Vestibular function in superficial siderosis

Table 1 Summary of five patients

Pt	Age Sex	Chief complaint	Duration of disease	Cause of bleeding	Audiologic data			Vestibular data							MRI Deposit of hemosiderin		Cause of impaired balance
					PTA (dB)	Speech	DPOAE	Dynamic Posturo- graphy	Romberg sign	Nystagmus	ETT	OKN	Caloric	VEMP	CNS	8th
1	53 F	Bil HL Dizziness Tinnitus Headache	Several months	Unknown	Rt41.7 Lt33.3	-	-	AN	+	mixed horizontal androtatory nystagmus to the right	N	AN	Rt: Hypo-reflexia Lt: N	N	+	+	CNS
2	71 F	Bil HL, Dizziness	2-3 years	Unknown	Rt55.0 Lt63.3	-	-	AN	+	horizontal nystagmus to the right	N	AN	Areflexia	Absent	+	-	CNS +SV +IV
3	55M	Bil HL	Several weeks	Post brain surgery	Rt53.3 Lt63.3	Rt 70% (70dB) Lt10% (100dB)	none	N	+	pendular nystagmus	AN	AN	Rt: Hypo- reflexia Lt: N	N	+	-	CNS +SV
4	73M	Lt HL Vertigo Tinnitus	2-3 years	Post brain surgery	Rt55.0 Lt75.0	Rt 65% (90dB) Lt 70% (100dB)	Absent	N	+	horizontal nystagmus to the left	AN	AN	Areflexia	Absent	-	-	CNS +SV +IV
5	79M	Bil HL	17 years	HT	Deaf	-	none	AN	-	Vertical nystagmus upward	AN	AN	Areflexia	Lt Absent	+	-	CNS +SV +IV

Saccule-inferior vestibular function is maintained at early stages of the superficial siderosis patients.
Abbreviation: HL: Hearing loss, HT: Hypertension, PTA: Pure Tone Audiometry, DPOAE: Distortion product otoacoustic emissions, N: normal, AN: abnormal,
ETT: Eye tracking test, OPN: Optokinetic nystagmus, VEMP: Vestibular evoked myogenic potential, CNS: Central nervous system,
SV: Superior vestibular function, IV: Inferior vestibular function.

ISSN: 1472-6815