TY - JOUR
T1 - Cutaneous Atypical Fibroxanthoma with Osteoclast-Like Giant Cell
T2 - A Rare but Diagnostic Pitfall
AU - Shaker, Nada
AU - Phelps, Robert
AU - Niedt, George
AU - Patel, Ankush
AU - Wu, Douglas
AU - Aung, Phyu
AU - Prieto, Victor
AU - Church, Ann
AU - Pradhan, Dinesh
N1 - Publisher Copyright:
© 2023 Lippincott Williams and Wilkins. All rights reserved.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - Background:Atypical fibroxanthoma (AFX) is a dermal-based, low-grade neoplasm with no specific lineage of differentiation. The occurrence of AFX with osteoclast-like giant cells is exceptionally rare. Less than 20 cases have been reported in the literature.Case Presentation:A 77-year-old man with a medical history of multiple basal and squamous cell carcinomas of the skin, presented with a progressively growing erythematous nodule on the sun-damaged right central parietal scalp. A shave biopsy showed a dermal spindle cell proliferation accompanied by numerous osteoclast-like multinucleated giant cells and predominant atypical mitotic figures. The immunohistochemical staining showed a diffuse positive staining for CD68 and SMA, patchy staining for CD10, and negative staining for SOX-10, pan-cytokeratin, CK5/6, S100, CD34, and desmin. The tumor was completely excised with negative margins. A subsequent follow-up over a period of 13 months showed no recurrence.Conclusion:Distinguishing AFX with osteoclast-like giant cells from both malignant and benign skin lesions with osteoclast-like giant cells is crucial. Although AFX tumors display worrisome malignant histologic features, most cases have a favorable prognosis with a local recurrence rate below 5% and exceedingly rare metastasis.
AB - Background:Atypical fibroxanthoma (AFX) is a dermal-based, low-grade neoplasm with no specific lineage of differentiation. The occurrence of AFX with osteoclast-like giant cells is exceptionally rare. Less than 20 cases have been reported in the literature.Case Presentation:A 77-year-old man with a medical history of multiple basal and squamous cell carcinomas of the skin, presented with a progressively growing erythematous nodule on the sun-damaged right central parietal scalp. A shave biopsy showed a dermal spindle cell proliferation accompanied by numerous osteoclast-like multinucleated giant cells and predominant atypical mitotic figures. The immunohistochemical staining showed a diffuse positive staining for CD68 and SMA, patchy staining for CD10, and negative staining for SOX-10, pan-cytokeratin, CK5/6, S100, CD34, and desmin. The tumor was completely excised with negative margins. A subsequent follow-up over a period of 13 months showed no recurrence.Conclusion:Distinguishing AFX with osteoclast-like giant cells from both malignant and benign skin lesions with osteoclast-like giant cells is crucial. Although AFX tumors display worrisome malignant histologic features, most cases have a favorable prognosis with a local recurrence rate below 5% and exceedingly rare metastasis.
KW - atypical fibroxanthoma
KW - low potential malignant skin lesions
KW - osteoclast-like giant cell
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U2 - 10.1097/DAD.0000000000002508
DO - 10.1097/DAD.0000000000002508
M3 - Article
C2 - 37708369
AN - SCOPUS:85171901062
SN - 0193-1091
VL - 45
SP - 704
EP - 707
JO - American Journal of Dermatopathology
JF - American Journal of Dermatopathology
IS - 10
ER -