Biological behavior of mucoepidermoid carcinoma of the esophagus

Clinico-pathological study of esophageal mucoepidermoid carcinoma: a 10-year survival from a single center

BACKGROUND

Mucoepidermoid Carcinoma of the Esophagus (MECE) is a relatively rare tumor type, with most of the current data derived from case reports or small sample studies. This retrospective study reports on the 10-year survival data and detailed clinicopathological characteristics of 48 patients with esophageal MEC.

METHODS

Data were collected from 48 patients who underwent curative surgery for esophageal MEC at the Fourth Hospital of Hebei Medical University between January 1, 2004, and December 31, 2020. These were compared with contemporaneous cases of Esophageal Squamous Cell Carcinoma (ESCC) and Esophageal Adenocarcinoma (EAC). Using the Kaplan-Meier method and multivariate Cox regression analysis, we investigated the clinicopathological factors affecting the survival of patients with MEC.

RESULTS

The incidence of MECE was predominantly higher in males, with a male-to-female ratio of approximately 7:1. The mid-thoracic segment emerged as the most common site of occurrence. A mere 6.3% of cases were correctly diagnosed preoperatively. The lymph node metastasis rate stood at 35.4%. The overall 1-year, 3-year, 5-year, and 10-year survival rates for all patients were 85.4%, 52.1%, 37.0%, and 31.0%, respectively. Post 1:1 propensity score matching, no significant statistical difference was observed in the Overall Survival (OS) between MEC patients and those with Esophageal Squamous Cell Carcinoma (ESCC) and Esophageal Adenocarcinoma (EAC) (P = 0.119, P = 0.669). Univariate analysis indicated that T staging and N staging were the primary factors influencing the prognosis of esophageal MEC.

CONCLUSIONS

MECE occurs more frequently in males than females, with the mid-thoracic segment being the most common site of occurrence. The rate of accurate preoperative endoscopic diagnosis is low. The characteristic of having a short lesion length yet exhibiting significant extramural invasion may be a crucial clinicopathological feature of MECE. The OS of patients with MEC does not appear to significantly differ from those with esophageal squamous carcinoma and adenocarcinoma.

Mucoepidermoid carcinoma of the esophagus with MAML2 gene rearrangement: Case report and literature review

Mucoepidermoid carcinoma (MEC) is the most common salivary gland malignancy but rarely occurs in the esophagus. It is easily confused with adenosquamous carcinoma and squamous cell carcinoma (SCC) with mucus-secreting components. MAML2 gene rearrangement detected by fluorescence in situ hybridization (FISH), RT-PCR or next-generation sequencing (NGS) can aid in the diagnosis. We present a case of esophageal MEC with MAML2 gene rearrangement detected by FISH. To the best of our knowledge, this is the first report of an esophageal MEC with MAML2 gene rearrangement. We also reveal that esophageal MEC patients were reported to have a higher risk of recurrence and death than SCC patients in previous literature. However, all the cases were diagnosed using previous diagnostic criteria and not confirmed by MAML2 gene rearrangement detection, and most of them might not be true MECs.

CEA-Regulated Oncolytic Virus Anticancer Therapy: A Promising Strategy for Rare Solid Tumors

BACKGROUND

Rare solid tumors have attracted much more attention due to the great unmet clinical need, limited treatment options, and poor prognosis. As the most thoroughly studied tumor marker, carcinoembryonic antigen (CEA) can not only overexpress in various common solid tumors, but also in several rare solid tumors. Oncolytic virus therapy has achieved excellent anticancer effects in the past decades. Due to the specific high expression of CEA in certain tumor tissues, but not in normal tissues, CEA has been applied to improve the tumor specificity of gene expression.

METHODS

The studies of CEA expression in rare solid tumors and CEA-regulated oncolytic virus therapy were reviewed.

RESULTS

We showed the types of rare solid tumors with overexpression of CEA. Elevated serum CEA levels can indicate the diagnosis, response of surgery or system therapy, distal metastasis, recurrence, and survival. Due to high tumor specificity, CEA-regulated OA therapy has demonstrated a surprising antitumor effect for common CEA-positive tumors in preclinical trials Conclusion: These data suggested that CEA could be a diagnostic and prognostic biomarker for several rare solid tumors. We proposed the hypothesis that CEA-regulated oncolytic virus therapy could be a promising therapeutic strategy for CEA-positive rare solid tumors.

Esophageal Mucoepidermoid Carcinoma: A Review of 58 Cases

BACKGROUND

Esophageal mucoepidermoid carcinoma (EMEC) is a rare disease. The biological behavior and treatment of this malignancy are not well established.

METHODS

Data from 58 patients with EMEC who underwent esophagectomy were retrospectively analyzed and compared with 5028 patients with esophageal squamous cell carcinoma (ESCC). Kaplan-Meier and multivariate Cox regression analyses were conducted to investigate the association between clinicopathological factors and survival.

RESULTS

The study cohort included 36 males and 22 females with a median age of 59 years (range, 40-78 years). Of the 47 patients who underwent preoperative esophagoscopic biopsy, only 1 patient was diagnosed with EMEC. EMEC was more often found in female patients (39.7% versus 25.8%, P=0.036) and patients with EMEC had a significantly lower rate of lymph node metastasis (25.0% versus 49.4%, P<0.001) than patients with ESCC. After 1:1 propensity score matching, the 5-year overall survival rate of 55.2% for patients with EMEC was similar to that of 61.9% for patients with ESCC (P=0.399).

CONCLUSIONS

EMEC is a rare disease that more often affects females and these patients has less lymph node metastasis than patients with ESCC. Preoperative esophagoscopic biopsy has difficulty obtaining an accurate pathological diagnosis for EMEC patients. The prognosis for EMEC is similar to that for ESCC.

Updates on World Health Organization classification and staging of esophageal tumors: implications for future clinical practice

The Fifth edition of the World Health Organization classification of digestive system and American Joint Committee on Cancer staging manual contain substantial refinements of information for esophageal tumors. The epithelial tumors of esophagus are classified as benign, dysplasia, and malignant groups. Dysplasia is divided into Barrett dysplasia and squamous dysplasia and graded into either low-grade or high-grade. Malignant esophageal tumors are often adenocarcinoma or squamous cell carcinoma. The main update in cancer staging in esophageal tumors is the subdivision of the prognostic staging into 3 groups; squamous cell carcinoma, adenocarcinoma, and carcinoma after adjuvant therapy. HER-2 amplification is recognized as a molecular target for therapy of esophagogastric adenocarcinoma. The other esophageal tumors are adenoid cystic carcinoma, mucoepidermoid/adenosquamous carcinoma, undifferentiated carcinoma and neuroendocrine neoplasms. Overall, the incorporation of new data and definitions on histopathology, prognostic factors, and genetics are important for personalized management of patients with esophageal tumors.

[Mucoepidermoid Carcinoma of the Esophagus]

Mucoepidermoid carcinoma is a malignant tumor that occurs mainly in the salivary glands of adults and children, but rarely in the esophagus. A surgical resection is the primary treatment for mucoepidermal carcinoma, and the prognosis has been reported to be poor. A 61-year-old man was diagnosed with an esophageal nodule in upper gastrointestinal endoscopy for the purpose of a medical examination without any special symptoms and an endoscopic resection was performed for an accurate diagnosis. An endoscopic mucosal resection was performed using a band ligation for a complete resection and continuous follow-up with no evidence of recurrence or metastasis. The unknown prognosis of endoscopic resection makes it necessary to follow the patient carefully.

Surgery combined with radio-chemotherapy for esophageal mucoepidermoid carcinoma: A case report

RATIONALE

Primary mucoepidermoid carcinoma (MEC) of the esophagus is a rare type of malignant neoplasm. Its morphology resembles that of MEC of the salivary glands. It is characterized by a diffuse mixture of squamous and mucus-secreting glandular carcinoma cells. Due to the low incidence of esophageal MEC, the biological behavior and treatment of this tumor have not been well studied.

PATIENT CONCERNS

In this case report, we describe a case of a 59-year-old man who presented with difficulty in swallowing. Iohexol swallowing revealed a malignant-appearing structure in the inferior-thoracic region.

DIAGNOSES

Biopsy of the lesion under endoscopy demonstrated a mucoepidermoid carcinoma of the esophagus.

INTERVENTIONS

We performed esophagectomy, esophagogastrostomy through the esophageal bed and 2-field lymphadenectomy. Histopathological analysis of the tumor revealed histological characteristics typical of an esophageal MEC. Radio-chemotherapy was administered to this patient.

OUTCOMES

Seventeen months after surgery, an esophageal computed tomography (CT) scan revealed that the wall of esophagus was evenly thickened. However, endoscopic assessment revealed no evidence of recurrence. Further CT scans at 19 and 31 months after surgery also showed a thickened esophageal wall, although endoscopic assessment at 31 months still revealed no esophageal stricture and no evidence of recurrence. The patient is alive with no dysphagia and no evidence of recurrence for over 39 months.

LESSONS

There is little evidence of effective treatment nor guidelines for treatment of esophageal MEC. Although the general prognosis of esophageal MEC is poor, comprehensive treatment of surgery and radio-chemotherapy appeared to be effective in this case. Radio-chemotherapy is a possible treatment option that was shown to have acceptable short-term effects.

Rare tumors of esophageal squamous mucosa

In spite of increasing incidence of esophageal adenocarcinoma in the last few decades, esophageal squamous cell carcinoma (SCC) still remains the dominant subtype of esophageal cancer worldwide. Apart from conventional SCC, some rare unconventional tumors of esophageal squamous mucosa are also well known. This study provides an introduction to these and presents a brief review of the literature, including the diagnostic and prognostic importance of each variant.

Primary esophageal sclerosing mucoepidermoid carcinoma with “tissue eosinophilia”

Mucoepidermoid carcinoma (MEC) is a rare primary esophageal malignancy. It is characterized by poor clinical recognition, pre-operative diagnostic challenges and a lack of standardized therapeutic guidelines. We report the clinicopathological features of a hitherto unreported variant of esophageal MEC, sclerosing MEC with “tissue eosinophilia”, in a mid-esophageal location in a 51-year-old female. The diagnosis of the initial biopsy was challenging, because of the small size, poor orientation and inadequate representation of the MEC components. Recognition of the resectability of the tumor prompted surgical resection and enabled a demonstration of the low grade foci containing intermediate cells, mucin pools and the hitherto undescribed presence of stromal sclerosis and tissue eosinophils in esophageal MEC. Heightened clinicopathological awareness of esophageal MEC facilitated a definitive diagnosis and patient management. Increased recognition and global documentation of esophageal sclerosing MEC with “tissue eosinophilia” is necessary to improve the understanding and diagnosis of this malignancy in this location and to improve management guidelines.

Primary mucoepidermoid carcinoma of the esophagus

INTRODUCTION

Primary mucoepidermoid carcinoma (MEC) of the esophagus is an uncommon neoplasm characterized by a diffuse mixture of squamous and mucus-secreting glandular carcinoma cells. Its biological behavior and response to therapies have not been well studied. Surgical resection is still the primary treatment, but the prognosis is poor. This retrospective study was designed to investigate the clinical characteristics, diagnosis, treatment, and prognosis of primary esophageal MEC.

METHODS

Clinical data were retrospectively analyzed from 36 patients with pathologically confirmed primary esophageal MEC who underwent transthoracic esophagectomy with lymphadenectomy between January 1991 and June 2010 at the Cancer Hospital of Shantou University Medical College. There were 27 men and 9 women ranging in age from 40 to 78 years (median, 58 years). Twenty-six of the 36 patients were treated with surgery alone. The other 10 were treated with surgery plus postoperative radiotherapy. The Kaplan-Meier and log-rank methods were used to estimate and compare survival rates. Cox's hazard regression model was used to identify prognostic factors, with entry factors of gender, age (≤60 years versus >60 years), length of the primary lesion (≤5 cm versus >5 cm), location of the primary lesion, macroscopic tumor type, tumor cell differentiation, pT, pN, pTNM stage, operation type (radical/palliative), and radiotherapy (yes/no).

RESULTS

The clinical symptoms, radiological and endoscopic features of primary esophageal MEC were similar to those of esophageal squamous cell carcinoma (ESCC). Of the 20 cases who underwent preoperative endoscopic biopsy, 18 cases were misdiagnosed as ESCC and 2 were misdiagnosed as esophageal adenosquamous carcinoma. The mean follow-up duration of this series was 38.8 months (range, 3-142 months). Twenty-two patients had died, 12 were still alive, and 2 were lost to follow-up. The median survival time of the 36 patients was 29.0 months (95% confidence interval = 20.0-38.0), and the 1-, 2-, 3-, and 5-year overall survival rates were 80.6%, 57.1%, 34.4%, and 25.8%, respectively. The 5-year survival rate of 25.8% was lower than 5-year absolute survival rate of 39.2% for ESCC patients who had undergone surgical resection during the same period at our center. For patients who underwent a radical operation, the 5-year survival rate of 32.0% for MEC patients was also lower than that of 41.7% (908/2175) for ESCC patients. In univariate analysis, pN (pN0/pN1-3) (p = 0.003) and operation type (radical/palliative) (p = 0.006) significantly influenced the median survival time of MEC patients. In multivariate analysis, pN (pN0/pN1-3) (p = 0.002) and operation type (radical/palliative) (p = 0.004) were independent prognostic factors.

CONCLUSIONS

Primary esophageal MEC is a rare disease and prone to be misdiagnosed. Lymph node metastasis and operation are independent prognostic factors. Surgical resection is the primary treatment, but the prognosis is poor.

Impact of simultaneous assay, the PCNA, cyclinD1, and DNA content with specimens before and after preoperative radiotherapy on prognosis of esophageal cancer-possible incorporation into clinical TNM staging system

AIM: The aim of the present study is to use immunohisto-chemical methods to investigate the clinical implications of tumor markers in esophageal squamous cell carcinoma and evaluate their impact on prognosis.

METHODS: From November 1990 to December 1996, 47 patients were treated with preoperative radiation followed by radical esophagectomy. All patients were confirmed pathologically as suffering from squamous cell carcinoma. Immunohistochemical stain was done for PCNA, cyclinD1 protein expression and DNA content analyzed by image cytometry. Kaplan-Meier method for single prognostic factor and log-rank test was used to test the significant difference. Cox stepwise regression model and prognosis index model were used for survival analysis with multiple prognostic factors.

RESULTS: Radio-pathological change, T stage and N stage, as the traditional prognostic factors had statistical difference in 3-, 5- and 10-year survival rates. While, tumor cell proliferating marked PCNA, cyclinD1 and DNA content served as independent prognostic factors of esophageal carcinoma. There was definitely an identity between the single and multiple factor analyses. PI was more accurate to evaluate the prognosis of esophageal carcinoma.

CONCLUSION: It is possible that tumor cell proliferating marked PCNA, cyclinD1 and DNA content would become the endpoints for evaluating the prognosis of esophageal carcinoma.