Table 2. OTS group: Summary of histological alterations.

Types of alterations	Categories	−	+
Otosclerosis active lesions	Nonosseous hypercellular tissue	0
	Bone resorption/bone deposition activity
	Osteoblasts/osteoclasts		1
	Prominent cementitious lines; woven bone		9/5
	Mucous vasculofibrous increment		1
	Acidophilia of bone tissue	0
Other classic criteria associated with otosclerosis	Perivascular blue	0
	Central sponginosis and peripheral sclerosis (preotosclerosis)	0
General	Irregularities of the contours of the crura		1
	Reduction of the cartilaginous superior cap		9
	Fibrous ligament		7

Abbreviations: −, absent; +, present; OTS, group with otosclerosis.