This patient had the lesion resected by a transcallosal approach:
MACROSCOPIC DESCRIPTION: 1. "Colloid cyst": A strip of soft white tissue 12x1x1mm. A1. 2. "Colloid cyst": A strip of soft white tissue 8x1x1mm. A1.
MICROSCOPIC DESCRIPTION: 1,2. The sections show a cyst, which is lined by a layer of cuboidal to columnar epithelium. Some goblet cells are noted. The wall is fibrous. No evidence of malignancy is seen. The features are those of a colloid cyst.