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Low grade fibromyxoid sarcoma (LGFMS) is an exceptional, low grade, soft tissue sarcoma with indolent biological behaviour, extensive preclinical stage, enhanced localized tumour reoccurrence and delayed, distant metastasis. As the deceptively benign neoplasm was initially scripted by Evans in 1987, the tumefaction is nomenclated as “Evan’s tumour”. Incidence of sarcomas is nearly 1% of adult malignancies wherein low grade fibromyxoid sarcoma represents roughly beneath <5% of soft tissue sarcomas 1.
Preface Fibromatosis colli is an exceptional, benign neoplasm of infancy constituted by spindle-shaped cells of sternocleidomastoid muscle. Fibromatosis colli emerges within specific sites such as distal or inferior segment of sternocleidomastoid muscle and is accompanied by diffuse enlargement of the muscle. Although nomenclated as “sternocleidomastoid tumour” or “sternocleidomastoid pseudo-tumour of infancy”, the designation is a misnomer, as the condition is non neoplastic although it may be denominated as a congenital fibrotic disorder.
Perineurioma is an exceptional, benign neoplasm entirely composed of neoplastic perineurial cells and arises from the peripheral nerve. Pertaining to location, the neoplasm predominantly demonstrates configurations such as intra-neural or extra-neural, confined to the soft tissue. Perineurioma was initially scripted by Lazarus and Trombetta in 1978 and is additionally nomenclated as localized hypertrophic neuropathy1. Extra-neural soft tissue perineurioma and mucosal (intestinal) perineurioma are frequent, in contrast to intra-neural perineurioma or localized hypertrophic neuropathy subtype12.