Pediatric Soft tissue ultrasound - Subcutaneous femur lesion

Parents of 3 years-old child came to the public clinic with complaints about the mass in the outer surface of the upper third of femur founded a few days ago accidentally because the child began to itch there, injury or anything else explaining the nature of mass they denied.
Visually, in this field there is a spot of pigmentation to 5 mm, at palpation determined the area of tissues consolidation by the type of tendon running in lengthwise axis of the body, painless on palpation.
On US visualized heteroechogenic lesion, predominantly hypoechoic with hyperechoic microlesions (microcalcifications?) and hyperechoic area around (infiltration?), with irregular shape and border, at DPD richly blood supplied, 2.5x0.7 cm in size(dif.diagnosis: myxoma, desmoid tumor/benign fibromatosis, mts, basal cell carcinoma, liposarcoma, etc.)
Recommended consultation of the surgeon, oncologist.
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https://en.uzgraph.ru/forum/ul....trasound-cases/0/239
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