A case report of an unusual cerebral hydatid cyst.

Background: Intracranial hydatid cyst is an exceedingly uncommon condition. Typically, it manifests as hydatid cysts in the liver, lungs, kidney, and spleen. In this report, we present a rare case of a hydatid cyst located in the brain, exhibiting atypical radiological characteristics, and successfully treated with complete microsurgical excision. Case Description: A 45-year-old male, a former smoker, presented with a new-onset seizure. Brain imaging revealed a solitary, intra-axial, and cystic lesion with wall enhancement in the right temporal region. The cyst extended into the temporal horn of the right lateral ventricle, surrounded by mild edema. Differential diagnoses included brain metastasis, abscess, and tuberculoma. However, following computed tomography (CT) scans of the chest, abdomen, and pelvis (CAP) and serological tests, the provisional diagnosis included a hydatid cyst. The CT CAP showed diffuse non-specific cystic lesions of variable sizes in the liver and spleen, along with numerous bilateral pulmonary cysts. A right temporal craniotomy was performed, and the cyst was microsurgically excised without rupture. Microscopic and histopathological examination confirmed the presence of a hydatid cyst. Conclusion: Intracranial hydatid cyst is an extremely rare condition and should always be considered a possible differential diagnosis in cases of cerebral cystic lesions. Hydrodissection is the preferred surgical method for resection; however, in atypical cases such as the one described here, meticulous dissection of the cyst capsule from the brain parenchyma may be successful with minimal risk of intraoperative rupture.

Atypical haemorrhagic colloid cyst: 2 case reports surgical management and review of literature.

INTRODUCTION: Colloid cysts are benign cystic lesions located at the anterior part of the third ventricle mostly at the foramen of Monro and contain colloid material. Hemorrhage in a colloid cyst is exceedingly rare. Only 15 clinically diagnosed cases of haemorrhagic cysts were reported in the literature and 5 more cases on autopsy. Here we report two rare cases of a haemorrhagic colloid cyst describing the atypical radiological findings, the undertaken surgical procedures and histopathological results. PRESENTATION OF CASES: We presented 2 cases of haemorrhagic third ventricle colloid cysts. First case is a 27-year-old male patient, presented with dizziness, nausea, vomiting and blurring of vision. He was operated by transcortical endoscopic transventricular excision of a third ventricular cyst and the insertion of external ventricular drain. The second patient is a 21-year-old male, presented with history of worsening headache for 1 month associated with blurring of vision. The patient had a transcortical microscopic, transventricular cyst excision. DISCUSSION: Many questions regarding the best way to diagnose and manage such lesions remain unanswered. Hence, we summarize the relevant diagnostic images and best surgical techniques. CONCLUSION: We concluded that, though exceedingly rare, colloid cyst can bleed and cause rapid deterioration in neurological status, thus, presence of atypical features should alert the physicians to consider atypical colloid cyst that would be valuable in surgical decision making whether endoscopic or microscopic.