Intraventricular Masson tumor: case report and systematic review of primary intracranial intravascular papillary endothelial hyperplasia
Bibliographic record
Abstract
Intracranial Masson tumor (intravascular papillary endothelial hyperplasia, IPEH) is a benign lesion that is thought to originate from a reactionary process in response to compromised blood flow. IPEH may be classified into one of three subtypes based on etiology as it may result from the excessive proliferation of endothelial cells within a normal vessel (primary), vascular malformation (type II), or organized hematoma (type III). We report the case of a 79-year-old woman who presented with confusion, gait instability, and urinary incontinence. Neuroimaging revealed a hemorrhagic lesion within the right lateral ventricle, which was successfully resected. To our knowledge, this is the first reported case of an intraventricular IPEH and 33rd case of primary intracranial IPEH. We further performed a systematic review of the literature on all prior type I intracranial IPEH cases and discuss the importance of long-term follow-up in intracranial IPEH.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.006 | 0.002 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".