Brain structure and function differences in monozygotic twins

Possible effects of breast cancer chemotherapy

Robert J. Ferguson, Brenna McDonald, Andrew Saykin, Tim A. Ahles

Research output: Contribution to journalArticle

172 Citations (Scopus)

Abstract

Purpose: Adjuvant chemotherapy has been associated with mild cognitive decline among a subset of breast cancer survivors. Late cognitive effects after chemotherapy can have a deleterious impact on survivor quality of life and functional health; however, the etiology of chemotherapy-related cognitive dysfunction remains unknown. Patients and Methods: We present a case of monozygotic twins who are discordant for breast cancer and chemotherapy exposure (ie, one twin contracted breast cancer and underwent chemotherapy, and the other had no breast cancer). As part of a larger study, each was evaluated with standardized, self-report measures of cognitive function, standard neuropsychological tests, and structural and functional magnetic resonance imaging (MRI). Results: Results indicated small differences in neuropsychological test performance but striking contrasts in self-reported cognitive complaints and structural and functional MRI images. Specifically, the twin who underwent chemotherapy had substantially more subjective cognitive complaints, more white matter hyperintensities on MRI, and an expanded spatial extent of brain activation during working memory processing than her nonaffected twin. Conclusion: This case illustrates possible physiologic mechanisms that could produce long-term cognitive complaints among chemotherapy recipients and help formulate hypotheses for further empirical study in the area of chemotherapy-associated cognitive dysfunction.

Original languageEnglish
Pages (from-to)3866-3870
Number of pages5
JournalJournal of Clinical Oncology
Volume25
Issue number25
DOIs
StatePublished - Sep 1 2007

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Monozygotic Twins
Breast Neoplasms
Drug Therapy
Brain
Neuropsychological Tests
Magnetic Resonance Imaging
Survivors
Adjuvant Chemotherapy
Short-Term Memory
Self Report
Cognition
Quality of Life
Health
Cognitive Dysfunction

ASJC Scopus subject areas

  • Cancer Research
  • Oncology
  • Medicine(all)

Cite this

Brain structure and function differences in monozygotic twins : Possible effects of breast cancer chemotherapy. / Ferguson, Robert J.; McDonald, Brenna; Saykin, Andrew; Ahles, Tim A.

In: Journal of Clinical Oncology, Vol. 25, No. 25, 01.09.2007, p. 3866-3870.

Research output: Contribution to journalArticle

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