Primary spinal hydatid disease is rare and represents an uncommon but significant manifestation of hydatid disease. We report a case of primary intraspinal extradural hydatid cyst of the thoracic region causing spinal cord compression. The presenting symptoms were mostly atypical and the diagnosis was established preoperatively on the basis of magnetic resonance imaging. The patient underwent surgery resulting in complete recovery and is recurrence-free after 24 months follow-up.

'Mirror-like' or 'twin' aneurysms, which are located bilaterally on corresponding arteries, constitute less than 5% of overall aneurysms and mirror aneurysms on proximal anterior cerebral artery (A1) have never been reported in the past. We report a case of bilateral proximal A1 segment aneurysms (mirror). The approach to this patient is being described and the literature reviewed. The proximal A1 segment aneurysm is more approachable from the contralateral side. In case of mirror A1 aneurysms, the approach may be better from contralateral side of the larger aneurysm.