TABLE 1.

Details of Clinical and Histologic Findings for Each Case

Case Details		Endolymphatic Hydrops*				Patency of Endolymphatic System				Endolymphatic Sac Surgery
No.	Sex/Age	Cochlea	Saccule	Utricle	Ampullae	Ductus Reuniens	Saccular Duct	Utricular Duct	Endolymph Duct	Age at Surgery	Histology of Sac	Relief from Vertigo
1 (MEEI)	F/91	+	+++	+	−	blocked	blocked	blocked	patent	53	exposed, not entered	no
2 (MEEI)	M/71	+++	+	−	−	blocked	patent	patent	blocked	63	not exposed	yes
3 (MEEI)	M/91	+++	+++	+	+	blocked	patent	patent	patent	60	not exposed	yes
4 (MEEI)	M/81	+++	+++	−	+++	blocked	patent	patent	patent	74	not exposed	no
5 (HEI)	M/54	++	+++	+	+	patent	CNA	patent	patent	52	not exposed	yes
6 (HEI)	F/71	++	+	+	−	CNA	blocked	blocked	patent	67	not exposed	yes
7 (HEI)	F/69	++	+++	+	+	blocked	patent	Patent	blocked	55	exposed, not entered	yes
8 (HEI)	F/67	++	CNA	−	+	patent	patent	patent	patent	63	exposed, not entered	no
9 (HEI)	F/56	+	+	−	−	patent	CNA	patent	patent	42	exposed, not entered	no
10 (HEI)	M/51	+++	+++	+	+	patent	patent	patent	patent	46	exposed, entered	no
11 (HEI)	M/77	+++	+++	+	+	blocked	patent	patent	patent	66	exposed, not entered	no
12 (HEI)	F/82	++	++	+	−	patent	patent	patent	patent	57	exposed, not entered	yes
13 (HEI)	M/65	+++	+++	++	+	CNA	patent	blocked	patent	56	exposed, not entered	yes
14 (HEI)	M/69	+++	CNA	+	+	blocked	blocked	patent	patent	50	exposed, not entered	yes
15 (UCLA)	F/63	+++	++	++	+	CNA	patent	blocked	patent	46	exposed, entered	no

^*hydrops grading: − none; + mild; ++ moderate; +++ severe

CNA – could not assess

MEEI- Massachusetts Eye and Ear Infirmary; HEI- House Ear Institute; UCLA- University of California, Los Angeles