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Diagnostic delay is common among patients with hypophosphatasia: initial findings from a longitudinal, prospective, global registry.


ABSTRACT: BACKGROUND:Hypophosphatasia (HPP) is a rare, systemic disease caused by mutation(s) within the ALPL gene encoding tissue-nonspecific alkaline phosphatase (ALP). HPP has a heterogeneous presentation, which coupled with its rarity, often leads to missed/delayed diagnosis and an incomplete understanding of its natural history. To better understand the epidemiology and clinical course of HPP, including timing of diagnosis after first reported manifestation, we present baseline data for patients enrolled in the Global HPP Registry. METHODS:Data were analyzed from patients with an HPP diagnosis confirmed by low serum ALP activity and/or an ALPL pathogenic variant, regardless of prior or current treatment, according to age at enrollment (children: ?12?months before diagnosis at age 20.4?months (-?0.2 mo, 16.0 y). In adults, the earliest reported manifestation occurred at a median (min, max) age of 37.6?years (0.2 y, 75.2 y), which preceded age at diagnosis (47.5?years [0.2 y, 75.2 y]) by ~?10?years. Premature loss of deciduous teeth (48.2%, age???6 mo), bone deformity (32.5%), and failure to thrive (26.7%) were most commonly reported in the HPP-related disease history of children. Pain (74.5%), orthopedic procedures and therapies (44.6%), and recurrent and poorly healing fractures (36.5%) were most commonly reported in the HPP-related disease history of adults. CONCLUSIONS:The Global HPP Registry represents the largest observational study of patients with HPP, capturing real world data. This analysis shows that diagnostic delay is common, reflecting limited awareness of HPP, and that HPP is associated with systemic manifestations across all ages. Many patients diagnosed in adulthood had HPP manifestations in childhood, highlighting the importance of taking thorough medical histories to ensure timely diagnosis. TRIAL REGISTRATION:Clinicaltrials.gov : NCT02306720 , December 2014; ENCePP.eu: EUPAS13526 , May 2016 (retrospectively registered).

SUBMITTER: Hogler W 

PROVIDER: S-EPMC6376686 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Diagnostic delay is common among patients with hypophosphatasia: initial findings from a longitudinal, prospective, global registry.

Högler Wolfgang W   Langman Craig C   Gomes da Silva Hugo H   Fang Shona S   Linglart Agnès A   Ozono Keiichi K   Petryk Anna A   Rockman-Greenberg Cheryl C   Seefried Lothar L   Kishnani Priya S PS  

BMC musculoskeletal disorders 20190214 1


<h4>Background</h4>Hypophosphatasia (HPP) is a rare, systemic disease caused by mutation(s) within the ALPL gene encoding tissue-nonspecific alkaline phosphatase (ALP). HPP has a heterogeneous presentation, which coupled with its rarity, often leads to missed/delayed diagnosis and an incomplete understanding of its natural history. To better understand the epidemiology and clinical course of HPP, including timing of diagnosis after first reported manifestation, we present baseline data for patie  ...[more]

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