Goblet Cell Carcinoid Is a Morphologic Variant of Appendiceal Mucinous Neoplasms: Lesson From Concurrent Dissemination in Pseudomyxoma Peritonei
Bibliographic record
Abstract
The nature and histogenesis of goblet cell carcinoid (GCC) is still inconclusive. Coexistence of appendiceal GCC and mucinous cystadenoma is reported in rare cases. In our experience, a concurrent dissemination of GCC and various appendiceal mucinous neoplasms (AMNs) is sometimes seen in the development of pseudomyxoma peritonei (PP), suggesting a link between these entities. This case series describes the association of these different morphologies. Nine cases of PP (4 men, 5 women;, 32-73 years old) treated with surgical cytoreduction were assessed for morphologic components characteristic of GCC, low-grade mucinous neoplasm (LMN), mucinous adenocarcinoma (MCA), and nonmucinous conventional adenomcarcinoma (NMCA) as defined by the WHO classification. The number of different specimens involved by each component was counted in each case. The extent of each component was semiquantitated (0, none; 1, seen in <1 HPF; 2, seen in >1 HPF to 1 LPF; 3, seen in 1-3 LPFs; 4, seen in >3 LPFs). In 6 cases, a primary appendiceal tumor was identified (2 GCC, 1 GCC + MCA, 2 GCC + MCA + NMCA, 1 NMCA). In the remaining 3 cases, the appendix was missing, and no histologic data of previous appendectomy were available. GCC and/or other components were coexistent at different sites in variable combinations. Overall, GCC was the predominant morphology. GCC is coexistent with various mucinous neoplasms (low-and high-grade) or conventional adenocarcinoma in the evolution of PP secondary to AMN. The histologic grade of the primary appendiceal tumor and that of its metastasis are often discordant. Any AMN can present with a wide morphologic spectrum in a single case. Tumor stem cells of any AMN have potential to switch tumor differentiation into different and multiple lineages without site or stage specificity, and GCC can be considered a morphologic variant of malignant AMN.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".