|Year : 2021 | Volume
| Issue : 5 | Page : 136-139
|Primary Ewings sarcoma in liver - A rare case report with review of literature
Anjali Sharma1, Neha Sethi1, Shashikant Saini2, Kirti Pandia1, Ritu Jangir1
1 Department of Pathology, BMCHRC, Jaipur, Rajasthan, India
2 Department of Surgical Oncology, BMCHRC, Jaipur, Rajasthan, India
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|Date of Submission||11-Apr-2019|
|Date of Decision||23-Jul-2019|
|Date of Acceptance||29-Aug-2019|
|Date of Web Publication||7-Jun-2021|
| Abstract|| |
Ewing's sarcoma family of tumours include both peripheral primitive neuroectodermal tumour (PNET) and Ewing's sarcoma including both intraosseous and extra osseous sites. Rarest of all is the involvement of liver as primary site, of which only 4 case reports have been published. We report a very rare case of 4 year old male child with primary Ewing's Sarcoma in the liver along with review of literature. The child presented with pain abdomen and low grade fever and hepatomegaly. On putting extensive IHC panel on liver SOL biopsy the small round cells were positive for FLI-1 & CD99 & were immunonegative for OCH, LCA, AFP, WT1, NSE, MYOGENIN, B-catenin & glypican 3. The histopathological and immunohistochemical profile was suggestive of Ewing's Sarcoma. To our knowledge, this is the fifth reported case of Ewing's Sarcoma occurring in liver as primary & first case to be present in a young boy of 4 years age.
Keywords: Ewings, FLI 1, liver, PNET
|How to cite this article:|
Sharma A, Sethi N, Saini S, Pandia K, Jangir R. Primary Ewings sarcoma in liver - A rare case report with review of literature. Indian J Pathol Microbiol 2021;64:136-9
|How to cite this URL:|
Sharma A, Sethi N, Saini S, Pandia K, Jangir R. Primary Ewings sarcoma in liver - A rare case report with review of literature. Indian J Pathol Microbiol [serial online] 2021 [cited 2021 Jun 13];64:136-9. Available from: https://www.ijpmonline.org/text.asp?2021/64/5/136/317909
| Introduction|| |
Ewing's sarcoma family of tumors include both peripheral primitive neuroectodermal tumor (PNET) and Ewing's sarcoma that affects both intraosseous and extraosseous sites. They primarily arise in bones but are extraosseous in only about 6% of cases. Common extra osseous site of involvement are deep soft tissues of extremities, retro peritoneum, and chest wall. Rarely do they involve kidney, uterus, and GIT. Rarest of all is the involvement of liver as primary site, of which only four case reports have been published.
We report a very rare case of 4-year-old male child with primary Ewing's Sarcoma in the liver along with review of literature.
| Case Report|| |
A 4-year-old child presented with pain abdomen and low grade fever. There was no history of weight loss, but there was loss of appetite. His physical examination showed moderate hepatomegaly and tenderness. He was admitted for routine investigation in which his liver enzymes were markedly raised (SGOT 2417.80 and SGPT 2914.70 IU/mL) with negative Hepatitis B surface antigen and antibody and normal levels of serum tumor markers AFP and CEA.
WBC count was mildly raised. Bone marrow aspiration and bone marrow biopsy examination was normal.
USG abdomen revealed a large heterogeneously hypo echoic lesion in liver with exophytic lobulated cystic component with internal septations in left lobe measuring 10.2 × 7 × 6.2 cm. Mild ascitic fluid was also noted.
CECT abdomen revealed a mass of size 110 × 100 × 60 mm, abutting left lobe of liver with likely loss of fat planes. Lesion showed areas of necrosis and calcification.
Ultrasound-guided FNAC showed presence of malignant round cells and a provisional diagnosis of hepatoblastoma was made. But definite diagnosis was deffered to biopsy and IHC. On putting extensive IHC panel on liver SOL biopsy, the small round cells [Figure 1] were positive for FLI-1 [Figure 2] and CD99 [Figure 3] and were immunonegative for OCH, LCA, AFP, WT 1, NSE, MYOGENIN, B-catenin, and glypican 3. The immunohistochemical profile was suggestive of Ewings Sarcoma. Following this, further investigations including bone scan and PET scan were done to rule out any other site of involvement.
Then patient was given 8 cycles of chemotherapy (CT) Vincristine, Etoposide, and Ifosfomide.
During chemotherapy the lesion decreased in size which was detected in serial USG examination. Also, liver enzymes levels were decreased. Patient responded to chemotherapy as per CT findings.
After the therapy, patient underwent left hepatectomy and specimen was sent for HPE. Majority of tumor mass was hyalinized and necrosed with only few area showing viable small round tumor cells. Immunohistochemistry was repeated on resected specimen who showed same profile.
Postsurgery two cycles of CT - Vincristine, Etoposide, and Doxorubicine were given. Patient responded to treatment well. The timeline of patient is being incorporated in flowchart [Figure 4].
| Discussion|| |
Literature was extensively reviewed; we could find only four published cases of Ewings sarcoma primarily involving liver. Because of rarity of this entity, little information is being available regarding its behavior.
Mani et al. reported one case in 2010 of a 20-year-old Indian girl who presented with diffuse hepatomegaly without any mass lesion and with slightly raised liver enzymes.
Cambruzzi et al. in 2011 reported a case of an 18-year-old African male having solid hepatic mass lesion.
Two cases reported by Ozaki et al. in 2015 and Ates et al. in 2016 had multiloculated cystic mass lesions in liver. Both the cases were female and were between age group 20–30 years. As per literature, this is the first case of primary liver Ewings sarcoma at young age of 4 years. Due to young age, various differential diagnosis of small round cell tumors are to be kept in mind involving hepatoblastoma (small cell undifferentiated type), embryonal rhabdomyosarcoma, neuroblastoma, and lymphoblastic lymphoma.
IHC is the only tool to arrive at a conclusive diagnosis in such cases. To rule out small cell undifferentiated type of hepatoblastoma is very difficult as the tumor cells are negative for hepatic markers like AFP, OCH, and Gypican3 and Arginase.
Embryonal rhabdomyosarcoma show immunoreactivity for Myogenin and Myo D1, lymphoblastic lymphoma is also positive for CD99, which is misleading until they are proven with LCA. Neuroblastoma shows NSE, CD56, and Synaptophysin positivity.
The translocation t (11, 22) (q24; q12) is specific for Ewings Sarcoma resulting in EWS/FLI-1 fusion gene >90% of cases. This fusion gene expresses CD99 antigen (MIC-2) and FLI-1. FLI-1 antibody is very sensitive for Ewing's sarcoma, but some lymphoblastic lymphomas are also known to be positive for FLI-1 protein; however, they will be LCA immunoreactive. Rare case of DSRCT, Melanoma, and Merkel cell carcinoma show variable positivity for FLI-1 protein along with vascular tumors.
Liver involvement is usually seen as metastasis for other primary sites in Ewings sarcoma; however, liver as primary site is extremely rare. Currently, extraosseous Ewings sarcoma receives identical therapy as intraosseous Ewing's sarcoma. Thus, suggested IHC panel for round cell tumours of liver in young patient include B-catenin, LCA, CD 30, EMA, Synaptophysin, CD 99 and FLI1.
The standard treatment for Ewing's sarcoma is multimodal involving systemic chemotherapy with surgery and/or radiotherapy.
Chemotherapy include VAC/IE regimen.
Survival of Ewing's sarcoma patients depends on multiple prognostic factors such as age, metastasis at the time of diagnosis, tumor size, site, and histological response to chemotherapy.
Also, genetic transcription of fusion gene EWS/FLI-1 has good prognosis than other fusion transcripts.
EWS/PNET group of tumors are treated by different chemotherapy regimen in comparison of other round cell tumors. This group of tumor responds to chemotherapy very well and their response to therapy can be assessed in NACT cases by percentage of necrosis which has prognostic significance.
Many cases have been reported of Ewing's sarcoma involving rare extra osseous sites which have being incorporated in [Table 1].,
| Conclusion|| |
To the best of our knowledge and as per published literature, this is the fifth case of Ewings sarcoma occurring in liver as primary and first case to be present in a young boy of 4-year age. It should be considered as a differential diagnosis in young child presenting with liver mass lesion for prompt and early treatment of patient.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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Department of Pathology, BMCHRC, Jaipur, Rajasthan
Source of Support: None, Conflict of Interest: None
[Figure 1], [Figure 2], [Figure 3], [Figure 4]
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