High-grade Follicular Lymphomas Exhibit Clinicopathologic, Cytogenetic, and Molecular Diversity Extending Beyond Grades 3A and 3B

Although follicular lymphoma (FL) is usually graded as FL1-2, FL3A, and FL3B, some borderline cases can be observed and led us to investigate the clinicopathologic diversity of grade 3 FL (FL3). Among 2449 FL patients enrolled in Lymphoma Study Association (LYSA) trials, 1921 cases with sufficient material underwent a central pathologic review. The resulting diagnoses comprised 89.6% FL1-2 (n=1723), 7.2% FL3A (n=138), and 0.5% purely follicular FL3B (n=9). The remaining 51 unclassifiable cases (2.7%) exhibited high-grade features but did not meet WHO criteria for either FL3A or FL3B; and were considered as “unconventional” high-grade FL (FL3U). FL3U morphological pattern consisted of nodular proliferation of large cleaved cells or small-sized to medium-sized blast cells. Compared with FL3A, FL3U exhibited higher MUM1 and Ki67 expression, less BCL2 breaks and more BCL6 rearrangements, together with a higher number of cases without any BCL2, BCL6 or MYC rearrangement. FL3U harbored less frequent mutations in BCL2, KMT2D, KMT2B, and CREBBP than FL3A. MYC and BCL2 were less frequently mutated in FL3U than FL3B. Rituximab cyclophosphamide, doxorubicin, vincristine, and prednisone treated FL3U patients had a worse survival than FL1-2 patients with similar follicular lymphoma international prognostic index and treatment. These results suggest that high-grade FLs encompass a heterogeneous spectrum of tumors with variable morphology and genomic alterations, including FL3U ...
Source: The American Journal of Surgical Pathology - Category: Pathology Tags: Original Articles Source Type: research

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Inflammatory myofibroblastic tumors (IMTs) are spindle cell neoplasms of intermediate (borderline) biologic potential with tendency for local recurrence but low risk of metastasis. They affect children more than adults. The most common sites of involvement are the lung, soft tissue, peritoneum, bladder, and less commonly the gynecologic tract. IMTs are characterized by spindle to epithelioid cells with myofibroblastic differentiation, some degree of smooth muscle differentiation, myxoid stroma and usually associated with brisk lymphoplasmacytic infiltrates. In about half of the cases, IMTs are associated with rearrangement...
Source: International Journal of Gynecological Pathology - Category: Pathology Tags: Pathology of the Corpus: Case Reports Source Type: research
AbstractTwo sessions in the workshop of the 19th meeting of the European Association for Haematopathology termed “challenging extranodal lymphoproliferations” and “extranodal non-site-specific lymphoproliferations”, dealt with a series of heterogenous cases. These included lymphoproliferations of all cell lineages, from reactive lesions mimicking lymphomas through indolent lymphoid neoplasia and tumour s with unclear biological behaviour to aggressive and transformed lymphomas. The themes addressed included cases with borderline features between hyperplastic and neoplastic lesions, the diagnostic sp...
Source: Virchows Archiv - Category: Pathology Source Type: research
ConclusionsPositive findings in abdominopelvic washing cytology is rare. The majority of the positive cases were from müllerian origins, with ovary and uterus as the most common sites. Endometrial adenocarcinoma, endometrioid type and ovarian high-grade serous carcinoma were the most common tumor types. Knowing prior history of malignancy, morphologic comparison with concurrent surgical cases, and performing ancillary studies are keys to improve diagnostic accuracy of abdominopelvic washings.
Source: Journal of the American Society of Cytopathology - Category: Cytology Source Type: research
ConclusionsPositive findings in abdominopelvic washing cytology is rare. The majority of the positive cases were from müllerian origins with ovary and uterus as the most common sites. Endometrial adenocarcinoma, endometrioid type and ovarian high grade serous carcinoma were the most common tumor types. Knowing prior history of malignancy, morphological comparison with concurrent surgical cases and performing ancillary studies are keys to improve diagnostic accuracy of abdominopelvic washings.
Source: Journal of the American Society of Cytopathology - Category: Cytology Source Type: research
Conclusion: Adequate frontline treatment policy is vital for achieving an optimal balance between efficacy and toxicity. Current staging systems have a weak correlation with metabolic tumor burden: one-third of those recognized as advanced stage have the low burden, and vice versa about a half of intermediate-risk pts have high tumor burden. Combination of TMTV/TLG and cytokines can be currently used for decision making in borderline stage cases and probably could serve as a backbone for a new staging system in the future.Acknowledgement: IGA_LF_2018_004, MH CZ-DRO (FNOL, 00098892)DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - Category: Hematology Authors: Tags: 624. Hodgkin Lymphoma and T/NK Cell Lymphoma-Clinical Studies: Poster II Source Type: research
We examined the prognostic impact of baseline PET metabolic imaging from the randomized BIONIC study for pts with untreated HR FL.Methods: The BIONIC study conducted by the ECOG-ACRIN Cancer Research Group enrolled untreated grade I/II or IIIa FL pts with HR disease defined as GELF high tumor burden and/or FLIPI score of 3-5. Pts were randomized to: a) standard BR induction x 6 followed by maintenance rituximab (MR) q 2 months x 2 years vs b) bortezomib + BR x 6 followed by MR q 2 months x 2 years vs c) BR x 6 followed by q 2 months MR x 2 years + lenalidomide given concurrently with the first year of MR. Survival analyses...
Source: Blood - Category: Hematology Authors: Tags: 623. Mantle Cell, Follicular, and Other Indolent B-Cell Lymphoma-Clinical Studies: Poster I Source Type: research
This study was supported by grants from the Fonds National de la Recherche Scientifique de Belgique (FNRS –PDR Convention T.0077.14, Télévie Grant 7.4590.16 awarded to Rossella Masciangelo, and Grant 5/4/150/5 awarded to Marie-Madeleine Dolmans), the Fonds Speciaux de Recherche, and the Foundation Against Cancer. None of the authors have any conflicting interests to declare.
Source: Human Reproduction - Category: Reproduction Medicine Source Type: research
Author Affiliations open 1 McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Canada 2 Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain 3 Universitat Pompeu Fabra (UPF), Barcelona, Spain 4 CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain 5 School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Canada 6 Epidemiology Research Program, American Cancer Society, Atlanta, Georgia, USA 7 Department of Economics, Brigham Young University, Provo, Utah, USA 8 Population Studies Division, Health Canada, Ottawa, Cana...
Source: EHP Research - Category: Environmental Health Authors: Tags: Research Source Type: research
CONCLUSION: Our study confirms that ALK rearrangements in ATC are rare and that the mutational landscape of ATC is heterogeneous, involving many genes implicated in the follicular epithelial cell dedifferentiation process. This may explain the limited effectiveness of targeted therapeutic options tested so far. PMID: 28351340 [PubMed - as supplied by publisher]
Source: Thyroid : official journal of the American Thyroid Association - Category: Endocrinology Tags: Thyroid Source Type: research
A 71-year-old woman, previously treated for malignant lymphoma, was admitted to our hospital with a tumor in the right breast. The tumor size was 2.0 cm in diameter, and the borderline was unclear. The core needle biopsy material revealed an invasive adenocarcinoma with metaplastic change. Right mastectomy and sentinel lymph node biopsy was performed. Histologically, the tumor was composed of mucus-secreting, epidermoid, and intermediate cells. These findings confirmed the diagnosis as mucoepidermoid carcinoma (MEC) of the breast. MEC is more frequently observed in the salivary glands and occurs rarely in the breast, with ...
Source: Case Reports in Oncology - Category: Cancer & Oncology Source Type: research
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