Evidence map›Paper›PMID 34876442›Full record

ArticleBMJ case reports2021

Alkaptonuria: clinical manifestations and an updated approach to treatment of a rare disease.

Ryan Curtis Roopnarinesingh, Noel Edward Donlon, John V Reynolds

Open access · greenAbstract readCase Reports
In one paragraph

Article in BMJ case reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.4field-weighted citation impact, top 39% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 7 citations in OpenAlex.

  1. Tracheal ochronosis.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Ryan Curtis RoopnarinesinghDepartment of Surgery, Royal College of Surgeons in Ireland, Dublin, Ireland ryanroopnarinesingh@rcsi.com.ORCID http://orcid.org/0000-0001-8088-7016
Noel Edward DonlonDepartment of Upper GI Surgery, St.James Hospital, Dublin, Ireland.
John V ReynoldsDepartment of Upper GI Surgery, St.James Hospital, Dublin, Ireland.
St. James's Hospital · IERoyal College of Surgeons in Ireland · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Alkaptonuria (AKU) is a rare autosomal recessive disorder with a global incidence of 1 in 250 000 to 1 million people worldwide. It results from a deficiency of the enzyme homogentisic acid (HGA) oxidase which when absent, leads to an accumulation of HGA. Without this enzymatic degradation, HGA deposits in connective tissues resulting in pigmentation (ochronosis), plaque formation and accelerated cartilage destruction. With this, many patients who suffer from AKU develop ochronotic arthropathies, tendon ruptures, fractures, and chronic joint pain. Similarly, patients can develop cardiac valvular dysfunction and interstitial renal disease. Our two cases highlight the array of pathologies seen in AKU and, in light of newly published research, give us a platform from which we can discuss the developments in management of this rare disease.

Indexed as

AlkaptonuriaCartilage, ArticularOchronosisHomogentisic AcidHumansRare DiseasesHomogentisic Acidgenetic screening / counsellingoesophageal cancerorthopaedic and trauma surgerysurgical oncology

Identifiers

PMID34876442
PMCPMC8655580
OpenAlexW4200311202

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.