Acquired procedural dyscalculia associated to a left parietal lesion in a child

Child Neuropsychol. 1999 Dec;5(4):265-73. doi: 10.1076/0929-7049(199912)05:04;1-R;FT265.


We report the case of an 11-year-old boy who developed an anarithmetia in association with a left temporo-parietal tumor. His oral and written language were normal as well as his ability to judge magnitudes, process numbers, read operation signs and retrieve number facts. He had a specific difficulty in performing the procedures of subtraction, especially when it involved borrowing. These skills had been mastered before the present illness. This case shows that the components of calculation can be dissociated by brain lesions sustained during childhood, while arithmetic abilities are being acquired, thus reinforcing findings from developmental dyscalculias, that suggest a modular organisation of those skills during development.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Brain Neoplasms / diagnosis*
  • Brain Neoplasms / physiopathology
  • Brain Neoplasms / surgery
  • Child
  • Follow-Up Studies
  • Humans
  • Learning Disabilities / diagnosis*
  • Learning Disabilities / physiopathology
  • Male
  • Neoplasm Recurrence, Local / diagnosis
  • Neoplasm Recurrence, Local / physiopathology
  • Neoplasm Recurrence, Local / surgery
  • Neuropsychological Tests
  • Oligodendroglioma / diagnosis*
  • Oligodendroglioma / physiopathology
  • Oligodendroglioma / surgery
  • Parietal Lobe / physiopathology*
  • Parietal Lobe / surgery
  • Postoperative Complications / diagnosis
  • Postoperative Complications / physiopathology
  • Postoperative Complications / surgery
  • Problem Solving / physiology*
  • Reoperation