Pleomorphic hyalinizing angiectatic tumor with a sarcomatous component recurring as high-grade myxofibrosarcoma
| Autor: | Michal Pavlovsky, Petr Mukensnabl, Michal Michal, Dmitry V. Kazakov |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Hyalin
Pathology medicine.medical_specialty Skin Neoplasms Stromal cell Mitotic index Biology Pathology and Forensic Medicine Lesion Necrosis medicine Humans Neoplasm Aged Skin Fibrin Dermatofibrosarcoma Soft tissue Sarcoma Myxofibrosarcoma General Medicine medicine.disease Axilla medicine.anatomical_structure Female Neoplasm Recurrence Local medicine.symptom |
| Zdroj: | Pathology International. 57:281-284 |
| ISSN: | 1440-1827 1320-5463 |
| DOI: | 10.1111/j.1440-1827.2007.02094.x |
| Popis: | Pleomorphic hyalinizing angiectatic tumor (PHAT) of the soft tissue is a rare distinctive tumor listed as a benign neoplasm in the new World Health Organization classification. It may recur and most reported recurrent tumors retained the typical morphological appearance of PHAT; rare tumors recurred with the appearance of a sarcoma. Reported herein is an additional example of recurrent PHAT, but in contrast to the previously described cases the present tumor morphologically qualified as a sarcoma from the very beginning; it recurred as a high-grade myxofibrosarcoma. A 76-year-old woman presented with a solitary subcutaneous tumor in the axilla that was surgically removed. Seven months later, the patient experienced a local recurrence. Microscopically, the typical features of PHAT were identified in the initial lesion, namely hyalinized, fibrin-containing vessels and pleomorphic stromal cells; there were areas of hemorrhage and necrosis. Additionally, peripherally located areas of the tumor manifested highly pleomorphic cells with frequent atypical mitoses, producing a sarcomatous appearance. The mitotic index in the sarcomatous part was 1/10 high-power fields (HPF). Hyalinized, fibrin-containing vessels were absent in these sarcomatous areas, and the stroma was myxoid. The recurrent lesion was composed of large highly pleomorphic oval, round, spindled or bizarre cells with a high mitotic rate, ranging from 3/10 HPF to 7/10 HPF. The neoplastic cells were arranged haphazardly in a myxoid matrix. Hyalinized, fibrin-containing vessels typical for PHAT were absent. PHAT may be more aggressive than previously thought, and PHAT may encompass a morphological spectrum of the lesion ranging from benign to malignant. |
| Databáze: | OpenAIRE |
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