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Erschienen in: European Journal of Medical Research 1/2015

Open Access 01.12.2015 | Case report

Hepatic endometriosis: a rare case and review of the literature

verfasst von: Kai Liu, Wei Zhang, Songyang Liu, Bingfei Dong, Yahui Liu

Erschienen in: European Journal of Medical Research | Ausgabe 1/2015

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Abstract

Hepatic endometriosis is one of the rarest disorders characterized by the presence of ectopic endometrium in the liver. To our knowledge, only 21 cases of hepatic endometrioma have been described in the medical literature. We report a case of a 36-year-old primiparous female with hepatic endometriosis forming a large cystic mass. The patient presented once with severe right quadrant pain as her only symptom and no history of endometriosis. Complete blood count and biochemical tests were normal. Abdominal ultrasonography and computed tomography scans suggested the presence of a 6.5 × 6.0 cm cystic mass in segment III of the liver. The mass was completely removed by local liver resection. The intraoperative frozen sections suggested a diagnosis of hepatic endometriosis. The diagnosis was confirmed through histological immunostaining without intrinsic abnormality. A preoperative diagnosis of hepatic endometriosis is made on the basis of considering the possibility in advance. Hepatic endometriosis should be considered in the differential diagnosis of a cystic liver mass despite conducting exhaustive investigations in the absence of characteristic clinical and radiological features. Histological examination is essential, and surgery remains the treatment of choice.
Hinweise

Competing interests

The authors declare that they have no conflict of interests.

Authors’ contributions

KL and YL were responsible for the conception and design of the study. KL, YW, FT and YT were responsible for the acquisition of data. KL, YW, and FT drafted the manuscript. All authors participated in interpretation of the findings. KL and YL revised and commented on the draft, and all authors read and approved the final version of the manuscript. All authors confirm that the content has not been published elsewhere and does not overlap with or duplicate their previously published work.

Background

Endometriosis is a benign condition most commonly noted in the uterus, fallopian tubes, ovaries, and local pelvic peritoneum [1]. It affects approximately 10% of women of reproductive age and 2.5% of postmenopausal women [2]. However, endometriotic lesions have also been described in almost all other remote organs of the human body, including the omentum, gastrointestinal tract, peritoneum, operative scars, lymph nodes, umbilicus, skin, lungs, pleura, bladder, kidneys, pancreas, and even in males [3]. Hepatic endometriosis, one of the rarest forms of atypical endometriosis, was first described in 1986 [4]. To our knowledge, only 21 cases of hepatic endometriosis have been previously reported in the literature. We herein describe the 22nd case of hepatic endometriosis and evaluate the current literature addressing the diagnosis of hepatic endometriosis focusing on advances in the clinical manifestation, pathogenesis, and diagnostic workup.

Case presentation

A 36-year-old woman, primigravida, consulted our hospital for investigation of a cystic hepatic lesion in August 2013. The patient had no history of endometriosis. Half a year previously, the patient had presented with severe right quadrant pain in the midnight which only lasted for 3 h just before menstruation. An upper abdominal ultrasound showed a 6-cm lesion within the left lobe of the liver. The patient was diagnosed with a hepatic cystic mass in segment III of the left lobe. A laparotomy had been considered and postponed since the patient had managed to cope with her symptoms. The patient refused further treatment at that moment. The patient was not currently undergoing menopause. The patient had no exposure to hepatotoxic drugs, estrogens, progestins, or oral contraceptives. There were no other significant symptoms. On physical examination, no definite abdominal mass lesion was palpable and no lymphadenopathy was noted. Complete blood count was within normal range as were the liver function tests. Serological tests for hepatitis B surface antigen and anti-hepatitis C virus antibodies were negative. The tumor markers (carcino-embryonic antigen, carbohydrate antigen 19-9, alpha-fetal protein, carbohydrate antigen 125) were normal, as was the routine lab work. A preoperative computed tomography scan showed a well-circumscribed cystic lesion of 6.5 × 6.0 cm located in segment III (Figure 1). The wall appeared thick with complex septate. A preoperative tentative diagnosis included liver cystadenoma or liver cystadenocarcinoma.
An exploratory operation was performed, which revealed a large cystic tumor occupying segment III of the liver (Figure 2). There was no evidence of metastases. Biopsies were taken from the cyst wall, and the intraoperative frozen section histology suggested a diagnosis of hepatic endometriosis. The endometriosis was completely removed by a pericystectomy. An abdominal cavity exploration revealed no other pathologic events. The pelvis was examined and no evidence of endometriosis was found. We did not detect any other abnormalities during the operation. The patient made an uneventful recovery and was discharged on the ninth postoperative day. After 3 months of follow-up, the patient is asymptomatic with no evidence of recurrent disease.
Histopathology analysis revealed a lobulated cyst with adjacent normal hepatic parenchyma. The cyst wall was partially composed of endometrial glandular and stromal elements (Figure 3a), characteristic of endometriosis. Immunostaining of the stromal cell and epithelial cells expressed strong coloring for estrogen and progesterone receptor (Figure 3b,c). This was further confirmed by positive immunostaining of CD10, CK7, as well as HepPar-1, which proved the epithelial origin of the cyst (Figure 3d,e,f). Since no atypical cells were detected, we concluded the diagnosis to be benign intrahepatic endometriosis.

Discussion

Endometriosis is defined as the presence of endometrial-like tissue outside the uterus, which induces a chronic, inflammatory reaction [1]. It affects approximately 10% of women of reproductive age and 2.5% of postmenopausal women, from all ethnic and social groups [2]. Although clinical and imaging features of typical endometriosis within the pelvis can be highly suggestive, the gold standard for diagnosis is based on the histologic examination of appropriately sampled tissue [5]. Endometriosis was first described by Rokitansky in 1860. The most commonly affected sites are the pelvic organs (ovaries, fallopian tubes, uterosacral ligaments, Pouch of Douglas) and peritoneum, although other parts of the body such as the lungs are occasionally affected. However, endometriotic lesions have also been described in some other unusual remote organs of the human body, including the omentum, gastrointestinal tract, operative scars, lymph nodes, umbilicus, skin, pleura, bladder, kidneys, pancreas, and even in males [3, 6].
However, the mechanism by which endometriosis is involved is still largely unknown. Significant effort has been undertaken to identify potential causes in the development of endometriosis, including retrograde menstruation, coelomic metaplasia, iatrogenic injury, and hematogenous or lymphatic dissemination [7]. Retrograde menstruation is believed to cause transcoelomic spread and implantation within the pelvis due to its predilection for gravity-dependent pelvic deposits in most observed lesions. However, this theory cannot explain distant and intraparenchymal lesions in atypical cases while the haematogenous or lymphatic dissemination may offer a better explanation for these atypical locations. The possible transportation of endometrial fragments is based on these vessels as vehicles in a fashion analogous to metastatic spread of neoplasm. The coelomic metaplasia may be, at least in part, due to chronic inflammation, hormonal alternation, or trauma to promote endometriosis and that might be amenable to disruption in the male or heart [6, 8]. However, laboratory findings and clinical data of hepatic endometriosis fell short of metaplasia theory as most of the hepatic lesions are intraparenchymal.
Hepatic endometriosis, first described by Finkel et al. in 1986, is an extremely rare disorder characterized by the presence of ectopic endometrial tissue in the liver [4]. The first reported patient was a 21-year-old female who presented with epigastric pain, nausea, and vomiting. The patient was found to have an endometrial cyst measuring 13 cm in diameter located in the left lobe of the liver. Subsequently, 21 cases of this rare form of endometriosis have been described in the medical literature. All cases of previously reported hepatic endometrioma and our present case are presented in Table 1. In our present case, the patient had no history of endometriosis or previous pelvic operation. By profiling the clinical and biological properties of the hepatic lesion, we may therefore identify vascular dissemination whose importance in hepatic intraparenchymal endometriosis was poorly recognized. We have now determined that in our case, the liver maybe a transportation target of endometrial fragments by lymphatic or blood vessels.
Table 1
Feature of reported cases of hepatic endometriosis in literature
Reference
Age (years)
Liver involvement
Endometrial history
Pre-operation diagnosis
Treatment
Finkel et al. [4]
21
Left lobe
No
No
Cyst enucleation
Grabb et al. [9]
21
Left lobe
No
No
Deroofing + danazol
Rovati et al. [10]
37
Left lobe
Yes
Yes
Segmentectomy + danazol
Verbeke et al. [11]
62
Left lobe
No
No
Excision
Verbeke et al. [11]
34
Right lobe
No
No
Right hepatectomy
Chung et al. [12]
40
Left lobe
Yes
No
Segmentectomy
Weinfeld et al. [13]
60
Right lobe
Yes
No
Left hepatectomy + excision
Inal et al. [14]
25
Right lobe
Yes
No
Danazol
N’senda et al. [15]
54
Right lobe
No
Yes
Right hepatectomy
Huang et al. [16]
56
Left lobe
Yes
No
Left hepatectomy
Jeanes et al. [17]
31
Bilobar
Yes
Yes
Right hepatectomy
Khan et al. [18]
31
Bilobar
Yes
Yes
Right hepatectomy + goserelin
Khan et al. [18]
59
Right lobe
Yes
Yes
Right hepatectomy
Tuech et al. [19]
42
Right lobe
No
No
Excision
Reid et al. [20]
46
Right lobe
Yes
No
Right hepatectomy + goserelin
Groves et al. [21]
52
Right lobe
No
No
Right hepatectomy
Goldsmith et al. [22]
48
Left lobe
Yes
No
Non anatomical resection
Asran et al. [23]
61
Bilobar
Yes
Yes
Unknown
Schuld et al. [24]
39
Right lobe
No
No
Segmentectomy
Fluegen et al. [25]
32
Right lobe
No
No
Pericystectomy
Rivkine et al. [26]
51
Left lobe
No
No
Left hepatectomy
Liu et al., this study
36
Left lobe
No
No
Pericystectomy
The clinical, biological, and morphological characteristics of hepatic endometriosis need to be reported in the literature to allow for the creation of a better diagnostic approach. These reported data suggest that, no specific diagnostic marker may be sufficient to isolate hepatic endometriosis from hepatic lesions except a histological examination, despite conducting a complete investigation, in the absence of clinical and radiological characteristics. Prospective identification of hepatic endometriosis has limitations that contribute to the controversy surrounding their existence. Although transhepatic biopsy for hepatic endometriosis have been sufficient to differentiate other hepatic lesions, it is difficult to make a preoperative diagnosis for the majority of hepatic endometriosis patients due to the potential adverse effects often available after transhepatic biopsy review. It is therefore enticing to suggest that systematic use of intraoperative frozen sections should be useful to avoid radical hepatectomy in order to decrease morbidity and mortality.
Hepatic endometrioma should always be considered in the differential diagnosis for a woman of any age presenting with a hepatic mass, with or without previous endometriosis history. The diagnosis is made on the basis of a histological examination, and a pericystectomy has been recommended.

Conclusions

In summary, our 36-year-old Chinese primiparous female with hepatic endometriosis forming a large cystic mass was diagnosed with endometriosis through histological immunostaining without intrinsic abnormality. Our present case suggested that the liver maybe a transportation target of endometrial fragments by lymphatic or blood vessels, which provides a theoretical basis for the complex mechanisms of endometriosis.
Written informed consent was obtained from the patient for publication of this case report and any accompanying images.

Acknowledgements

This work was supported by grants from the Development and Reform Commission of Jilin Province (Grant No. 20130023-6).
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://​creativecommons.​org/​licenses/​by/​4.​0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://​creativecommons.​org/​publicdomain/​zero/​1.​0/​) applies to the data made available in this article, unless otherwise stated.

Competing interests

The authors declare that they have no conflict of interests.

Authors’ contributions

KL and YL were responsible for the conception and design of the study. KL, YW, FT and YT were responsible for the acquisition of data. KL, YW, and FT drafted the manuscript. All authors participated in interpretation of the findings. KL and YL revised and commented on the draft, and all authors read and approved the final version of the manuscript. All authors confirm that the content has not been published elsewhere and does not overlap with or duplicate their previously published work.
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Metadaten
Titel
Hepatic endometriosis: a rare case and review of the literature
verfasst von
Kai Liu
Wei Zhang
Songyang Liu
Bingfei Dong
Yahui Liu
Publikationsdatum
01.12.2015
Verlag
BioMed Central
Erschienen in
European Journal of Medical Research / Ausgabe 1/2015
Elektronische ISSN: 2047-783X
DOI
https://doi.org/10.1186/s40001-015-0137-1

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