{
  "url": "https://dantelabs.com/traits/amniotic-constriction-ring",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "amniotic-constriction-ring",
    "id": "HP:0009775",
    "name": "Amniotic constriction ring",
    "definition": "Annular constrictions around the digits, limbs, or trunk, occurring congenitally (sometimes causing intrauterine autoamputation) and also associated with a wide variety of disorders. Constrictive amniotic bands are the result of primary amniotic rupture, which can lead to entanglement of fetal tissue (especially limbs) in fibrous amniotic strands.",
    "synonyms": [
      "Amniotic bands",
      "Congenital constriction band sequence",
      "Pseudoainhum"
    ],
    "systems": [
      {
        "slug": "abnormality-of-prenatal-development-or-birth",
        "name": "Abnormality of prenatal development or birth",
        "url": "https://dantelabs.com/traits/abnormality-of-prenatal-development-or-birth"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-placental-membrane-morphology",
        "name": "Abnormal placental membrane morphology",
        "url": "https://dantelabs.com/traits/abnormal-placental-membrane-morphology"
      }
    ],
    "narrower": [
      {
        "slug": "digital-constriction-ring",
        "name": "Digital constriction ring",
        "genes": 2,
        "url": "https://dantelabs.com/traits/digital-constriction-ring"
      }
    ],
    "genes": [
      {
        "slug": "loricrin",
        "symbol": "LORICRIN",
        "hgnc": "HGNC:6663",
        "name": "loricrin cornified envelope precursor protein",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/loricrin"
      },
      {
        "slug": "gjb2",
        "symbol": "GJB2",
        "hgnc": "HGNC:4284",
        "name": "gap junction protein beta 2",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/gjb2"
      },
      {
        "slug": "gle1",
        "symbol": "GLE1",
        "hgnc": "HGNC:4315",
        "name": "GLE1 RNA export mediator",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gle1"
      },
      {
        "slug": "krt1",
        "symbol": "KRT1",
        "hgnc": "HGNC:6412",
        "name": "keratin 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/krt1"
      },
      {
        "slug": "trpv3",
        "symbol": "TRPV3",
        "hgnc": "HGNC:18084",
        "name": "transient receptor potential cation channel subfamily V member 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trpv3"
      },
      {
        "slug": "abca12",
        "symbol": "ABCA12",
        "hgnc": "HGNC:14637",
        "name": "ATP binding cassette subfamily A member 12",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/abca12"
      },
      {
        "slug": "alox12b",
        "symbol": "ALOX12B",
        "hgnc": "HGNC:430",
        "name": "arachidonate 12-lipoxygenase, 12R type",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/alox12b"
      },
      {
        "slug": "aloxe3",
        "symbol": "ALOXE3",
        "hgnc": "HGNC:13743",
        "name": "arachidonate epidermal lipoxygenase 3",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/aloxe3"
      },
      {
        "slug": "asprv1",
        "symbol": "ASPRV1",
        "hgnc": "HGNC:26321",
        "name": "aspartic peptidase retroviral like 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/asprv1"
      },
      {
        "slug": "cyp4f22",
        "symbol": "CYP4F22",
        "hgnc": "HGNC:26820",
        "name": "cytochrome P450 family 4 subfamily F member 22",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cyp4f22"
      },
      {
        "slug": "lipn",
        "symbol": "LIPN",
        "hgnc": "HGNC:23452",
        "name": "lipase family member N",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/lipn"
      },
      {
        "slug": "nipal4",
        "symbol": "NIPAL4",
        "hgnc": "HGNC:28018",
        "name": "NIPA like domain containing 4",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nipal4"
      },
      {
        "slug": "sdr9c7",
        "symbol": "SDR9C7",
        "hgnc": "HGNC:29958",
        "name": "short chain dehydrogenase/reductase family 9C member 7",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sdr9c7"
      },
      {
        "slug": "smarcad1",
        "symbol": "SMARCAD1",
        "hgnc": "HGNC:18398",
        "name": "SNF2 related chromatin remodeling ATPase with DExD box 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/smarcad1"
      },
      {
        "slug": "sult2b1",
        "symbol": "SULT2B1",
        "hgnc": "HGNC:11459",
        "name": "sulfotransferase family 2B member 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sult2b1"
      },
      {
        "slug": "tgm1",
        "symbol": "TGM1",
        "hgnc": "HGNC:11777",
        "name": "transglutaminase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tgm1"
      },
      {
        "slug": "tp63",
        "symbol": "TP63",
        "hgnc": "HGNC:15979",
        "name": "tumor protein p63",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tp63"
      },
      {
        "slug": "col3a1",
        "symbol": "COL3A1",
        "hgnc": "HGNC:2201",
        "name": "collagen type III alpha 1 chain",
        "frequency": "very-rare",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col3a1"
      },
      {
        "slug": "fermt1",
        "symbol": "FERMT1",
        "hgnc": "HGNC:15889",
        "name": "FERM domain containing kindlin 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fermt1"
      },
      {
        "slug": "kank2",
        "symbol": "KANK2",
        "hgnc": "HGNC:29300",
        "name": "KN motif and ankyrin repeat domains 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kank2"
      },
      {
        "slug": "pomp",
        "symbol": "POMP",
        "hgnc": "HGNC:20330",
        "name": "proteasome maturation protein",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/pomp"
      }
    ]
  }
}