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Hyperhydroxyprolinemia

MedGen UID:
75691
Concept ID:
C0268531
Disease or Syndrome
Synonyms: 4 alpha hydroxy-L-proline oxidase deficiency; Hydroxyprolinemia
SNOMED CT: Hyperhydroxyprolinemia (25739007); Hydroxyprolinemia (25739007)
 
HPO: HP:0003260
Monarch Initiative: MONDO:0009374
OMIM®: 237000

Definition

Hydroxyproline is an imino acid normally present in human plasma. It is derived primarily from endogenous collagen turnover and the breakdown of dietary collagen. The finding of elevated (5- to 10-fold increase from the normal of less than 50 micromoles) serum hydroxyproline is thought to be an inherited defect in the catabolism of hydroxyproline. [from OMIM]

Clinical features

From HPO
Microscopic hematuria
MedGen UID:
65997
Concept ID:
C0239937
Finding
Microscopic hematuria detected by dipstick or microscopic examination of the urine.
Intellectual disability
MedGen UID:
811461
Concept ID:
C3714756
Mental or Behavioral Dysfunction
Intellectual disability, previously referred to as mental retardation, is characterized by subnormal intellectual functioning that occurs during the developmental period. It is defined by an IQ score below 70.
Hyperhydroxyprolinemia
MedGen UID:
75691
Concept ID:
C0268531
Disease or Syndrome
Hydroxyproline is an imino acid normally present in human plasma. It is derived primarily from endogenous collagen turnover and the breakdown of dietary collagen. The finding of elevated (5- to 10-fold increase from the normal of less than 50 micromoles) serum hydroxyproline is thought to be an inherited defect in the catabolism of hydroxyproline.

Conditions with this feature

Hyperphosphatasemia with bone disease
MedGen UID:
75678
Concept ID:
C0268414
Disease or Syndrome
Paget disease of bone-5 is an autosomal recessive, juvenile-onset form of Paget disease, a disorder of the skeleton resulting from abnormal bone resorption and formation. Clinical manifestations include short stature, progressive long bone deformities, fractures, vertebral collapse, skull enlargement, and hyperostosis with progressive deafness. There is phenotypic variability, with some patients presenting in infancy, while others present later in childhood (summary by Naot et al., 2014). For discussion of genetic heterogeneity of Paget disease of bone, see 167250.
Hyperhydroxyprolinemia
MedGen UID:
75691
Concept ID:
C0268531
Disease or Syndrome
Hydroxyproline is an imino acid normally present in human plasma. It is derived primarily from endogenous collagen turnover and the breakdown of dietary collagen. The finding of elevated (5- to 10-fold increase from the normal of less than 50 micromoles) serum hydroxyproline is thought to be an inherited defect in the catabolism of hydroxyproline.

Recent clinical studies

Etiology

Fingerhut R
Eur J Pediatr 2009 May;168(5):599-604. Epub 2008 Aug 6 doi: 10.1007/s00431-008-0804-0. PMID: 18682982

Diagnosis

Fingerhut R
Eur J Pediatr 2009 May;168(5):599-604. Epub 2008 Aug 6 doi: 10.1007/s00431-008-0804-0. PMID: 18682982

Prognosis

Fingerhut R
Eur J Pediatr 2009 May;168(5):599-604. Epub 2008 Aug 6 doi: 10.1007/s00431-008-0804-0. PMID: 18682982

Clinical prediction guides

Fingerhut R
Eur J Pediatr 2009 May;168(5):599-604. Epub 2008 Aug 6 doi: 10.1007/s00431-008-0804-0. PMID: 18682982

Supplemental Content

Table of contents

    Clinical resources

    Practice guidelines

    • PubMed
      See practice and clinical guidelines in PubMed. The search results may include broader topics and may not capture all published guidelines. See the FAQ for details.

    Curated

    • ACMG ACT, 2021
      American College of Medical Genetics and Genomics, Newborn Screening ACT Sheet, Increased Leucine, Maple Syrup Urine Disease, 2021
    • ACMG Algorithm, 2021
      American College of Medical Genetics and Genomics, Algorithm, Leucine Elevated, 2021

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