Table 1. Summary of clinical features and immunohistochemistry of the 22 cases of soft tissue tumours with epithelioid morphology.

IHC: Immunohistochemistry; INI 1: Integrase interactor 1; EMA: Epithelial membrane antigen; HMB-45: Human melanoma black; DOG1: Discovered on GIST1

Diagnosis	Number of cases (n=22)	Age (years)	Site	Size (cm)	Positive  IHC	Negative  IHC
Epithelioid Sarcoma (Conventional)	3	27 to 47	Lower extremities	5 to 25	Vimentin, cytokeratin and CD34	S100, CD99, desmin, smooth muscle actin and INI 1
Epithelioid Sarcoma (Proximal type)	2		Upper extremities
Malignant Extrarenal Rhabdoid Tumour	1	35	Scapula	4	Vimentin, cytokeratin and CD99	S100, desmin, CD34 and INI 1
Epithelioid malignant peripheral nerve sheath tumour	2	63 and 50	Chest and left leg	6 and 12	S-100 and vimentin	Cytokeratin, EMA, desmin, CD34, Melan-A and HMB-45
Epithelioid Leiomyosarcoma	1	50	Left leg		Smooth muscle actin and vimentin	Cytokeratin, CD34, S100, HMB-45 and CD117
Epithelioid angiosarcoma	3	40 to 65	Lower extremities	15 to 25	CD31 and factor VIII	Cytokeratin, EMA and desmin
Sclerosing epithelioid fibrosarcoma	1	50	Left knee	12	Vimentin	Cytokeratin, EMA, HMB45, desmin and alpha-smooth muscle actin
Epithelioid myxofibrosarcoma	3	43 to 45	Lower extremities	10 to 20	-	All negative
Epithelioid gastrointestinal stromal tumour	2	48 and 58	Stomach and ileum	12 and 21	CD117 and DOG1	Cytokeratin, EMA, HMB45, desmin and alpha-smooth muscle actin
Clear cell sarcoma	2	17 and 35	Left thigh and chest wall	10 and 6	HMB-45, neuron-specific enolase and S-100	Cytokeratin, EMA, carcinoembryonic antigen, desmin, Melan-A and smooth muscle actin
Monophasic synovial sarcoma	1	50	Inguinal region	5	Cytokeratin, EMA and vimentin	Smooth muscle actin, S100 and CD117
Malignant perivascular epithelioid cell tumour	1	50	Retroperitoneum	8	HMB45, Melan-A and actin	Cytokeratin, S100 and CD117