Introduction A rare malignant slow-growing, nodular, soft tissue tumor often mistaken for a benign granulomatous process. Age & location occurs in adolescents and young adults (ages 10-35 years) 2:1 male to female ratio most common soft tissue sarcoma of the hand and wrist also occurs in forearm, buttock/thigh, knee, and foot mass is deep or superficial may ulcerate and mimic skin carcinoma, rheumatoid nodule, or granuloma when superficial may be attached to tendons, tendon sheaths, or fascia when deep Genetics unknown Malignancy regional lymph node metastases common systemic metastasis to lungs can occur Prognosis extremely poor Symptoms Symptoms small, firm, painless, slow growing mass commonly occurring in the upper extremity Physical exam 3-6 cm firm, painless mass may have skin ulceration Imaging Radiographs calcification occurs within the lesion in 10-20% erosion of adjacent bone is sometimes found MRI indeterminate in appearance dark on T1 bright on T2 tendon sheath nodule may be visualized Histology Characteristics nodular pattern with central necrosis within granulomatous areas epithelial appearance with ovoid or polygonal cells with eosinophilic cytoplasm dense, hyalinized collagen deposits intercellularly cellular pleomorphism is rare keratin-positive staining Treatment Operative wide excision with adjuvant radiotherapy indication all operable tumors technique perform sentinel node biopsy to evaluate for regional lymph node metastasis outcomes high rate of multiple recurrences if mistaken for a benign lesion and inadequately excised re-excision of the tumor bed is recommended for inadequate initial resection amputation indications may be necessary to prevent spread of disease in cases of multiple recurrences
QUESTIONS 1 of 5 1 2 3 4 5 Previous Next Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (SBQ05PA.3) Figure A shows the clinical photo of a 28-year-old homeless man who presents with a left thumb mass which has been present for the last three years. He reports having a similar mass that was excised at an outside hospital 5 years earlier. A biopsy of the mass is taken, and the histopathology is shown in Figures B and C. What is the most likely diagnosis? Tested Concept QID: 1988 FIGURES: A B C Type & Select Correct Answer 1 Rheumatoid nodule 2% (22/1042) 2 Squamous cell carcinoma 39% (404/1042) 3 Epithelioid sarcoma 51% (533/1042) 4 Angiosarcoma 5% (48/1042) 5 Epidermal inclusion cyst 3% (30/1042) L 4 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review tested concept
All Videos (1) Podcasts (0) Login to View Community Videos Login to View Community Videos Epithelioid Sarcoma - Pathology Rounds General - Epithelioid Sarcoma D 11/17/2012 759 views 5.0 (4)