Scalp angiosarcoma in elderly patient: case report
Bibliographic record
Abstract
Cutaneous angiosarcomas are rare, aggressive tumors, and represent < 1% of all malignant head and neck neoplasms.Their highest incidence is in elderly men and Caucasians.The importance of reporting cases of this type of tumor is to emphasize it as a differential diagnosis in the elderly.We report a 90-year-old Caucasian male patient with an erythematous and infiltrative scalp tumor.Surgical resection and anatomopathological evaluation, including immunohistochemical studies, diagnosed a high-grade angiosarcoma.Primary cutaneous angiosarcoma is the main form of angiosarcoma, with rapid evolution, affecting mainly the scalp and face.It presents with varied morphologies, irregular growth, and spontaneous bleeding.Microscopic findings include infiltrating and anastomosing vascular channels lined by atypical endothelial cells, as well as solid growth in high-grade tumors.The prognosis is poor, usually related to the patient's age, lesion site, and disease stage.The variable microscopy may mimic other neoplasms, and a wide spectrum of diseases should be considered in the differential diagnosis.
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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) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".