This is a case of a mass growing at the back of the thigh, p | Figure 1

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This is a case of a mass growing at the back of the thigh, painless for some time, was operated on twice. The growth became massive with excruciating pain. Histopathology showed it's a malignant growth after tampering with it surgically in a tertiary hospital. Any likely diagnosis, treatment and prognosis.

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16 yrs old F, Complain from Rt thigh swelling for more than 1 yrs ... Went to medical stuff, wrong Dx as simple infection give hr an antibiotic ... but no any benefit ... Went to Medical clinic .. in east baghdad .. Dx as cellulitis .. the patient received antibiotic injection .. for 2 wks .. but no any benefit ... The swelling progression ... the patient came to me on Ex .. i send hr to MRI for thigh .. MRI said suspected sarcoma ... FNA upon .. show case of High grad rhabdomyosarcoma ... 😔 & on evaluation show multi 2nd metastasis to Lung , Pelvic space, and Multi Lns. Plz dear Dr. Don’t forget the young age swelling and relation with SOFT Tissue Sarcoma ... and the FNA can establish the Dx ....

Axial (Image 1) and coronal (Images 2 and 3) T2-weighted MRI show a large pelvic soft tissue mass (arrow), which displaces the bladder and causes obstruction leading to hydronephrosis and hydroureter (dashed arrow). Rhabdomyosarcoma is the most common soft tissue malignancy in the pediatric pelvis. The tumor most commonly originates from the bladder, uterus, vagina, or prostate.

Axial and coronal T2 weighted MRI shows a biliary rhabdomyosarcoma (arrow) and dilation of the intrahepatic bile ducts (arrowhead). Biliary rhabdomyosarcoma is the most common tumor causing obstructive jaundice in a child. However, it is an incredibly rare tumor accounting for approximately 1% of all rhabdomyosarcomas in children.

Coronal (Image 1) and sagittal (Images 2 and 3) contrast-enhanced CT scans delineate an avidly enhancing nasopharyngeal mass (arrow), typical of juvenile nasopharyngeal angiofibroma. Although benign, these vascular tumors are notorious for locally invasive growth into nasal structures. The differential diagnosis of a pediatric nasal cavity mass includes olfactory neuroblastoma, rhabdomyosarcoma, and antrochoanal polyp, among others.