Table 3.

Table 3 The Information about the Anonymous Nodes Retrieved from the Concept Lattice of the Domain “Hypophysectomy”

Anonymous Node	Own Object	Own Attribute	Extension
Node 1	None	None	1. Total excision of pituitary gland by transsphenoidal approach
			2. Total excision of pituitary gland by transfrontal approach
Node 2	None	Transfrontal approach(Approach)	1. Total excision of pituitary gland by transfrontal approach
			2. Partial excision of pituitary gland by transfrontal approach
			3. Excisional biopsy of pituitary gland by transfrontal approach
Node 3	None	None	1. Partial excision of pituitary gland by transsphenoidal approach
			2. Partial excision of pituitary gland by transfrontal approach
Node 4	None	None	1. Excisional biopsy of pituitary gland by transsphenoidal approach
			2. Excisional biopsy of pituitary gland by transfrontal approach
Node 5	None	Excision biopsy(Method)	1. Excisional biopsy of pituitary gland by transsphenoidal approach
			2. Excisional biopsy of pituitary gland by transfrontal approach
			3. Excisional biopsy of hypophysis

“None” indicates that no label was found for own object(s) or own attribute(s) of an anonymous node.