Your browser doesn't support javascript.
Show: 20 | 50 | 100
Results 1 - 1 de 1
Filter
1.
Ann Diagn Pathol ; 54: 151800, 2021 Oct.
Article in English | MEDLINE | ID: covidwho-1321982

ABSTRACT

BACKGROUND: Challenging emerging entities with distinctive molecular signatures may benefit from algorithms for diagnostic work-up. METHODS: Fusion sarcomas (2020-2021, during pandemic) were diagnosed by clinicoradiology, morphology, phenotype, and next-generation sequencing (NGS). RESULTS: Six fusion sarcomas in two males and four females involved the chest-wall, neck, or extremities; ages ranged 2-73, median 18 years. Sizes ranged 5.3-25.0, median 9.1 cm. These include high grade 1) TPR-NTRK1 of proximal femur with a larger rounded soft tissue mass, previously considered osteosarcoma yet without convincing tumor matrix. A pathologic fracture necessitated emergency hemipelvectomy (NED) and 2) novel KANK1-NTRK2 sarcoma of bone and soft tissue with spindled pleomorphic to epithelioid features (AWD metastases). 3) Novel ERC1-ALK unaligned fusion, a low grade infiltrative deep soft tissue hand sarcoma with prominent-vascularity, myopericytoid/lipofibromatosis-like ovoid cells, and collagenized stroma, was successfully treated with ALK-inhibitor (Crizotinib), avoiding amputation. These NTRK and ALK tumors variably express S100 and CD34 and were negative for SOX10. 4) and 5) CIC-DUX4 round cell tumors (rapid metastases/demise), one with COVID superinfection, were previously treated as Ewing sarcoma. These demonstrated mild pleomorphism and necrosis, variable myxoid change and CD99 reactivity, and a distinctive dot-like-Golgi WT1 immunostaining pattern. 6) A chest wall/thoracic round cell sarcoma, focal CD34/ keratins/CK7, revealed nuclear-STAT6, STAT6-NAB2 by NGS, confirming malignant solitary fibrous tumor, intermediate-risk-stratification (AWD metastases). CONCLUSIONS: Recent fusion sarcomas include new KANK1-NTRK2 and ERC1-ALK, the latter successfully treated by targeted-therapy. ALK/NTRK fusion partners TPR and KANK1 suggest unusual high-grade morphology/behavior. Clinicoradiologic, morphologic, and phenotypic algorithms can prompt molecular-targeted immunostains or NGS for final classification and promising inhibitor therapy.


Subject(s)
Biomarkers, Tumor/genetics , Femoral Neoplasms/genetics , Gene Fusion , Head and Neck Neoplasms/genetics , Sarcoma/genetics , Soft Tissue Neoplasms/genetics , Thoracic Neoplasms/genetics , Adolescent , Adult , Aged , Algorithms , Antineoplastic Agents/therapeutic use , Child , Child, Preschool , Extremities/pathology , Female , Femoral Neoplasms/diagnosis , Femoral Neoplasms/drug therapy , Femoral Neoplasms/pathology , Head and Neck Neoplasms/diagnosis , Head and Neck Neoplasms/drug therapy , Head and Neck Neoplasms/pathology , High-Throughput Nucleotide Sequencing , Humans , Male , Middle Aged , Neoplasm Grading , Phenotype , Prognosis , Sarcoma/diagnosis , Sarcoma/drug therapy , Sarcoma/pathology , Soft Tissue Neoplasms/diagnosis , Soft Tissue Neoplasms/drug therapy , Soft Tissue Neoplasms/pathology , Thoracic Neoplasms/diagnosis , Thoracic Neoplasms/drug therapy , Thoracic Neoplasms/pathology , Thoracic Wall/pathology , Young Adult
SELECTION OF CITATIONS
SEARCH DETAIL
...