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A unique collision tumor in breast invasive ductal carcinoma and mucosa-aaociated lymphoid tissue lymphoma.
Collision tumors, such as the case presented here, provide a unique opportunity for side-by-side comparison of the pathologic features that help distinguish these 2 entities and circumvent the quality control issues that arise when immunohistochemical and other staining patterns are compared between specimens on different slides.
Besides the advantages in using immunohistochemistry to distinguish one metastatic focus from another in a collision tumor, these same principles can be applied to genitourinary tumors in the bladder neck region.
Clearly, immunohistochemical staining is a valuable tool for assessing all types of collision tumors, from both the genitourinary tract and other organ systems.
This is a rare and unique entity of collision tumors of RCC coexisting with IVL.
To our knowledge, this is the first report of these unusual collision tumors in the English literature.
Malignant neoplasms originating from 2 or more distinct topographic organs form a collision tumor Four instances of collision tumor of the male urogenital tract in which prostatic carcinoma was one of the components have been described.
In summary, to our knowledge this is the first reported case of a collision tumor (malignant triton tumor and ependymoma) at this anatomic location.
Collision tumors are the incidental coexistence of 2 separate malignant neoplasms that occur in proximity to each other.
In one cage, the anaplastic carcinoma wag closely apposed to malignant lymphoma, large cell type, of B-cell Phenotype; this case was considered to represent a collision tumor.
1,3,5,6) Similar occurrence in other organs has also been hypothesized as possible collision tumors or secondary to a totipotential stem cell capable of epithelial and mesenchymal differentiation.
Comparison of the genetic alterations in two epithelial collision tumors of the uterine cervix: a report of two cases.
1, 2) According to Lewin and Appelman, (1) mixed endocrine and nonendocrine carcinomas of the stomach should be classified in 5 distinct groups, including carcinomas with interspersed endocrine cells, carcinoids with interspersed nonendocrine cells, composite glandular-endocrine carcinomas, collision tumors, amphicrine tumors,
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