Abstract
Hypothalamic hamartomas (HHs) are rare developmental malformations consisting of mixed neurons and glial cells, usually unilaterally attached to the tuber cinereum or mammillary bodies. We report on two patients, both suffering from pharmacoresistant epilepsy, behavioural and cognitive disturbances. Ictal and interictal electroencephalographic (EEG) abnormalities appeared bilaterally and multiregionally with right-sided preponderance. Magnetic-resonance imaging (MRI) revealed independent bilateral hypothalamic hamartomas, more prominently on the right side. Endoscopic surgery of the right HH was performed in each patient, resulting in a significant seizure reduction in both cases. To the best of our knowledge, there are no other reports of independent bilateral HHs in the literature.
References
Arita K, Ikawa F, Kurisu K, Sumida M, Harada K, Uozumi T, Monden S, Yoshida J, Nishi Y (1999) The relationship between magnetic resonance imaging findings and clinical manifestations of hypothalamic hamartoma. J Neurosurg 91:212–220
Boyko OB, Curnes JT, Oakes WJ, Burger PC (1991) Hamartomas of the tuber cinereum: CT, MR, and pathological findings. AJNR Am J Neuroradiol 12:209–314
Coons SW, Rekate HL, Prenger EC, Wang N, Drees C, Ng YT (2010) The histopathology of hypothalamic hamartomas: study of 57 cases. J Neuropathol Exp Neurol 66:131–141
Delalande O, Fohlen M (2003) Disconnecting surgical treatment of hypothatamic hamartoma in children and adults with refractory epilepsy and proposal of a new classification. Neurol Med Chir (Tokyo) 43:61–68
Freeman JL, Zacharin M, Rosenfeld FV (2003) The endocrinology of hypothalamic hamartoma surgery for intractable epilepsy. Epileptic Disord 5:239–247
Freeman JL, Coleman LT, Wellard RM, Kean MJ, Rosenfeld JV, Jackson GD, Berkovic SF, Harvey AS (2004) MR Imaging and spectroscopic study of epileptic hypothalamic hamartomas: Analysis of 72 cases. AJNR AM J Neuroradiol 25:450–462
Kerrigan JF, Ng YT, Chung S, Rekate HL (2005) The hypothalamic hamartoma: a model of subcortical epileptogenesis and encephalopathy. Semin Pediatr Neurol 12:119–131
Kerrigan JF, Ng YT, Prenger E, Krishnamoorthy KS, Wang NC, Rekate HL (2007) Hypothalamic hamartoma and infantile spasms. Epilepsia 48:89–95
Munari C, Kahane P, Francione S, Hoffmann D, Tassi L, Cusmai R, Vigevano F, Pasquier B, Betti OO (1995) Role of the hypothalamic hamartoma in the genesis of gelastic fits (a video-stereo-EEG-study). Electroencephalogr Clin Neurophysiol 95:154–160
Oehl B, Brandt A, Fauser S, Bast T, Trippel M, Schulze-Bonhage A (2010) Semiological aspects of epileptic seizures in 31 patients with hypothalamic hamartoma. Epilepsia 51:2116–2123
Scholly J, Valenti MP, Staack AM, Strobl K, Bast T, Kehrli P, Steinhoff BJ, Hirsch E (2013) Hypothalamic hamartoma: Is the epileptogenic zone always hypothalamic? Arguments for independent (third stage) secondary epileptogenesis. Epilepsia 54(suppl9):123–128
Steinmetz PN, Wait SD, Lekovic GP, Rekate HL, Kerrigan JF (2013) Firing behaviour and network activity of single neurons in human epileptic hypothalamic hamartoma. Front Neurol 27(4):210
Troester M, Haine-Schlagel R, Ng YT, Chapman K, Chung S, Drees C, Prenger E, Rekate H, Kerrigan JF (2011) EEG and video-EEG seizure monitoring has limited utility in patients with hypothalamic hamartoma and epilepsy. Epilepsia 52(6):1137–1143
Acknowledgments
We would like to thank Dr Maria-Paola Valenti, Dr Mustapha Benmekhbi, Prof Edouard Hirsch of the Medical and Surgical Epilepsy Units, University of Strasbourg, France, for scientific advice and assistance in technical aspects as well as Dr Thomas Bast, head of the paediatric section of the Kork Epilepsy Centre, and Dr Anne-Sophie Wendling, neuropsychologist for proofreading the manuscript.
This paper is dedicated to the neurosurgeon who performed the endoscopic resections, Prof Pierre Kehrli, head of the Department of Neurosurgery, University Hospital, Strasbourg, who passed away in May 2014.
Conflicts of interest
None.
Patient consent
The patients and their next of kin have consented to the submission of the case report for submission to the journal.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Staack, A.M., Strobl, K., Scholly, J. et al. First description of pharmacoresistant epilepsy due to independent bilateral hypothalamic hamartomas. Acta Neurochir 157, 57–61 (2015). https://doi.org/10.1007/s00701-014-2274-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00701-014-2274-7