HighlightsNodular Fasciitis, also known as infiltrative or pseudosarcomatous fasciitis, is a benign soft tissue tumour of fibroblastic/myofibroblastic differentiation.Magnetic Resonance Imaging was done and showed an irregular mass in the right axilla in the muscular- subcutaneous plane measuring 10.8 × 8.8 × 12 cm.Positive staining with alpha smooth muscle actin(SMA) is a feature of nodular fasciitis suggesting a myofibroblastic differentiation and less possibility of a sarcoma.Treatment options include, observation, as spontaneous regression has been reported, intra-lesional steroid or wide local excision.Magnetic Resonance Imaging along with histopathology and immunohistochemistry are key to diagnosis.
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