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Polidactilia pós-axial tipo B
ORPHA:93335CID-10 · Q69.0CID-11 · LB78.2DOENÇA RARA

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Introdução

O que você precisa saber de cara

📋

Polidactilia pós-axial tipo B é uma anomalia congênita caracterizada pela presença de um ou mais dedos extras na borda ulnar da mão ou pé. Geralmente, esses dedos são rudimentares e podem estar unidos ao dedo adjacente.

Publicações científicas
20 artigos
Último publicado: 2026 Jan

Escala de raridade

CLASSIFICAÇÃO ORPHANET · BRASIL 2024
1-5 / 10 000
Ultra-rara
<1/50k
Muito rara
1/20k
Rara
1/10k
Pouco freq.
1/5k
Incomum
1/2k
Prevalência
43.5
Mexico
Início
Antenatal
🏥
SUS: Cobertura mínimaScore: 15%
CID-10: Q69.0
🇧🇷Dados SUS / DATASUS
PROCEDIMENTOS SIGTAP (5)
0202010503
Cariótipo — bandas G, Q ou Rgenetic_test
0202010600
Pesquisa de microdeleções/microduplicações por FISHlab_test
0202010694
Sequenciamento completo do exoma (WES)rehabilitation
0202010260
Dosagem de alfa-fetoproteína
0301070040
Atendimento em reabilitação — doenças raras
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Entender a doença

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Sinais e sintomas

O que aparece no corpo e com que frequência cada sintoma acontece

Linha do tempo da pesquisa

Publicações por ano — veja quando o interesse científico cresceu
Anos de pesquisa1desde 2025
Total histórico20PubMed
Últimos 10 anos12publicações
Pico20224 papers
Linha do tempo
2025Hoje · 2026📈 2022Ano de pico
Publicações por ano (últimos 10 anos)

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Genética e causas

O que está alterado no DNA e como passa nas famílias

Genes associados

2 genes identificados com associação a esta condição. Padrão de herança: Autosomal dominant.

GLI1Zinc finger protein GLI1Disease-causing germline mutation(s) inTolerante
FUNÇÃO

Acts as a transcriptional activator (PubMed:10806483, PubMed:19706761, PubMed:19878745, PubMed:24076122, PubMed:24217340, PubMed:24311597). Binds to the DNA consensus sequence 5'-GACCACCCA-3' (PubMed:2105456, PubMed:24217340, PubMed:8378770). Regulates the transcription of specific genes during normal development (PubMed:19706761). Plays a role in craniofacial development and digital development, as well as development of the central nervous system and gastrointestinal tract. Mediates SHH signal

LOCALIZAÇÃO

CytoplasmNucleus

VIAS BIOLÓGICAS (2)
Hedgehog 'off' stateHedgehog 'on' state
MECANISMO DE DOENÇA

Polydactyly, postaxial, A8

A form of postaxial polydactyly, a condition characterized by the occurrence of supernumerary digits in the upper and/or lower extremities. In postaxial polydactyly type A, the extra digit is well-formed and articulates with the fifth or a sixth metacarpal/metatarsal. PAPA8 is an autosomal recessive condition characterized by the presence of postaxial extra digits (hexadactyly) on the hands and/or the feet.

EXPRESSÃO TECIDUAL(Ubíquo)
Nervo tibial
46.2 TPM
Testículo
10.5 TPM
Próstata
7.3 TPM
Bladder
5.9 TPM
Cerebelo
5.0 TPM
OUTRAS DOENÇAS (5)
polydactyly of a biphalangeal thumbpolydactyly, postaxial, type A8Ellis-van Creveld syndromepostaxial polydactyly type A
HGNC:4317UniProt:P08151
GLI3Transcriptional activator GLI3Disease-causing germline mutation(s) inAltamente restrito
FUNÇÃO

Has a dual function as a transcriptional activator and a repressor of the sonic hedgehog (Shh) pathway, and plays a role in limb development. The full-length GLI3 form (GLI3FL) after phosphorylation and nuclear translocation, acts as an activator (GLI3A) while GLI3R, its C-terminally truncated form, acts as a repressor. A proper balance between the GLI3 activator and the repressor GLI3R, rather than the repressor gradient itself or the activator/repressor ratio gradient, specifies limb digit num

LOCALIZAÇÃO

NucleusCytoplasmCell projection, cilium

VIAS BIOLÓGICAS (2)
GLI3 is processed to GLI3R by the proteasomeHedgehog 'off' state
MECANISMO DE DOENÇA

Greig cephalo-poly-syndactyly syndrome

Autosomal dominant disorder affecting limb and craniofacial development. It is characterized by pre- and postaxial polydactyly, syndactyly of fingers and toes, macrocephaly and hypertelorism.

EXPRESSÃO TECIDUAL(Ubíquo)
Útero
27.0 TPM
Cólon sigmoide
21.9 TPM
Fallopian Tube
19.5 TPM
Ovário
19.4 TPM
Cervix Ectocervix
15.9 TPM
OUTRAS DOENÇAS (8)
Pallister-Hall syndromepolysyndactyly 4polydactyly, postaxial, type A1Greig cephalopolysyndactyly syndrome
HGNC:4319UniProt:P10071

Variantes genéticas (ClinVar)

404 variantes patogênicas registradas no ClinVar.

🧬 GLI1: NM_005269.3(GLI1):c.1308G>T (p.Met436Ile) ()
🧬 GLI1: NM_005269.3(GLI1):c.1576G>A (p.Gly526Ser) ()
🧬 GLI1: NM_005269.3(GLI1):c.1013G>T (p.Cys338Phe) ()
🧬 GLI1: NM_005269.3(GLI1):c.2968C>T (p.Arg990Ter) ()
🧬 GLI1: NM_005269.3(GLI1):c.1361del (p.Pro454fs) ()
Ver todas no ClinVar

Classificação de variantes (ClinVar)

Distribuição de 682 variantes classificadas pelo ClinVar.

34
239
409
Patogênica (5.0%)
VUS (35.0%)
Benigna (60.0%)
VARIANTES MAIS SIGNIFICATIVAS
GLI2: NM_001374353.1(GLI2):c.1452del (p.Lys484fs) [Likely pathogenic]
GLI2: NM_001374353.1(GLI2):c.695C>T (p.Ala232Val) [Uncertain significance]
GLI2: NM_001374353.1(GLI2):c.1294G>A (p.Asp432Asn) [Uncertain significance]
GLI2: NM_001374353.1(GLI2):c.1382C>T (p.Thr461Met) [Uncertain significance]
GLI2: NM_001374353.1(GLI2):c.2713G>A (p.Ala905Thr) [Uncertain significance]

Diagnóstico

Os sinais que médicos procuram e os exames que confirmam

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Tratamento e manejo

Remédios, cuidados de apoio e o que precisa acompanhar

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Onde tratar no SUS

Hospitais de referência no Brasil e o protocolo oficial do SUS (PCDT)

🇧🇷 Atendimento SUS — Polidactilia pós-axial tipo B

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Dados de DATASUS/CNES, SBGM, ABNeuro e Ministério da Saúde. Sempre confirme a disponibilidade diretamente com o estabelecimento.

Pesquisa ativa

Ensaios clínicos abertos e novidades científicas recentes

Pesquisa e ensaios clínicos

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Publicações mais relevantes

Timeline de publicações
12 papers (10 anos)
#1

Cost Effectiveness of Hand Postaxial Polydactyly Type B Excision in the Office Versus Operating Room.

Journal of hand surgery global online2026 Jan

Postaxial polydactyly type B of the hand can be excised in the office with local anesthesia or in the operating room under general anesthesia. Existing studies have not described the cost difference between these treatments. We compared charges, reimbursements, and outcomes of office and operating room excision. All cases of postaxial polydactyly type B excision at a children's hospital from fiscal year 2018-2023 were included. Independent t tests and Fisher exact tests were performed to compare the charges and outcomes of office and operating room excisions. Random-effects models were used to compare differences in reimbursements since these data were obtained as summary statistics (mean [SD]) by fiscal year. Of 620 total patients, 30 (4.8%) underwent operating room excisions (22 bilateral and 8 unilateral), and 590 (95%) had office excisions (346 bilateral and 244 unilateral). Average total charges were 78% and 84% less for bilateral and unilateral excisions, respectively, in the office than in the operating room. Insurance companies paid $7800 more for bilateral operating room excisions and $7600 more for unilateral operating room excisions. Surgeons received $2300 more for bilateral operating room excisions and $1300 more for unilateral operating room excisions. The treatment strategy did not impact outcomes. Given the cost efficacy and safety of office excision, operating room excision should be limited to patient-specific factors requiring general anesthesia. Prognosis IIb.

#2

Elective Terminations Because of Fetal Abnormalities: Findings in A Tertiary Maternity Center Over 41 Years (1972-2012).

American journal of medical genetics. Part A2025 Sep

Finding abnormalities in a fetus by prenatal testing during pregnancy is a common reason why parents choose to terminate a pregnancy. A malformations surveillance program of all births at a tertiary center in Boston was used to identify each elective termination because of a malformation detected prenatally. A severity scale of malformations was used: lethal (anencephaly), severe-handicapping (Down syndrome; myelomeningocele), moderate-fixable (omphalocele) and mild (postaxial polydactyly, type B). Demographic characteristics and the findings in prenatal testing were recorded. Six hundred and sixty-nine elective terminations because of fetal abnormalities were identified. A destructive procedure (dilation and evacuation; D&E) was the primary method used to end the pregnancy. The gestational age at the time of termination was 18 to 19 weeks. The two most common sequences of events were: (1) imaging by ultrasound established the diagnosis; (2) imaging by ultrasound led to amniocentesis which established the diagnosis. Ninety-four percent of the abnormalities were either lethal or severe-handicapping. The discovery of a fetal abnormality was a surprise to 98% of the parents. Single women differed from married women in being younger, less well-educated, less likely to have health insurance, and more likely to terminate a pregnancy with moderate-fixable malformations.

#3

Postaxial polydactyly: A case report highlighting genetic context, epidemiological trends, and management options.

SAGE open medical case reports2024

This case report examines a newborn with bilateral postaxial polydactyly type B, delivered by a 42-year-old mother with a history of third-degree consanguinity. The mother, having had no prior live births and one abortion, presented at 39 weeks gestation. The absence of prenatal care is noted, with its potential impact on prenatal diagnosis not assessed. The newborn, a healthy girl, weighed 3400 g with an Apgar score of 9/10. Radiographic and physical examination revealed vestigial sixth digits with rudimentary phalanges, influencing the surgical approach. This report underscores the importance of genetic counseling in cases of consanguinity and illustrates the multidisciplinary strategy necessary for managing polydactyly, from surgical considerations to genetic evaluation.

#4

Surgical Excision of Postaxial Polydactyly Type B in the Office Setting.

Journal of pediatric orthopedics2023 Apr 01

Simple postaxial polydactyly (type B) is a common congenital hand malformation often treated by suture or clip ligation. We present a case series of patients with simple postaxial polydactyly treated by surgical excision using local anesthesia in an office setting. The procedure was performed on 78 digits in 48 children with a mean age of 10.2 weeks. There were no intraoperative or early postoperative complications. A follow-up by phone interview was performed at an average of 3.2 years postoperatively. All patients were reported to be pain-free and have normal function without a perceived range of motion deficits. All parents selected the highest level of satisfaction regarding cosmetic outcomes and overall experience with the procedure. These results demonstrate that an office-based surgical excision is a safe, effective, and economical treatment option and has developed into our standard of care for this common condition.

#5

Novel Variant in Exon 3 of the BMP4 Gene Resulted in Ectopic Posterior Pituitary, Craniocervical Junction Dysmorphism and Limb Anomaly.

Case reports in pediatrics2022

Introduction. Pituitary differentiation involves a large number of transcription factors. In particular, BMP4 expression is fundamental for pituitary gland commitment from the ventral diencephalon, suppressing Shh expression in Rathke's pouch. Pathogenic variants in BMP4 are reported in the literature with a broad phenotypic spectrum, including pituitary and brain malformations. Case Presentation. A five-year-old girl came to medical attention following a mild cervical trauma with onset of cervical pain. On clinical examination at birth, postaxial polydactyly type B of the left hand was observed and removed at 10 months of age. A cervical radiography was performed, and a suspicion of craniocervical junction malformation was made. A magnetic resonance imaging of the cervical spine was made, showing an ectopic posterior pituitary, associated with dysmorphism of the craniocervical junction. The anthropometric parameters were pubertal Tanner stage 1, weight 16 kg (z-score: -1.09), height 107 cm (z-score: -0.76), and BMI 14 kg/m2 (z-score: -0.92). Normal hormonal assessment was detected. Genetic analysis via next generation sequencing showed a novel de novo heterozygous variant (c.277 G > T, p.Glu93 ∗ ) in exon 3 of BMP4. Discussion. We described a novel mutation in BMP4, resulting in ectopic posterior pituitary with normal hormonal assessment, associated to craniocervical junction dysmorphism and limb anomaly. It is important to monitor patient's growth and puberty and to screen the onset of symptoms related to the deficiency of one or more anterior as well as posterior pituitary hormones.

Publicações recentes

Ver todas no PubMed

📚 EuropePMC194 artigos no totalmostrando 12

Ver todos os 194 no EuropePMC

Associações

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Comunidades

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Doenças relacionadas

Doenças com sintomas parecidos — ajudam quem ainda está buscando diagnóstico

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Referências e fontes

Bases de dados externas citadas neste artigo

Publicações científicas

Artigos indexados no PubMed ligados a esta doença no grafo RarasNet — título, periódico e PMID direto da fonte, sem intermediação de IA.

  1. Cost Effectiveness of Hand Postaxial Polydactyly Type B Excision in the Office Versus Operating Room.
    Journal of hand surgery global online· 2026· PMID 41246367mais citado
  2. Elective Terminations Because of Fetal Abnormalities: Findings in A Tertiary Maternity Center Over 41&#x2009;Years (1972-2012).
    American journal of medical genetics. Part A· 2025· PMID 40259542mais citado
  3. Postaxial polydactyly: A case report highlighting genetic context, epidemiological trends, and management options.
    SAGE open medical case reports· 2024· PMID 39314219mais citado
  4. Surgical Excision of Postaxial Polydactyly Type B in the Office Setting.
    Journal of pediatric orthopedics· 2023· PMID 36622639mais citado
  5. Novel Variant in Exon 3 of the BMP4 Gene Resulted in Ectopic Posterior Pituitary, Craniocervical Junction Dysmorphism and Limb Anomaly.
    Case reports in pediatrics· 2022· PMID 35633847mais citado
  6. Current Treatment and Billing Trends of Postaxial Polydactyly Type B.
    Plast Reconstr Surg Glob Open· 2022· PMID 36032376recente

Bases de dados e fontes oficiais

Identificadores e referências canônicas usadas para montar este verbete.

  1. ORPHA:93335(Orphanet)
  2. MONDO:0019674(MONDO)
  3. GARD:16818(GARD (NIH))
  4. Variantes catalogadas(ClinVar)
  5. Busca completa no PubMed(PubMed)
  6. Q56014346(Wikidata)

Dados compilados pelo RarasNet a partir de fontes abertas (Orphanet, OMIM, MONDO, PubMed/EuropePMC, ClinicalTrials.gov, DATASUS, PCDT/MS). Este conteúdo é informativo e não substitui avaliação médica.

Conteúdo mantido por Agente Raras · Médicos e pesquisadores podem colaborar

Polidactilia pós-axial tipo B
Compêndio · Raras BR

Polidactilia pós-axial tipo B

ORPHA:93335 · MONDO:0019674
Prevalência
1-5 / 10 000
Herança
Autosomal dominant
CID-10
Q69.0 · Dedo(s) da mão supranumerário(s)
CID-11
Início
Antenatal
Prevalência
43.5 (Mexico)
MedGen
UMLS
C1868120
EuropePMC
Wikidata
Papers 10a
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