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2016 ; 11
(1
): 85
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English Wikipedia
Causes of death and clinical characteristics of 34 patients with
Mucopolysaccharidosis II in Taiwan from 1995-2012
#MMPMID27349225
Lin HY
; Chuang CK
; Huang YH
; Tu RY
; Lin FJ
; Lin SJ
; Chiu PC
; Niu DM
; Tsai FJ
; Hwu WL
; Chien YH
; Lin JL
; Chou YY
; Tsai WH
; Chang TM
; Lin SP
Orphanet J Rare Dis
2016[Jun]; 11
(1
): 85
PMID27349225
show ga
BACKGROUND: Mucopolysaccharidosis type II (MPS II) is an X-linked recessive,
multisystemic lysosomal storage disorder caused by a deficiency of
iduronate-2-sulfatase. MPS II has a variable age of onset and variable rate of
progression. In Asian countries, there is a relatively higher incidence of MPS II
compared to other types of MPS. METHODS: A retrospective analysis was carried out
of 34 Taiwanese MPS II patients who died between 1995 and 2012. The clinical
characteristics, medical records, age at death, and cause of death were evaluated
to better understand the natural progression of this disease. RESULTS: The mean
age at death of 31 of the patients with a severe form of the disease with
significant cognitive impairment was 13.2?±?3.2 years, compared with
22.6?±?4.3 years in the three patients with a mild form of the disease without
cognitive involvement (n?=?2) or the intermediate form (n?=?1) (p?0.001). The
mean ages at onset of symptoms and confirmed diagnosis were 2.5?±?2.1 and
4.8?±?3.1 years, respectively (n?=?32). Respiratory failure was the leading cause
of death (56 %), followed by cardiac failure (18 %), post-traumatic organ failure
(3 %), and infection (sepsis) (3 %) (n?=?27). Age at onset of symptoms was
positively correlated with life expectancy (p?0.01). Longevity gradually
increased over time from 1995 to 2012 (p?0.05). CONCLUSIONS: Respiratory
failure and cardiac failure were the two major causes of death in these patients.
The life expectancy of Taiwanese MPS II patients has improved in recent decade.