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      "link": "https://creativecommons.org/licenses/by/4.0",
      "name": "Creative Commons Attribution 4.0 International"
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    "results": {
      "Date": "2026-06-23 07:53:50",
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          "DisorderDisorderAssociationType": "Moved to",
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            "ORPHAcode": 1773,
            "Preferred term": "Sacrococcygeal dysgenesis association"
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          "DisorderMappingICDRelation": null,
          "DisorderMappingRelation": "E (Exact mapping: the two concepts are equivalent)",
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          "Source": "GARD"
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          "Source": "MONDO"
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          "Source": "MedDRA"
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          "Reference": "C0300948",
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      "OrphanetURL": "http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=en&Expert=3027",
      "Preferred term": "Caudal regression syndrome",
      "SummaryInformation": [
        {
          "Definition": "A rare congenital malformation of the lower spinal segments characterized by a high truncated conus with either aplasia or hypoplasia of the sacrum and lumbar spine. Coexisting malformations of gastrointestinal, genitourinary, skeletal, nervous system are commonly described."
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        "Caudal dysgenesis syndrome",
        "Caudal dysplasia",
        "Caudal regression sequence"
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      "Typology": "Malformation syndrome"
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    "name": "Rare diseases and cross-referencing"
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