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Aggressive behavior of anaplastic undifferentiated carcinoma arising from the hilar bile duct

Abstract

Background

Undifferentiated carcinoma of the biliary tree is extremely rare, and biliary undifferentiated carcinoma mostly originates from the gallbladder. We herein present a case of anaplastic undifferentiated carcinoma of the hilar bile duct and reviewed the literature.

Case presentation

The patient was an 81-year-old male with obstructive jaundice. Contrast-enhanced computed tomography (CT) showed a protruded tumor located at the hepatic hilum. Obstructive jaundice was relieved by endoscopic drainage. Endoscopic biopsy revealed carcinoma without glandular differentiation, and the patient was diagnosed with resectable hilar undifferentiated carcinoma. During the 5-week preoperative examination, the tumor increased in size from 23 to 45 mm. Left hemi-hepatectomy and extrahepatic bile duct resection were performed, and there were no postoperative complications. Histological findings demonstrated that the tumor was mainly composed of non-cohesive polygonal neoplasms with pleomorphic nuclei, and was diagnosed as anaplastic undifferentiated carcinoma of the common hepatic duct (T2a N0 M0 Stage II). One month after surgery, the patient was readmitted to our hospital with pyrexia due to cholangitis, and liver nodules suggestive of multiple liver metastases were detected by CT. Three months after surgery, the patient died of multiple liver metastases.

Conclusions

This is the first case report of undifferentiated cholangiocarcinoma with anaplastic features. Anaplastic undifferentiated carcinoma of the hilar bile duct showed preoperative rapid growth and early relapse despite a cancer-negative surgical margin.

Background

Biliary malignancies are commonly adenocarcinoma with various degrees of ductular differentiation. Undifferentiated carcinoma is extremely rare and displays more aggressive behavior than differentiated tumors [1,2,3,4]. The majority of reported cases of undifferentiated carcinoma in the biliary tree have been gallbladder cancer.

Various nomenclatures are used for tumors with a sarcomatoid appearance: carcinosarcoma, so-called carcinosarcoma, sarcomatoid carcinoma, and undifferentiated carcinoma. Carcinosarcoma is frequently used for tumors with both adenocarcinoma and stromal element, such as osteoid, chondroid, or rhabdoid components. So-called carcinosarcoma commonly represents tumors comprising carcinomatous and sarcomatous cells. However, the differences among these terms have not been clearly defined, and, thus, they have sometimes been confused with each other.

We encountered a case of hilar anaplastic undifferentiated carcinoma. The tumor showed exponential expansion during a preoperative assessment. Despite a cancer-negative surgical margin, the patient died due to very early liver recurrence. We herein described this case and reviewed previous cases of hilar undifferentiated carcinoma.

Case presentation

An 81-year-old male was admitted to our hospital with general malaise and brown urine. He had previous histories of hypertension, diabetes mellitus, and chronic renal failure. Laboratory blood examinations revealed elevated levels of serum aspartate aminotransferase (497 U/L, normal 13–16), alanine aminotransferase (703 U/L, normal 10–42), total bilirubin (15.3 mg/dl, normal 0.4–1.5), and carbohydrate antigen 19-9 (196 U/ml, normal 0–37).

Computed tomography (CT) and endoscopic retrograde cholangiography revealed a protruded tumor arising from the left wall of the common hepatic duct with dilation of the intrahepatic bile duct (Figs. 1A, 2). CT imaging also showed regional lymph node swelling in the hepatoduodenal ligament and supra-pancreatic area. Tumor invasion to the right hepatic artery was not identified, and distant metastasis was not detected by fluorodeoxyglucose–positron emission tomography. Endoscopic biliary drainage was performed to relieve jaundice and an endoscopic retrograde biliary drainage tube was placed into the left hepatic bile duct. Repeated endoscopic bile duct biopsies revealed malignant epithelial cells without glandular differentiation and also that the main tumor was located in the common hepatic duct. Mapping biopsy showed that the tumor extended from the hepatic duct confluence to the intrapancreatic bile duct around the superior edge of the pancreas (Bismuth type II).

Fig. 1
figure 1

Computed tomography images at presentation showed a nodular mass at the common hepatic duct (A). Imaging before surgery showed rapid tumor growth (B)

Fig. 2
figure 2

Endoscopic retrograde cholangiography revealed a protruding tumor in the hilar bile duct with intrahepatic bile duct dilatation. Repeated biopsies showed that the tumor extended from the hepatic duct confluence to the intrapancreatic bile duct around the superior edge of the pancreas. A white arrowhead shows the root of the cystic duct

The patient needed additional endoscopic biliary drainage due to the insufficient alleviation of jaundice. A preoperative tumor assessment and the amelioration of jaundice required 5 weeks, and the tumor increased in size from 23 to 45 mm during this period (Fig. 1B).

Before surgery, the indocyanine green retention rate at 15 min (ICG–15R) was 13.7% and ICG-K 0.124. The calculated remnant right liver volume was 55% by three-dimensional CT with Synapse Vincent (Fujifilm, Tokyo, JAPAN). We then planned (1) segmental bile duct resection (BDR), (2) left hemihepatectomy with extrahepatic bile resection, or (3) subtotal stomach-preserving pancreatoduodenectomy based on the intraoperative frozen section diagnosis of the bile duct stump because of the age of the patient.

During surgery, we initially collected samples of white liver nodules and para-aortic lymph nodes (station 16b1 int.), which were confirmed to be negative for malignancy in the intraoperative rapid diagnosis. After dissection of the lymph nodes in the hepatoduodenal ligament and superior- and inferior-pancreatic area, the intrapancreatic bile duct was resected 2 cm from the duodenal papilla. The distal duct stump was also negative for malignancy. We then resected the right and left hepatic bile ducts, and invasive cancer was intraoperatively confirmed in the left hepatic duct only. Left hemi-hepatectomy and caudate lobectomy with bile duct reconstruction were performed.

Pathological findings showed that the protruding nodular tumor (50 × 35 mm) was located from the common hepatic duct to the left intrahepatic bile duct (Fig. 3A, B). The tumor mainly contained pleomorphic mononuclear cells indicating undifferentiated carcinoma (more than 95% of the tumor, highlighted in red in Fig. 3C), and well-moderately differentiated adenocarcinoma was only observed around the periphery of the tumor (highlighted in blue in Fig. 3C). Biliary intraepithelial neoplasm-3 was noted from the left intrahepatic bile duct to the cystic duct (Bismuth type IIIb). There was lympho-vascular infiltration, but no lymph node metastasis. In an immunohistological analysis, the undifferentiated component was strongly positive for vimentin and weakly positive for CK AE1/AE3 (Fig. 4), but negative for Periodic Acid Schiff staining. The pathological diagnosis according to the WHO classification of tumors and the TNM staging system of UICC 8th edition was Stage II (T2a N0 M0) perihilar anaplastic undifferentiated carcinoma [5, 6].

Fig. 3
figure 3

Resected specimen of the extrahepatic bile duct. The stumps of the intrapancreatic bile duct and right hepatic duct (black arrow) were negative for malignancy. Invasive cancer was observed at the stump of the left hepatic duct (white arrowhead). The blue line shows the slice of (A). Biliary intraepithelial neoplasm-3 was widely observed in the left intrahepatic bile duct (B). The protruded tumor mainly consisted of undifferentiated carcinoma (red) and a differentiated component located in the peripheral of the nodule (blue). High-grade biliary intraepithelial neoplasms (BilIN-3) were observed around the nodule (yellow) (C)

Fig. 4
figure 4

Tumor was mainly composed of pleomorphic atypical cells without ductal formation (A H/E × 200, B H/E × 400). Cytokeratin staining was weakly positive in these cells, while vimentin expression was strongly positive (C cytokeratin × 400, D vimentin × 400). E shows the transitional area from the normal biliary epithelium to a high-grade biliary intraepithelial neoplasm in the left intrahepatic duct (BilIN-3)

The postoperative course was uneventful and the patient was discharged from hospital 23 days after surgery. One month after surgery, he was re-admitted to the hospital with cholangitis. CT imaging at that time showed liver nodules suggestive of multiple liver metastases. Due to his poor general condition, the patient was unable to receive chemotherapy for recurrence. Three months after surgery, he died of the disease.

Discussion

Undifferentiated carcinoma originating from the biliary tree is extremely rare. Undifferentiated carcinoma does not have a definitive direction of differentiation, and is microscopically characterized by a non-glandular and non-descript morphology. Various subtypes have been reported, with some mainly having the spindle cell morphology, while others comprise pleomorphic mononuclear cells [7,8,9]. Carcinosarcoma also belongs to undifferentiated carcinoma and comprises both conventional ductal adenocarcinoma and sarcomatoid elements [10]. Sarcomatoid components sometimes show heterologous differentiation.

According to the World Health Organization classification (5th edition), there is no histological definition for undifferentiated carcinoma in extrahepatic bile duct section [11]. On the other hand, by referring to pancreas sections as a counterpart of the bile duct, undifferentiated carcinomas are classified into three subtypes: anaplastic undifferentiated carcinoma, sarcomatoid undifferentiated carcinoma, and carcinosarcoma [5]. The anaplastic type is composed of at least 80% of neoplasms with pleomorphic nuclei, the sarcomatoid type is characterized by at least 80% of cells showing spindle cell features, and carcinosarcoma comprises both sarcomatoid and conventional adenocarcinoma components (each element constitutes more than 30% of the tumor). In the present case, carcinoma was mainly composed of pleomorphic mononuclear cells and differentiated adenocarcinoma was only located around the periphery of the tumor. We hypothesized that undifferentiated components came from the de-differentiation of that adenocarcinoma.

Six cases of perihilar undifferentiated carcinoma, including the present case, have been reported to date (Table 1) [12,13,14,15,16]. We searched for these cases using MEDLINE with following keywords: “undifferentiated carcinoma, sarcomatoid carcinoma, carcinosarcoma, hilar bile duct, hepatic hilum”. We retrospectively reviewed their pathological findings, and presumptively classified them based on the criteria described above. Most cases had a sarcomatoid component featured by spindle shape cells (4 sarcomatoid types and one carcinosarcoma), while one had a cartilage component. In-hospital mortality was reported for two sarcomatoid cases (liver failure and pulmonary infarction), and early tumor relapse was noted in one sarcomatoid and anaplastic cancer each (2 and 1 months after surgery, respectively). A previous review of biliary carcinosarcoma showed that patients with Stage II or more advanced extrahepatic tumors did not survive more than 3 years after surgery, and another study reported the more aggressive malignant behavior of undifferentiated carcinoma than differentiated tumors [1, 4].

Table 1 Patient characteristics with undifferentiated carcinoma of the hepatic hilus

In the present study, we applied WHO classification for subclassifying perihilar undifferentiated carcinoma. However, according to AFIP ATLAS OF TUMOR PATJOLOGY, which is another widely accepted atlas of pathology, undifferentiated carcinoma in the extrahepatic bile duct is characterized by spindle and giant malignant cells with a minor component of differentiated adenocarcinoma [17]. We think that one of the major problems to resolved in undifferentiated carcinoma is how to diagnose and classify the disease, and the diagnostic criteria of undifferentiated carcinoma vary among the referring books. Furthermore, AFIP ATLAS distinguishes extrahepatic carcinosarcoma from undifferentiated carcinoma. While whether sarcmatoid and anaplastic subtypes, and carcinosarcoma are biologically the same or not is uncertain, further research based on the same standard will be necessary to reveal the pathophysiology of the undifferentiated carcinoma.

In the distal bile duct, 10 resected cases with undifferentiated features have been reported (Table 2) [7, 9, 10, 18,19,20,21,22,23,24]. Most tumors were sarcomatoid-type carcinoma, and there was no anaplastic-type carcinoma. Kajioka et al. previously reported spindle cell-type undifferentiated carcinoma in the distal bile duct and discussed the findings of a literature review [24]. Their cases also had early tumor recurrence 2 months after curative surgery. Furthermore, patients with undifferentiated tumors with lymph node metastasis and nerve invasion died within 1 year of surgery. The aggressive tumor biology of undifferentiated carcinoma in the distal bile duct was similar to perihilar undifferentiated carcinoma.

Table 2 Patient characteristics with undifferentiated carcinoma of the distal bile duct

To the best of our knowledge, this is the first case report of anaplastic-type perihilar undifferentiated carcinoma. Anaplastic-type carcinoma has frequently been reported in pancreatic cancer to exhibit rapid growth and have an unfavorable prognosis [25]. These characteristics are consistent with the present case.

Major hepatectomy with BDR is generally selected for perihilar cholangiocarcinoma. However, undifferentiated perihilar carcinoma was often treated by segmental BDR (n = 3). This may be because sarcomatoid tumors are often nodular in shape and well-circumscribed and BDR may more easily achieve a cancer-negative margin, in contrast to biliary adenocarcinoma, which often spreads widely along the bile duct. Previous case reports showed that segmental BDR for middle bile duct cancer resulted in less postoperative morbidity, but a worse prognosis than these major surgeries [26,27,28]. Therefore, BDR needs to be considered for patients with a poor general condition. Since the present case was older than 80 years, hemi-hepatectomy and BDR were considered to be highly invasive. Therefore, we initially planned segmental BDR with the aim of achieving cancer-negative surgical margins.

In terms of non-surgical treatment for perihilar undifferentiated carcinoma, two cases reportedly received systemic chemotherapy: adjuvant chemotherapy with gemcitabine and FOLFOX6 for advanced undifferentiated carcinoma at Klatskin-position [15, 29]. The former achieved tumor-free survival of 16 months after surgery, while the latter was in complete remission for 4 years. Two cases of perihilar undifferentiated carcinoma, including the present case, had very early recurrence after surgery. It is important not to miss an opportunity for systemic chemotherapy due to surgery.

Conclusions

According to the literature search, this is the first case report of undifferentiated cholangiocarcinoma with anaplastic features. It is necessary to establish a category of anaplastic carcinoma in the classification of cholangiocarcinoma and clarify the diagnostic criteria for this rare subtype.

Availability of data and materials

Not applicable.

Abbreviations

CT:

Computed tomography

BDR:

Bile duct resection

References

  1. Ajiki T, Nakamura T, Fujino Y, Suzuki Y, Takeyama Y, Ku Y, et al. Carcinosarcoma of the gallbladder with chondroid differentiation. J Gastroenterol. 2002;37:966–71.

    Article  Google Scholar 

  2. Park HJ, Jang KT, Choi DW, Heo JS, Choi SH. Clinicopathologic analysis of undifferentiated carcinoma of the gallbladder. J Hepatobiliary Pancreat Sci. 2014;21:58–63.

    Article  Google Scholar 

  3. Guo KJ, Yamaguchi K, Enjoji M. Undifferentiated carcinoma of the gallbladder. A clinicopathologic, histochemical, and immunohistochemical study of 21 patients with a poor prognosis. Cancer. 1988;61:1872–9.

    Article  CAS  Google Scholar 

  4. Okabayashi T, Shima Y, Iwata J, Iiyama T, Sumiyoshi T, Kozuki A, et al. Surgical outcomes for 131 cases of carcinosarcoma of the hepatobiliary tract. J Gastroenterol. 2014;49:982–91.

    Article  Google Scholar 

  5. Hruban RH, AdsayNV, Esposito I, Fukushima N, Furukawa T, Kloppel G, et al. Pancreatic ductal adenocarcinoma. In WHO Classification of Tumours Editorial Board, eds. World Health Organization classification of digestive system tumours, 5th edn. Lyon: International Agency for Research on Cancer, 2019; 322–332.

  6. Brieley JD, Gospodarowicz MK, Wittekind C. International union against cancer. TNM classification of malignant tumours. 8th ed. West Sussex: Wiley-Blackwell; 2019.

    Google Scholar 

  7. Zhang S, Jia J, Bi X, Jiang Q, Zhao Y, Chen Y, et al. Sarcomatoid carcinoma of the common bile duct: a case report. Medicine (Baltimore). 2017;96:e5751.

    Article  Google Scholar 

  8. Mokuno Y, Katoh T, Yoshida K, Abe T, Maeda M, Chigira H. ndifferentiated spindle cell carcinoma of the extrahepatic bile ducts: a case report. Hepatogastroenterology. 2000;47:1234–7.

    CAS  PubMed  Google Scholar 

  9. Yoon GS, Choi DL. Sarcomatoid carcinoma of common bile duct: a case report. Hepatogastroenterology. 2004;51:106–9.

    PubMed  Google Scholar 

  10. Kadono J, Hamada N, Higashi M, Ishizaki N, Nakamura N, Sakata R. Carcinosarcoma of the extrahepatic bile duct. J Hepatobiliary Pancreat Surg. 2005;12:328–31.

    Article  Google Scholar 

  11. Roa JC, Adsay NV, Arola J, Tsui WM, Zen Y. Carcinoma of the extrahepatic bile ducts. In WHO Classification of Tumours Editorial Board, eds. World Health Organization classification of digestive system tumours, 5th edn. Lyon: International Agency for Research on Cancer, 2019; 289–291.

  12. Yuan CY, Lo HW, Tseng CH, Takasaki T, Hanyu F. A case of spindle cell sarcomatous change of hepatic ducts manifesting as obstructive jaundice. J Gastroenterol. 1995;30:264–7.

    Article  CAS  Google Scholar 

  13. Sodergren MH, Silva MA, Read-Jones SL, Hubscher SG, Mirza DF. Carcinosarcoma of the biliary tract: two case reports and a review of the literature. Eur J Gastroenterol Hepatol. 2005;17:683–5.

    Article  Google Scholar 

  14. Nakanishi Y, Ito T, Kubota K, Takeda H, Yonemori A, Kawakami H, et al. Spindle cell-type undifferentiated carcinoma of the common bile duct of the hepatic hilus: report of a case. Surg Today. 2007;37:708–12.

    Article  Google Scholar 

  15. Ide T, Miyoshi A, Kitahara K, Kai K, Noshiro H. Spindle and giant cell type undifferentiated carcinoma of the proximal bile duct. Case Rep Gastroenterol. 2012;6:33–9.

    Article  Google Scholar 

  16. Lee SY, Shia J, Kingham TP, Jarnagin WR. Carcinosarcoma of the bile duct: a case report and review of literature. Hepatobiliary Surg Nutr. 2016;5:72–8.

    Article  Google Scholar 

  17. Saavedra JA, Henson DE, Klimstra DS. Tumors of the gallbladder, extrahepatic bile ducts and vaterian system. AFIP atlas of tumor pathology, 4th series, fascicle 23. Silver Spring: ARP Press; 2015.

  18. Mokuno Y, Katoh T, Yoshida K, Abe T, Maeda M, Chigira H. Undifferentiated spindle cell carcinoma of the extrahepatic bile ducts: a case report. Hepatogastroenterology. 2000;47:1234–7.

    CAS  PubMed  Google Scholar 

  19. Nagai E, Shinohara M, Yonemasu H, Kishikawa H, Tsuneyoshi M. Undifferentiated carcinoma of the common bile duct: case report and review of the literature. J Hepatobiliary Pancreat Surg. 2002;9:627–31.

    Article  Google Scholar 

  20. Oikawa H, Oka K, Nagakura S, Fukunaga M, Sando N, Kashimura J, et al. Spindle and giant cell type undifferentiated carcinoma arising in the common bile duct: a case report. Pathol Res Pract. 2007;203:179–84.

    Article  Google Scholar 

  21. Fujikawa T, Tanaka A, Abe T, Yoshimoto H, Tokumitsu Y, Tada S, et al. Undifferentiated carcinoma of the common bile duct with intraductal tumor thrombi: report of a case. Surg Today. 2011;41:579–84.

    Article  Google Scholar 

  22. Kumei S, Onishi Y, Ogura T, Kusumoto C, Matsuno Y, Nishigami T, et al. Carcinosarcoma of the extrahepatic bile duct presenting with stone-like radiological findings. Intern Med. 2015;54:1747–51.

    Article  Google Scholar 

  23. Sasamoto S, Aoki T, Tashiro Y, Matsuda K, Koizumi T, Kusano T, et al. Experience of the pancreas duodenectomy for so-called carcinosarcoma of the common bile duct: a case report and review of literature. Int Cancer Conf J. 2021;10:134–8.

    Article  Google Scholar 

  24. Kajioka H, Muraoka A. Rapid recurrence of spindle cell type undifferentiated carcinoma early after radical surgery in a bile duct cancer patient—a case report. Int J Surg Case Rep. 2021;81:105800.

    Article  Google Scholar 

  25. Strobel O, Hartwig W, Bergmann F, Hinz U, Hackert T, Grenacher L, et al. Anaplastic pancreatic cancer: presentation, surgical management, and outcome. Surgery. 2011;149:200–8.

    Article  Google Scholar 

  26. Akita M, Ajiki T, Ueno K, Tsugawa D, Tanaka M, Kido M, et al. Benefits and limitations of middle bile duct segmental resection for extrahepatic cholangiocarcinoma. Hepatobiliary Pancreat Dis Int. 2020;19:147–52.

    Article  Google Scholar 

  27. Jikei K, Ebata T, Mizuno T, Kyokane T, Matsubara H, Yokoyama S, et al. Oncologic reappraisal of bile duct resection for middle-third cholangiocarcinoma. Ann Surg Oncol. 2021;28:1990–9.

    Article  Google Scholar 

  28. Kwon HJ, Kim SG, Chun JM, Lee WK, Hwang YJ. Prognostic factors in patients with middle and distal bile duct cancers. World J Gastroenterol. 2014;20:6658–65.

    Article  Google Scholar 

  29. Köhler BC, Goeppert G, Waldburger N, Schlamp K, Sauer P, Jäger D, et al. An undifferentiated carcinoma at Klatskin-position with long-term complete remission after chemotherapy. Oncotarget. 2018;9:22230–5.

    Article  Google Scholar 

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All authors participated in surgery or postoperative management. All authors designed and drafted the manuscript. All authors read and approved the final manuscript.

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Correspondence to Masayuki Akita.

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Akita, M., Maeda, E., Ishida, R. et al. Aggressive behavior of anaplastic undifferentiated carcinoma arising from the hilar bile duct. surg case rep 8, 14 (2022). https://doi.org/10.1186/s40792-022-01368-y

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