A rare low-grade myofibroblastic sarcoma in lower jaw with the resemblance to benign lesions.

Schwerzmann, Martina C; Dettmer, Matthias S; Baumhoer, Daniel; Iizuka, Tateyuki; Suter, Valérie (2022). A rare low-grade myofibroblastic sarcoma in lower jaw with the resemblance to benign lesions. BMC Oral Health, 22(1), p. 380. BioMed Central 10.1186/s12903-022-02381-1

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BACKGROUND

Low-grade myofibroblastic sarcoma (LGMS) is a rare solid infiltrative soft tissue tumor with a predilection for the head and neck region.

CASE PRESENTATION

We report the diagnostic steps of a fast-growing lesion of the lower left jaw in a 45-year-old otherwise healthy woman. A first biopsy and subsequent histopathological examination showed potential differentials of a benign myofibroma, benign nodular fasciitis or an LGMS. This diagnostic overlap was a challenge for the decision of the further treatment approach. The treatment consisted of a segmental en bloc resection of the mandible including the second premolar, first and second molar. Histopathological examination of the resected tumor confirmed an LGMS.

CONCLUSION

The histopathologic resemblance of LGMS to a range of benign and reactive tumors may lead to misdiagnosis and mistreatment. The rarity of LGMS explains the lack of established treatment protocols. This case shows the importance of adequate clinical decisions, expertise in the histopathology of rare tumors and interdisciplinary exchange to achieve state-of-the-art patient management.

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