<scp>P</scp>11.03: Human tail: a four cases series
Bibliographic record
Abstract
The « human tail » is just one example of what evolutionist call a vestigial organ and represents a remnant of what was once a functional and useful organ in our primitive ancestors. During the 5th-6th week of pregnancy, the human embryo has a physiological tail. This structure eventually regresses by the 8th week by the fusion of vertebrae, leaving behind the vestigial coccyx. Persistence beyond the first trimester is unusual. A true tail arises from the most distal non-vertebrate remnant of the embryonic tail. This appendage located in the sacrococcygeal area contains adipose tissue, connective tissue, muscles, blood vessels and nerves, which are all covered by a layer of skin. It never contains bones. A true tail presents with associated congenital anomalies in 29% of cases. A true tail must be differentiated from a pseudo tail caused by a prominent sacrum, an elongated coccyx, an undelying lipoma or sacro-coccygian teratoma, or a pilonidal sinus. We report four cases of vestigial tail. Supporting information can be found in the online version of this abstract P11.03: Table 1. A four cases series Nucal translucency 4,7 mm Prominent coccyx cloverleaf skull hypertelorism diaphragmatic hernia thoraco abdominal discrepancy with short ribs Mild ventriculomegaly Left pelvic kidney - cloverleaf skull - cleft palate - missing nasal bone - vertebral segmentation anomalies - thoraco-lumbar kyphosis - short ribs - sacral tail Prominent coccyx - normal spinal cord - normal posterior fossa - pre-frontal soft tissue thickening Non-vascularized skin outgrowth of 9 mm attached to the sacrum Normal posterior fossa Microencephaly Diffuse bilateral frontal and parietal gyration anomalies Mild ventriculomegaly C-section at 38 weeks Neonatal death at 1h20 of life Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.004 | 0.002 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.006 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".