Acute lithium toxicity: two cases with different outcomes.

484 Postoperative recovery was uneventful. Histopathology of the lesion confirmed it as hydatid cyst. Postoperative therapy consisted of albendazole at 10 mg/kg dose for a period of six months to minimize the risk of recurrence. The patient is asymptomatic and is doing well since last two years. Cerebral hydatid cysts constitute only a small percentage of space occupying lesions of the brain more common in children and young adults.[1-3] They are mostly supratentorial and tend to occur in the distribution of the middle cerebral artery.[4] CT scan and magnetic resonance (MR) imaging are the most useful diagnostic techniques. Recently, proton MR spectroscopy using in vivo pyruvate has been described for better confirmation of cystic neoplasms.[5] Surgery is the treatment of choice even in cases of recurrence of the cyst. Aspiration of the hydatid cyst is usually avoided as it can lead to contamination of the other sites and risk of recurrence. Antihelminthic therapy is also given for the treatment of assosciated systemic disease if present.[3] The etiology for the development of the multiple cysts can be either because of the organism like Echinococcus multilocularis or can be because of the rupture of the primary cyst. However, in such cases, there should be common germinal membrane to all the cysts or there should be presence of disease at more than one site. We found all the cysts without any common membrane making this case unique and hence this presentation was attributed to development of multiple primary unilobar hydatid cysts.[3]