Pacinioma of Lumbosacral Skin in Closed Spinal Dysraphism
Bibliographic record
Abstract
Closed spinal dysraphism (CSD) is a congenital condition caused by a failure in secondary neurulation during embryogenesis. CSD is associated with characteristic cutaneous stigmata often identified clinically. Rarely, such stigmata have been reported to occur with complex congenital intraspinal lipomas containing Pacinian corpuscle hyperplasia. Herein, we present our case of an asymptomatic 8-month-old female who presented with a midline lumbosacral acrochordon-like lesion. MRI revealed a midline lipomatous lesion at S2-S3 with a fibrovascular stalk likely continuous with the acrochordon. Given the absence of neurological symptoms concerning tethered cord syndrome (TCS), only the skin lesion was removed for cosmesis. Subsequent histopathological examination revealed numerous Pacinian corpuscles in a background of dermal collagen and subcutaneous adipose tissue. No features suggested a co-existent peripheral nerve sheath lesion (such as a neurofibroma). Given the spinal cord abnormalities, and the histologic features of a pure proliferation of Pacinian corpuscles, a diagnosis of the so-called "Pacinioma" was made. To the best of our knowledge, only four other cases of complex intraspinal lipomatous lesions containing Pacinioma in the setting of CSD with a tethered cord have been previously reported. This case highlights the complexity of the cutaneous stigmata of CSD.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
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".