control group of infants without synostosis, the operated group showed persistent and significant asymmetries postoperatively. The morphometric measurements described allow an objective and reproducible means of assessing the results of various treatments for this disorder. The improvements following unilateral lambdoid craniectomy are difficult to interpret in isolation; we suggest that future efforts be directed toward similarly assessing the results of both nonoperative treatments such as positional changes and molding helmets, and more aggressive surgical treatments that have been advocated for this disorder.",
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Occipital plagiocephaly : Deformation or lambdoid synostosis: I. morphometric analysis and results of unilateral lambdoid craniectomy. / Dias, Mark; Klein, David M.; Backstrom, James W.

In: Pediatric Neurosurgery, Vol. 24, No. 2, 01.01.1996, p. 61-68.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Occipital plagiocephaly

T2 - Deformation or lambdoid synostosis: I. morphometric analysis and results of unilateral lambdoid craniectomy

AU - Dias, Mark

AU - Klein, David M.

AU - Backstrom, James W.

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