Acute Hydrocephalus Revealing Unusual Cerebellar Mass: Dysplastic Cerebellar
Gangliocytoma or Lhermitte-Duclos Disease (LDD)
164
Most patients have an uneventful postoperative period;
some cases with post-operative posterior fossa brain
swelling have been reported due to insufficiency tumor
removal by lack of clear margins between normal tissue
and the lesion; Yang Ms et al. [16] have reported a similar
case with post-operative brain swelling aggravating the
hydrocephalus resulting in an additional shunting; Afshar-
Oromieh et al. reported a case of post-operative cerebel-
lar mutism following a removal of LDD lesion, with dif-
ficulty to distinguish between tumor and healthy cere-
bellar tissue, resulting in extensive resection and neuron-
logical deficits [17].
In accordance with previous observations, our case of
Lhermitte-Duclos disease was macroscopically characte-
rized by an indistinct border between the normal and
tumour tissue. Nevertheless, surgical resection of the
cerebellar mass is undoubtedly the correct course of
treatment and clinical problems after gross macroscopic
or total removal of the disease have rarely been reported in
the literature. Surgical technics to distinguish the precise
margins of the abnormal tissue of the tumour from the
normal cerebellar tissue have to be discussed for the re-
moval of these kinds of lesions.
4. Conclusion
In conclusion, LDD is a rare cause of posterior fossa
masses characterized by symptoms of raised intracranial
pressure and atypical, “tiger striped” pattern on conven-
tional MRI. Complete surgical resection of the cerebellar
mass remains undoubtedly the correct course of treat-
ment but most of the time unachieved due to lack of dis-
tinct borders between the lesion and the normal cerebel-
lar tissue. Clinical complications after gross macroscopic
or total removal of the disease have rarely been largely
discussed in the literature and are still a major challenge
for the surgeon. Extreme caution should be taken in re-
moving these lesions in cerebellar areas that have no dis-
tinct borders between the lesion and normal tissue. In-
complete removal of the mass may result in cerebellar
swelling and clinical deterioration. Coexistence with
Cowden syndrome should prompt thorough clinical ex-
amination and necessary investigations to detect or ex-
clude concomitant malignancies.
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