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Orbital Metastasis as Initial Clinical Presentation in a Patient of Hepatocellular Carcinoma – A Rare Case with Review of Literature

CC BY-NC-ND 4.0 ? Indian J Med Paediatr Oncol 2021; 42(04): 385-389

DOI: DOI: 10.1055/s-0041-1736682

Abstract

Orbital metastasis, as the initial clinical presentation in hepatocellular carcinoma (HCC), is a rare manifestation. A 66-year-old male patient presented with a history of protrusion of the eyeballs, double vision, and swelling over the left side of the head for 8 months. Magnetic resonance imaging of the brain with orbit revealed a heterogeneous lesion in the left frontal lobe causing its destruction with intraorbital and intracranial extension. Triphasic contrast-enhanced computed tomography was suggestive of multiple hypodense areas in both lobes of the liver. Tissue diagnosis from the liver was suggestive of HCC. A diagnosis of multifocal HCC with orbital metastasis was made. The patient was treated with palliative radiotherapy and sorafenib. Orbital metastasis in HCC is rare. Prognosis is somber in such cases. The treatment should focus on providing palliation from symptoms.

Keywords

hepatocellular carcinoma - metastasis - orbital - palliation - radiotherapy

Publication History

Publication Date:
10 December 2021 (online)

? 2021. Indian Society of Medical and Paediatric Oncology. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Thieme Medical and Scientific Publishers Private Ltd.
A-12, Second Floor, Sector -2, NOIDA -201301, India


Abstract

Orbital metastasis, as the initial clinical presentation in hepatocellular carcinoma (HCC), is a rare manifestation. A 66-year-old male patient presented with a history of protrusion of the eyeballs, double vision, and swelling over the left side of the head for 8 months. Magnetic resonance imaging of the brain with orbit revealed a heterogeneous lesion in the left frontal lobe causing its destruction with intraorbital and intracranial extension. Triphasic contrast-enhanced computed tomography was suggestive of multiple hypodense areas in both lobes of the liver. Tissue diagnosis from the liver was suggestive of HCC. A diagnosis of multifocal HCC with orbital metastasis was made. The patient was treated with palliative radiotherapy and sorafenib. Orbital metastasis in HCC is rare. Prognosis is somber in such cases. The treatment should focus on providing palliation from symptoms.

Keywords

hepatocellular carcinoma - metastasis - orbital - palliation - radiotherapy

Introduction

Orbital metastases are relatively uncommon accounting for 1 to 13% of all orbital tumors and occur in 2 to 5% of cancer patients.[1] [2] [3] [4] Hepatocellular carcinoma (HCC) is an aggressive malignancy, with 50 to 75% of patients developing metastases during the course of their disease.[5] [6] The most common sites of metastasis are the regional lymph nodes and lungs. The less common sites of distant metastases include bone, brain, adrenal glands, and skin.[5] [7] [8]

The common malignancies metastasizing to the orbit are breast, lung, prostate, kidney, thyroid, and gastrointestinal.[1] [9] [10] [11] Orbital metastasis from HCC is a rare presentation with only a handful of cases reported in the literature. Herein, we report a rare case of orbital metastasis as the initial clinical presentation in a patient with HCC with a brief review of the literature.

Case Report

A 66-year-old male patient presented with a history of protrusion of the eyeballs, double vision, and swelling over the left side of the head for 8 months. There was no history of jaundice, awareness of mass anywhere else in the body, loss of weight, and loss of appetite. On clinical examination, left eye proptosis with reduced visual acuity and conjunctival chemosis was present. A soft-tissue swelling measuring 4 cm ? 4 cm was present in the left frontal region and orbit. Abdominal examination revealed hepatomegaly. The differential diagnosis at this stage included primary orbital neoplasm or metastatic tumor to the orbit. Baseline investigations including hemogram and kidney function tests were normal. Bilirubin was within normal limits, but liver enzymes were raised (aspartate transaminase: 87.3 U/L, alanine transaminase: 93.17 U/L, and alkaline phosphatase: 223 U/L). Serum ? fetoprotein was found to be elevated (1000 ng/mL). Peripheral blood film examination did not show any abnormality. The patient tested positive for hepatitis C antibody. Magnetic resonance imaging (MRI) of the brain with orbit revealed a heterogeneous lesion in the left frontal lobe causing its destruction with intraorbital and intracranial extension ([Fig. 1]). Contrast-enhanced computed tomography of the chest was normal, and a triphasic scan of the abdomen showed multiple arterial hypervascular lesions in both lobes of the liver with washout in venous and delayed phases, suggestive of multifocal HCC. The largest lesion measured 2.5 cm ? 3.2 cm in the right lobe of the liver ([Fig. 2]). Multiple, small, similar arterial hypervascular lesions were seen in both lobes of the liver. Ultrasound-guided fine-needle aspiration cytology from the liver was suggestive of HCC ([Fig. 3]). The patient was treated with palliative radiotherapy of 30 Gy in 10 fractions to the left eye. The patient was subsequently started on sorafenib. MRI of the brain including the orbit was done after 3 months of radiotherapy, which revealed a significant reduction in the size of the lesion. Four months later, the patient developed lung metastasis and left iliac bone metastasis. He was given palliative radiotherapy of 20 Gy in five fractions to the left iliac bone, following which he had significant pain relief. The patient was given the option of second-line treatment with immune checkpoint inhibitors or second-line tyrosine kinase inhibitors, but he refused due to cost issues. The patient received intravenous zoledronic acid for 3 months. The patient is alive with progressive disease and is on palliative care.

|?Fig. 1?Magnetic resonance imaging of the brain with orbit showing a heterogeneous lesion in the left frontal lobe causing its destruction with intraorbital and intracranial extensions.|

|?Fig. 3?The tumor cells were highly pleomorphic with coarse chromatin, prominent nucleoli, and moderate amount of cytoplasm. These tumor cells showed prominent cytoplasmic and nuclear vacuoles, and some of them showed intracytoplasmic bile pigment and intranuclear inclusions.|

|?Fig. 2?Contrast-enhanced computed tomography (CECT) showing a lesion in segment VI of the liver with small lesions in both lobes of the liver.|

Discussion

Metastasis to the orbit is a rare presentation in HCC. Breast constitutes the most common primary site, with 28 to 70% of orbital metastasis.[11] The common presenting symptoms of orbital metastases include diminished vision, pain, proptosis, double vision, awareness of mass, and limitation of extraocular movements. The differential diagnosis includes vascular lesions; lymphoproliferative lesions; tumors of the lacrimal gland and optic nerve; and metastatic tumors from the breast, lung, prostate, thyroid, and orbital chloroma in patients with acute myeloid leukemia or chronic myeloid leukemia.

The presence of orbital metastasis in HCC predicts a poor prognosis. In a series of 100 patients by Lubin et al,[12] the breast was the most common site in 53% of the patients, followed by the prostate in 12% and lungs in 8%. The most common clinical findings were limited to ocular motility (54%), proptosis (50%), and palpable mass (43%). The mean survival time after the orbital diagnosis was 20 months. Patients with metastatic carcinoid tumors had the longest mean survival (60 months) and patients with breast cancer had the second-longest mean survival (22 months) after diagnosis of orbital metastasis. In a series of 93 patients of orbital metastasis by Magliozzi et al,[2] HCC was the primary site in only one patient. Orbital metastases occur unilaterally in more than 90% of the patients.[11] To the best of our knowledge, 33 cases have been reported in the literature including case reports and series.[2] [5] [6] [6] [7] [8] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] Most of the patients were in the sixth and seventh decades of life.

Orbital metastasis, as the initial manifestation of disease, was present in 22 out of 33 patients ([Table 1]). Our patient also presented with orbital metastasis as the initial presentation of the disease. A detailed history and thorough ophthalmic and general physical examination must be done in patients with orbital metastasis. Prompt referral to an oncologist is necessary for patients who present with orbital metastasis as the initial manifestation of the disease to rule out primary at the earliest. Radiological investigations such as computed tomography and MRI are the principal means of evaluating orbital lesions. The potential risks of performing a biopsy of an orbital mass such as visual loss, bleeding, and diplopia, should always be weighed against the potential benefits, evaluating whether the management options are going to change as a result of the biopsy.

Author

Year

Number of cases

Age

Gender

Orbital metastasis as the first manifestation of disease

Outcome

Lubin et al[12]

1980

1

69

Male

Yes

Alive

Zubler et al[13]

1981

1

64

Male

Yes

Died after 3 months

Wakisaka et al[14]

1990

1

58

Male

Yes

Died after 11 months

Phanthumchinda and Hemachuda[15]

1992

1

29

Female

Yes

Not mentioned

Kami et al[16]

1994

1

60

Male

Yes

Died after 3 months

Tranfa et al[19]

1994

1

85

Male

Yes

Not mentioned

Schwab et al[20]

1994

1

19

Male

Yes

Died 1 month

Hosokawa et al[21]

1994

1

70

Male

No

Not mentioned

Loo et al[22]

1994

1

71

Female

Yes

Lost to follow-up after 3 months

Font et al[23]

1998

1

79

Female

Yes

Alive

Scolyer et al[24]

1999

1

78

Male

No

Not mentioned

Kim et al[7]

2000

1

56

Female

Yes

Died after 2 months

Chen et al[25]

2003

1

69

Male

Yes

Orbital mass regressed

Oida et al[26]

2006

1

72

Male

No

Died after 4 months

Machado-Netto et al[17]

2006

1

57

Male

Yes

Died after 15 months

Srinivasan and Krishnanand[5]

2007

1

76

Female

Yes

Not mentioned

Hirunwiwatkul et al[8]

2008

1

74

Female

Yes

Died after 2 months

Pitts et al[27]

2008

2

61

47

Female

Male

Yes

Yes

Both patients died with progressive disease

Fonseca J?nior et al[28]

2008

1

57

Male

Yes

Died after 15 months

Quick et al[6]

2009

1

52

Male

No

Alive 20 months

Kolarevi? et al[29]

2011

1

70

Male

No

Died after 6 months

Mustapha and Madachi[30]

2011

1

25

Male

No

Not mentioned

Guerriero et al[31]

2011

1

45

Male

No

Not mentioned

Eldesouky et al[18]

2014

6

Range 47?70 Mean age 60.2 years

Male

3 cases

Survival of five cases ranged between 8 and 13 months with a mean of 10.2 (?2.3) months. One patient was receiving treatment (diagnosed for 6 months)

T?llez-Villajos et al[32]

2015

1

70

Female

No

Alive at 4 months

Madabhavi et al[33]

2020

1

72

Male

Yes

Alive at 7 months with stable disease

Protopapa et al[34]

2020

1

53

Male

Yes

Discharged after radiotherapy with little improvement

The intent of treatment in patients presenting with orbital metastasis is palliative as such metastasis suggests a hematogenous spread of disease. The aim of the treatment is to maximize the quality of life of such patients and to preserve visual function if possible. Radiotherapy is the mainstay of treatment in such patients as it will cause shrinkage of the lesion, control of symptoms, and visual preservation. Surgical resection is appropriate only in selected patients.

Orbital metastasis in HCC is rare. A high index of suspicion is required as proptosis and diplopia were the first manifestations of disease in the index case. Clinicians should be aware of such presentations. Prognosis in such patients remains dismal. The treatment should focus on providing relief from symptoms of the illness. Radiotherapy plays an important role in downsizing the lesion and symptom control.

Conflict of Interest

None declared.

Declaration of Patient Consent

The authors certify that they have obtained all appropriate patient consent forms.

References

  1. hmad SM, Esmaeli B.?Metastatic tumors of the orbit and ocular adnexa. Curr Opin Ophthalmol 2007; 18 (05) 405-413
  2. agliozzi P, Strianese D, Bonavolont? P. et al?Orbital metastases in Italy. Int J Ophthalmol 2015; 8 (05) 1018-1023
  3. onavolont? G, Strianese D, Grassi P. et al?An analysis of 2,480 space-occupying lesions of the orbit from 1976 to 2011. Ophthal Plast Reconstr Surg 2013; 29 (02) 79-86
  4. llen RC.?Orbital metastases: when to suspect? When to biopsy?. Middle East Afr J Ophthalmol 2018; 25 (02) 60-64
  5. rinivasan R, Krishnanand G.?Cytologic diagnosis of metastatic hepatocellular carcinoma presenting as an orbital mass. A case report. Acta Cytol 2007; 51 (01) 83-85
  6. uick AM, Bloomston M, Kim EY, Hall NC, Mayr NA.?Complete response to radiation therapy of orbital metastasis from hepatocellular carcinoma. World J Gastroenterol 2009; 15 (47) 6000-6003
  7. im IT, Na SC, Jung BY.?Hepatocellular carcinoma metastatic to the orbit. Korean J Ophthalmol 2000; 14 (02) 97-102
  8. irunwiwatkul P, Tirakunwichcha S, Meesuaypong P, Shuangshoti S.?Orbital metastasis of hepatocellular carcinoma. J Neuroophthalmol 2008; 28 (01) 47-50
  9. alenzuela AA, Archibald CW, Fleming B. et al?Orbital metastasis: clinical features, management and outcome. Orbit 2009; 28 (2-3) 153-159
  10. Shikishima K, Kawai K, Kitahara K.?Pathological evaluation of orbital tumours in Japan: analysis of a large case series and 1379 cases reported in the Japanese literature. Clin Exp Ophthalmol 2006; 34 (03) 239-244
  11. Shields JA, Shields CL, Brotman HK.?Carvalho C, Perez N, Eagle RC Jr. Cancer metastatic to the orbit: the 2000 Robert M. Curts lecture. Ophthal Plast Reconstr Surg 2001; 17 (05) 346-354
  12. Lubin JR, Grove AS Jr, Zakov ZN, Albert DM.?Hepatoma metastatic to the orbit. Am J Ophthalmol 1980; 89 (02) 268-273
  13. Zubler MA, Rivera R, Lane M.?Hepatoma presenting as a retro-orbital metastasis. Cancer 1981; 48 (08) 1883-1885
  14. Wakisaka S, Tashiro M, Nakano S, Kita T, Kisanuki H, Kinoshita K.?Intracranial and orbital metastasis of hepatocellular carcinoma: report of two cases. Neurosurgery 1990; 26 (05) 863-866
  15. Phanthumchinda K, Hemachuda T.?Superior orbital fissure syndrome as a presenting symptom in hepatocellular carcinoma. J Med Assoc Thai 1991; 74 (12) 679-682
  16. Kami H, Wada M, Matsuura T. et al?Case of hepatocellular carcinoma with an orbital metastasis as the initial symptom [article in Japanese]. Nippon Naika Gakkai Zasshi 1994; 83 (04) 622-624
  17. Machado-Netto MC, Lacerda EC, Heinke T, Maia DC, Lowen MS, Saad ED.?Massive orbital metastasis of hepatocellular carcinoma. Clinics (S?o Paulo 2006; 61 (04) 359-362
  18. Eldesouky MA, Elbakary MA, Shalaby OE, Shareef MM.?Orbital metastasis from hepatocellular carcinoma: report of 6 cases. Ophthal Plast Reconstr Surg 2014; 30 (04) e78-e82
  19. Tranfa F, Cennamo G, Rosa N, De Rosa G, Boscaino A, Bonavolont? G.?An unusual orbital lesion: hepatoma metastatic to the orbit. Ophthalmologica 1994; 208 (06) 329-332
  20. Schwab L, Doshi H, Shields JA, Kagame K, Chana H.?Hepatocellular carcinoma metastatic to the orbit in an African patient. Ophthalmic Surg 1994; 25 (02) 105-106
  21. Hosokawa C, Kawabe J, Okamura T. et al?Usefulness of 99mTc-PMT SPECT and 18F-FDG PET in diagnosing orbital metastasis of hepatocellular carcinoma [article in Japnese]. Kaku Igaku 1994; 31 (10) 1237-1242
  22. Loo KT, Tsui WM, Chung KH, Ho LC, Tang SK, Tse CH.?Hepatocellular carcinoma metastasizing to the brain and orbit: report of three cases. Pathology 1994; 26 (02) 119-122
  23. Font RL, Maturi RK, Small RG, Garcia-Rojas M.?Hepatocellular carcinoma metastatic to the orbit. Arch Ophthalmol 1998; 116 (07) 942-945
  24. Scolyer RA, Painter DM, Harper CG, Lee CS.?Hepatocellular carcinoma metastasizing to the orbit diagnosed by fine needle aspiration cytology. Pathology 1999; 31 (04) 350-353
  25. Chen PH, Po HL, Lin YJ. Hseuh IH, Huang JK?Painful ophthalmoplegia as the initial manifestation of hepatocellular carcinoma: a case report and literature review. Acta Neurol Taiwan 2003; 12: 93-96
  26. Oida Y, Ohtani Y, Dowaki S. et al?Hepatocellular carcinoma metastatic to the orbit: a case report. Tokai J Exp Clin Med 2006; 31 (01) 7-10
  27. Pitts J, Chang CH, Mavrikakis I, Shaikh A, Rootman J.?Hepatocellular carcinoma presenting as orbital bone metastasis. Ophthal Plast Reconstr Surg 2008; 24 (06) 477-479
  28. Fonseca J?nior NL, Frizon L, Paves L, Wolosker AM, Manso PG.?An unusual orbital metastatic lesion: the only finding in a case of hepatocellular carcinoma: case report [article in Portuguese]. Arq Bras Oftalmol 2008; 71 (06) 865-867
  29. Kolarevi? D, Tomasevi? Z, Borici? I. et al?Metastasis of hepatocellular carcinoma presented as a tumor of the maxillary sinus and retrobulbar tumor. Vojnosanit Pregl 2011; 68 (04) 359-362
  30. Mustapha SK, Madachi DA.?Orbital metastasis of hepatocellular carcinoma: a case report. West Afr J Med 2011; 30 (04) 305-307
  31. Guerriero S, Infante G, Giancipoli E. et al?Hepatocellular carcinoma metastasis to the orbit in a coinfected HIV+ HBV+ patient previously treated with orthotopic liver transplantation: A case report. Case Rep Ophthalmol Med 2011; 549270
  32. T?llez-Villajos L, Maroto-Castellanos M, Lled?-Navarro JL, L?pez-Dur?n S, Moreira-Vicente V, Albillos-Mart?nez A.?Orbital metastasis from hepatocellular carcinoma. Rev Esp Enferm Dig 2015; 107 (04) 231
  33. Madabhavi I, Ks S, Dharmarajan Lethika R. et al?Intraconal metastasis leading to diagnosis of hepatocellular carcinoma. Middle East J Dig Dis 2020; 12 (01) 48-51
  34. Protopapa MN, Lagadinou M, Papagiannis T, Gogos CA, Solomou EE.?Hepatocellular carcinoma: An uncommon metastasis in the orbit. Case Rep Oncol Med 2020; 7526042

Address for correspondence

Divya Khosla, MD Radiotherapy
Department of Radiotherapy, Regional Cancer Centre, Postgraduate Institute of Medical Education and Research
Chandigarh
India???

Publication History

Publication Date:
10 December 2021 (online)

? 2021. Indian Society of Medical and Paediatric Oncology. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Thieme Medical and Scientific Publishers Private Ltd.
A-12, Second Floor, Sector -2, NOIDA -201301, India

|?Fig. 1?Magnetic resonance imaging of the brain with orbit showing a heterogeneous lesion in the left frontal lobe causing its destruction with intraorbital and intracranial extensions.|

|?Fig. 3?The tumor cells were highly pleomorphic with coarse chromatin, prominent nucleoli, and moderate amount of cytoplasm. These tumor cells showed prominent cytoplasmic and nuclear vacuoles, and some of them showed intracytoplasmic bile pigment and intranuclear inclusions.|

|?Fig. 2?Contrast-enhanced computed tomography (CECT) showing a lesion in segment VI of the liver with small lesions in both lobes of the liver.|

References

  1. hmad SM, Esmaeli B.?Metastatic tumors of the orbit and ocular adnexa. Curr Opin Ophthalmol 2007; 18 (05) 405-413
  2. agliozzi P, Strianese D, Bonavolont? P. et al?Orbital metastases in Italy. Int J Ophthalmol 2015; 8 (05) 1018-1023
  3. onavolont? G, Strianese D, Grassi P. et al?An analysis of 2,480 space-occupying lesions of the orbit from 1976 to 2011. Ophthal Plast Reconstr Surg 2013; 29 (02) 79-86
  4. llen RC.?Orbital metastases: when to suspect? When to biopsy?. Middle East Afr J Ophthalmol 2018; 25 (02) 60-64
  5. rinivasan R, Krishnanand G.?Cytologic diagnosis of metastatic hepatocellular carcinoma presenting as an orbital mass. A case report. Acta Cytol 2007; 51 (01) 83-85
  6. uick AM, Bloomston M, Kim EY, Hall NC, Mayr NA.?Complete response to radiation therapy of orbital metastasis from hepatocellular carcinoma. World J Gastroenterol 2009; 15 (47) 6000-6003
  7. im IT, Na SC, Jung BY.?Hepatocellular carcinoma metastatic to the orbit. Korean J Ophthalmol 2000; 14 (02) 97-102
  8. irunwiwatkul P, Tirakunwichcha S, Meesuaypong P, Shuangshoti S.?Orbital metastasis of hepatocellular carcinoma. J Neuroophthalmol 2008; 28 (01) 47-50
  9. alenzuela AA, Archibald CW, Fleming B. et al?Orbital metastasis: clinical features, management and outcome. Orbit 2009; 28 (2-3) 153-159
  10. Shikishima K, Kawai K, Kitahara K.?Pathological evaluation of orbital tumours in Japan: analysis of a large case series and 1379 cases reported in the Japanese literature. Clin Exp Ophthalmol 2006; 34 (03) 239-244
  11. Shields JA, Shields CL, Brotman HK.?Carvalho C, Perez N, Eagle RC Jr. Cancer metastatic to the orbit: the 2000 Robert M. Curts lecture. Ophthal Plast Reconstr Surg 2001; 17 (05) 346-354
  12. Lubin JR, Grove AS Jr, Zakov ZN, Albert DM.?Hepatoma metastatic to the orbit. Am J Ophthalmol 1980; 89 (02) 268-273
  13. Zubler MA, Rivera R, Lane M.?Hepatoma presenting as a retro-orbital metastasis. Cancer 1981; 48 (08) 1883-1885
  14. Wakisaka S, Tashiro M, Nakano S, Kita T, Kisanuki H, Kinoshita K.?Intracranial and orbital metastasis of hepatocellular carcinoma: report of two cases. Neurosurgery 1990; 26 (05) 863-866
  15. Phanthumchinda K, Hemachuda T.?Superior orbital fissure syndrome as a presenting symptom in hepatocellular carcinoma. J Med Assoc Thai 1991; 74 (12) 679-682
  16. Kami H, Wada M, Matsuura T. et al?Case of hepatocellular carcinoma with an orbital metastasis as the initial symptom [article in Japanese]. Nippon Naika Gakkai Zasshi 1994; 83 (04) 622-624
  17. Machado-Netto MC, Lacerda EC, Heinke T, Maia DC, Lowen MS, Saad ED.?Massive orbital metastasis of hepatocellular carcinoma. Clinics (S?o Paulo 2006; 61 (04) 359-362
  18. Eldesouky MA, Elbakary MA, Shalaby OE, Shareef MM.?Orbital metastasis from hepatocellular carcinoma: report of 6 cases. Ophthal Plast Reconstr Surg 2014; 30 (04) e78-e82
  19. Tranfa F, Cennamo G, Rosa N, De Rosa G, Boscaino A, Bonavolont? G.?An unusual orbital lesion: hepatoma metastatic to the orbit. Ophthalmologica 1994; 208 (06) 329-332
  20. Schwab L, Doshi H, Shields JA, Kagame K, Chana H.?Hepatocellular carcinoma metastatic to the orbit in an African patient. Ophthalmic Surg 1994; 25 (02) 105-106
  21. Hosokawa C, Kawabe J, Okamura T. et al?Usefulness of 99mTc-PMT SPECT and 18F-FDG PET in diagnosing orbital metastasis of hepatocellular carcinoma [article in Japnese]. Kaku Igaku 1994; 31 (10) 1237-1242
  22. Loo KT, Tsui WM, Chung KH, Ho LC, Tang SK, Tse CH.?Hepatocellular carcinoma metastasizing to the brain and orbit: report of three cases. Pathology 1994; 26 (02) 119-122
  23. Font RL, Maturi RK, Small RG, Garcia-Rojas M.?Hepatocellular carcinoma metastatic to the orbit. Arch Ophthalmol 1998; 116 (07) 942-945
  24. Scolyer RA, Painter DM, Harper CG, Lee CS.?Hepatocellular carcinoma metastasizing to the orbit diagnosed by fine needle aspiration cytology. Pathology 1999; 31 (04) 350-353
  25. Chen PH, Po HL, Lin YJ. Hseuh IH, Huang JK?Painful ophthalmoplegia as the initial manifestation of hepatocellular carcinoma: a case report and literature review. Acta Neurol Taiwan 2003; 12: 93-96
  26. Oida Y, Ohtani Y, Dowaki S. et al?Hepatocellular carcinoma metastatic to the orbit: a case report. Tokai J Exp Clin Med 2006; 31 (01) 7-10
  27. Pitts J, Chang CH, Mavrikakis I, Shaikh A, Rootman J.?Hepatocellular carcinoma presenting as orbital bone metastasis. Ophthal Plast Reconstr Surg 2008; 24 (06) 477-479
  28. Fonseca J?nior NL, Frizon L, Paves L, Wolosker AM, Manso PG.?An unusual orbital metastatic lesion: the only finding in a case of hepatocellular carcinoma: case report [article in Portuguese]. Arq Bras Oftalmol 2008; 71 (06) 865-867
  29. Kolarevi? D, Tomasevi? Z, Borici? I. et al?Metastasis of hepatocellular carcinoma presented as a tumor of the maxillary sinus and retrobulbar tumor. Vojnosanit Pregl 2011; 68 (04) 359-362
  30. Mustapha SK, Madachi DA.?Orbital metastasis of hepatocellular carcinoma: a case report. West Afr J Med 2011; 30 (04) 305-307
  31. Guerriero S, Infante G, Giancipoli E. et al?Hepatocellular carcinoma metastasis to the orbit in a coinfected HIV+ HBV+ patient previously treated with orthotopic liver transplantation: A case report. Case Rep Ophthalmol Med 2011; 549270
  32. 32?T?llez-Villajos L, Maroto-Castellanos M, Lled?-Navarro JL, L?pez-Dur?n S, Moreira-Vicente V, Albillos-Mart?nez A.?Orbital metastasis from hepatocellular carcinoma. Rev Esp Enferm Dig 2015; 107 (04) 231
  33. Madabhavi I, Ks S, Dharmarajan Lethika R. et al?Intraconal metastasis leading to diagnosis of hepatocellular carcinoma. Middle East J Dig Dis 2020; 12 (01) 48-51
  34. Protopapa MN, Lagadinou M, Papagiannis T, Gogos CA, Solomou EE.?Hepatocellular carcinoma: An uncommon metastasis in the orbit. Case Rep Oncol Med 2020; 7526042