Postoperative Regression of Desmoplastic Infantile Gangliogliomas: Report of Two Cases

Department of Neurosurgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan.
Neurosurgery (Impact Factor: 3.62). 11/2003; 53(4):979-83; discussion 983-4. DOI: 10.1227/01.NEU.0000084165.60662.6D
Source: PubMed


Desmoplastic infantile gangliogliomas (DIGs) are extremely rare tumors that respond well to treatment. However, their biological behavior remains to be clarified. We describe two patients whose DIGs spontaneously regressed after surgery, without adjuvant therapy.
A 9-month-old girl presented with left hemiparesis, and a 6-month-old boy presented with increasing head circumference. For both patients, neuroimaging demonstrated a huge cystic tumor that included a solid portion and was widely attached to the dura. Gadolinium-diethylenetriamine penta-acetic acid produced strong enhancement.
One patient underwent partial and the other subtotal tumor removal. Histologically, both tumors were diagnosed as DIGs. Postoperatively, the residual tumors were monitored without adjuvant therapy, and both regressed in several months.
Our experience suggests that DIGs may include a subgroup of tumors with a tendency for spontaneous regression, possibly attributable to the induction of apoptosis.

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Available from: Hideo Takeshima, Mar 03, 2014
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    • "However, follow-up has generally been favorable following complete resection in the reported cases of DIG, with a median post-surgical interval of 8.7 years without metastases or recurrence in one series of 14 patients [2]. Additionally, in some cases, spontaneous regression of tumor following subtotal tumor resection has been documented [7,8]. "
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    ABSTRACT: Background Desmoplastic infantile ganglioglioma (DIG) is a rare WHO Grade I tumor of infancy that is characterized by large volume, superficial location, invariable supratentoriality, fronto-parietal lobe predilection and morphologically, by an admixture of astroglial and neuroepithelial elements in a desmoplastic milieu. With over 50 cases described, the histologic and radiographic spectrum of DIG has been well-characterized. The superficial location of DIGs may render them greatly amenable to preoperative assessment utilizing aspiration cytology; however, the cytologic features of this rare tumor have only been reported once previously. Case Presentation We present herein cytomorphologic findings from the intraoperative aspiration of a typical case of DIG diagnosed in a 1-year-old male. As evaluated on a single liquid-based preparation, the specimen showed low cellularity and was comprised predominantly of a population of dispersed (occasionally clustered) large neuronal cells with eccentrically located hyperchromatic nuclei (which were occasionally binucleated) and abundant unipolar cytoplasm. Rare smaller astroglial cells were intermixed. Despite the tumor's characteristic desmoplastic histologic appearance, no stromal fragments were identified on the aspiration material. Conclusions A differential diagnosis is presented and analyzed in detail and it is concluded that when these large neuronal cells are encountered in an aspirate of a brain mass in a child, a combination of clinical, radiologic and immunohistochemical parameters can eliminate most of the differential possibilities.
    CytoJournal 02/2005; 2(1):1. DOI:10.1186/1742-6413-2-1
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    ABSTRACT: Background Desmoplastic infantile gangliogliomas are rare intracranial tumors that mostly occur in the first 2 years of life. They are exclusively supratentorial, generally have a voluminous size, and are partially cystic. Histologically they are characterized by a divergent astrocytic and ganglionic differentiation and a prominent desmoplastic stroma; more primitive cells may be observed, which present a higher number of mitoses and these areas can mimic the features of malignant astrocytomas. Surgery is the treatment of choice. Data available from the literature suggest that no complimentary treatment is needed in cases of complete tumor resection. Chemotherapy is an option in infants with infiltration of eloquent CNS structures and progressive disease after surgery. DIGs have generally a good prognosis: recurrence-free intervals of up to 14 years have been reported and spontaneous disappearance of tumor residuals has also been described. Case reports and discussion We report two cases of DIGs. The first child underwent a staged partial removal of a huge right fronto-temporo-parietal tumor when she was 2 months old. At that time histological diagnosis was anaplastic astrocytoma and on these grounds she underwent six chemotherapy cycles, with a partial reduction of the tumor residual. When she was 16 months old a new operation and complete removal of the tumor residual was performed; histological diagnosis was DIG. A review of the initial histological samples confirmed this diagnosis. Twenty-two months after surgery no tumor recurrence has been documented. This case is an example of a difficult differential diagnosis, which can lead to incorrect management choices. The second patient was operated on when he was 9 months old for a mostly cystic right temporo-parieto-occipital DIG. At surgery a deep nodule, strictly adherent to the Galen and internal cerebral veins, was not removed. MRI control 9 months after surgery showed the disappearance of the tumor residual. Eleven years after surgery no tumor recurrence has been documented. The history of this patient confirms that tumor residuals do not need complimentary treatment; indeed they do not usually grow and, as in our patient, they can spontaneously disappear.
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    ABSTRACT: We report the atypical MRI features and histopathological findings of a desmoplastic infantile ganglioglioma in an 8-year-old girl. The mass was predominantly solid with a large, solid, non-enhancing exophytic component. The adjacent brain showed cortical necrosis and white-matter gliosis, suggesting earlier hypoxia.
    Pediatric Radiology 11/2005; 35(10):1024-6. DOI:10.1007/s00247-005-1497-4 · 1.57 Impact Factor
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