Elsevier

The Journal of Pediatrics

Volume 129, Issue 6, December 1996, Pages 794-803
The Journal of Pediatrics

Cerebral gray matter and white matter volume deficits in adolescent girls with anorexia nervosa,☆☆,,★★

https://doi.org/10.1016/S0022-3476(96)70021-5Get rights and content

Abstract

OBJECTIVES: This study was undertaken to determine whether the increased cerebrospinal fluid (CSF) volumes found in anorexia nervosa (AN) are the result of differences in gray matter or white matter volumes or both. METHODS: Thirteen adolescent girls with AN who were receiving inpatient care at a tertiary-care university children's hospital and eight healthy female control subjects were studied by using magnetic resonance imaging. Images were processed by means of software developed to classify all pixels as either CSF, gray matter, or white matter. Pixels of each class were then summed across all sections. RESULTS: The AN group had larger total CSF volumes in association with deficits in both total gray matter and total white matter volumes. Lowest reported body mass index was inversely correlated with total CSF volume and positively correlated with total gray matter volume. Urinary free cortisol levels were positively correlated with total CSF volume and inversely correlated with central gray matter volume. CONCLUSIONS: These findings add support to the view that the brain abnormalities found in AN are in large part the result of the effects of the illness. The extent to which these differences in gray matter and white matter volumes are reversible with recovery remains to be established. (J Pediatr 1996;129:794-803)

Section snippets

Subjects

We studied 13 adolescent girls who were receiving inpatient treatment for AN at the Hospital for Sick Children in Toronto, Canada (mean age, 15.2 years; SD, 1.2 years; range, 13.3 to 17.0 years). Twelve of the subjects were white and one subject was of Asian origin; all subjects were right-handed. Patients were included if they met the criteria for AN, restricting type, as defined by the Diagnostic and Statistical Manual of Mental Disorders (third revised edition, 1987).12 Exclusion criteria

RESULTS

Descriptive data for the AN and control groups are shown in Table I.

. Clinical characteristics

Empty CellControl group (n = 8)AN group (n = 13)
Age at MRI (yr)15.4 ± 1.515.2 ± 1.2
13.4-17.313.3-17.0
Weight at MRI (kg)60.2 ± 10.240.8 ± 6.6*
42.8-74.232.4-54.4
Height at MRI (cm)161.7 ± 8.3161.6 ± 7.4
147.0-175.5151.0-180.0
BMI at MRI (kg/m2)22.9 ± 2.315.6 ± 1.7*
18.7-25.012.7-17.8
Lowest reported BMI (kg/m2)NA14.3 ± 1.7
10.5-17.2
Menarche (yr)12.4 ± 1.012.6 ± 0.8
11.0-14.011.0-13.5
Duration of amenorrhea (mo)NA9.5 ± 4.7

DISCUSSION

This study clearly established that structural brain abnormalities are present in adolescents with AN. These abnormalities include larger CSF volumes in ventricles and sulci and reduced volumes of both gray matter and white matter. Larger CSF volumes and smaller gray matter volumes were significantly correlated with the severity of weight loss (as reflected by BMI) and with increased cortisol production. These abnormalities are present within months of the patients' having fulfilled diagnostic

Acknowledgements

We acknowledge the assistance of Cynthia Kirsh, the staff of the Eating Disorders Program at the Hospital for Sick Children, and the staff of the MRI Centre at the Toronto Hospital-Western Division. We also thank Allan L. Reiss for making Brain Image (National Institute of Child Health and Human Development, Human Brain Project, HD31715) available to us and Edmond Chong for his assistance with all facets of image processing. This article was prepared with the assistance of the Hospital for Sick

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    From the Hospital for Sick Children; Clarke Institute of Psychiatry; The Toronto Hospital—Western Division; and the Departments of Pediatrics, Psychiatry, and Medical Imaging, University of Toronto School of Medicine, Toronto, Ontario, Canada

    ☆☆

    Supported by the Ontario Mental Health Foundation and the Deans Fund, University of Toronto School of Medicine.

    Reprint requests: Robert B. Zipursky, MD, Clarke Institute of Psychiatry, 250 College St., Toronto, ON M5T 1R8, Canada.

    ★★

    0022-3476/96/$5.00 + 0 9/21/75817

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