Effect of main pancreatic duct suture ligation on the prevention of clinically relevant pancreatic fistula after distal pancreatectomy: analysis of 82 consecutive patients

OBJECTIVE

This study aimed to examine the factors linked to the development of clinically significant pancreatic fistulas following distal pancreatectomy (DP) and to assess the efficacy of suture ligation of the main pancreatic duct.

PATIENTS AND METHODS

A single-center retrospective study was performed on the medical records of 82 patients who underwent DP in our institution between January 2011 and December 2019.

RESULTS

There were 28 males (34.1%) and 54 females (65.9%). The patients' age ranged from 18 to 86 years (median: 55.5 years). Indications for DP included primary pancreatic disease (n=63, 76.8%) and non-pancreatic disease (n=19, 23.2%). Postoperative mortality and morbidity rates were 3.7% and 48%, respectively. Pancreatic parenchymal closure was accomplished by a hand-sewn technique or mechanical stapling in 89 and 13 patients, respectively. Identification of the pancreatic duct and suture ligation was performed in 46 patients (56.1%). Pancreatic fistula was developed in 20 patients (24.4%); 12 fistulas were classified as Grade B, and 8 as Grade C. Biochemical leaks (Grade A) were identified in 8 patients (9.8%). Multivariate analysis indicated that failure to ligate the main pancreatic duct was the only variable associated with an increased risk for pancreatic leak (p=0.031; odds ratio=0.233; 95% confidence interval, 0.062-0.879).

CONCLUSIONS

Pancreatic leak remains a common complication after DP. The incidence of leaks is reduced significantly when the main pancreatic duct is identified and directly ligated during DP.

Multimodal Treatment of Chylous Fistula: A Retrospective Case-Control Study

Chylous fistulas (CF) are rare surgical complications and there is no standard treatment. This study presents the treatment modalities performed on patients who developed CF over a 10-year period. During the observation period, CF developed in 29 patients, 16 of whom were women. The mean age was 55.76± 13.48. Lymphatic duct injury was mostly seen in the abdomen (58.6%) and the most common reason was nephrectomy (20.7%). Extended lymphatic dissection due to malignancy was performed in 82.7% of all cases. Chylous leakage started postoperatively on 3.78±3.94 days (range: 1-19 days). Fasting, total parenteral nutrition (TPN), and somatostatin treatment were applied to all patients, and 75.8% of the fistulas were resolved completely with medical treatment. Surgical ligation of the lymphatic canal was performed in 7 patients. One was not successful and underwent percutaneous embolization of the thoracic lymphatic leakage cavity. All fistulas were resolved in 18.18±10.4 days. The resolution time and hospital stay were significantly higher in thoracic fistulas (p=0.017; p=0.003, respectively). In addition, malignant cases had longer resolution time (32.40±28.72 vs 16.27±11.25, p=0.036) and hospital stay (35.0±29.74 vs 16.25±14.05p= 0.002 respectively) than non-malignant. There was no chylothorax, chylous ascites, or recurrence at 20.55±22.88 months follow-up. Treatment of CF with fasting, TPN, and somatostatin analogs are effective. Other interventions such as surgical ligation with or without fibrin glue and interventional radiology treatments may be considered when conservative treatments fail.

Intervention for Hepatic and Pulmonary Metastases in Breast Cancer Patients: Prospective, Multi-institutional Registry Study-IMET, Protocol MF 14-02

BACKGROUND

One fourth of early-stage breast cancer cases become metastatic during the follow-up period. Limited metastasis is a metastatic disease condition in which the number of metastatic sites and the extent of the disease both are limited, and the disease is amenable to metastatic intervention. This prospective study aimed to evaluate intervention for limited metastases in the lung, liver, or both.

METHODS

The study enrolled luminal A/B and/or human epidermal growth factor receptor 2 (HER2)-neu+ patients with operable lung and/or liver metastases in the follow-up assessment after completion of primary breast cancer treatment and patients with a diagnosis of metastasis after 2014. Demographic, clinical, tumor-specific, and metastasis detection-free interval (MDFI) data were collected. Bone metastasis in addition to lung and liver metastases also was included in the analysis. The patients were divided into two groups according to the method of treatment for metastases: systemic therapy alone (ST) group or intervention (IT) group.

RESULTS

Until June 2020, 200 patients were enrolled in the study. The demographic data were similar between the two groups. The median follow-up time was 77 months (range 55-107 months) in the IT group (n = 119; 59.5%) and 57 months (range 39-84) in the ST-only group (n = 81; 40.5%). The median MDFI was 40 months (range 23-70 months) in the IT group, and 35 months (range 13-61 months) in the ST-only group (p = 0.47). The groups had similar surgeries for the primary tumor and axilla. Most of the patients had liver metastases (49.5%, n = 99), and 42% (n = 84) of the patients had lung metastases. Both lung and liver metastases were found in 8.5% (n = 17) of the patients. The primary tumor was estrogen receptor/progesterone receptor-positive in 75% (n = 150) of the patients, and 32% (n = 64) of the patients had HER2-neu+ tumors. Metastatic-site resection was performed for 32% (n = 64) of the patients, and 27.5% (n = 55) of the patients underwent metastatic ablative interventions. In the Kaplan-Meier survival analysis, the hazard of death (HoD) was 56% lower in the IT group than in the ST-only group (hazard ratio [HR], 0.44; 95% confidence interval [CI] 0.26-0.72; p = 0.001). The HoD was lower in the IT group than in the ST-only group for the patients younger than 55 years (HR, 0.32; 95% CI 0.17-0.62; p = 0.0007). In the multivariable Cox regression model, HoD was significantly lower for the patients who underwent intervention for metastases and had an MDFI longer than 24 months, but their liver metastases doubled the risk of death compared with lung metastases.

CONCLUSION

Metastasis-directed interventions have reduced the risk of death for patients with limited lung/liver metastases who are amenable to interventions after completion of primary cancer treatment. For a select group of patients, such as those with luminal A/B or HER2-neu+ breast cancer who are younger than 55 years with limited metastases to the lung and liver or an MDFI longer than 24 months, surgical or ablative therapy for metastases should be considered and discussed on tumor boards.

Primary gastric melanoma presenting with recurrent upper gastrointestinal bleeding

Malignant melanoma of the gastrointestinal tract is usually a metastasis from a cutaneous source. Primary gastric melanoma is an extremely rare clinical entity, with few reported cases worldwide. It is often advanced at the time of diagnosis and is associated with a poor outcome. We report a case of a 57-year-old male who presented to the emergency department with complaints of fatigue, haematemesis and melena. Laboratory investigation indicated a haemoglobin level of 7.4g/dl, for which the patient received a transfusion. Upper gastrointestinal endoscopy revealed a bleeding mass in the body of stomach which provisional histology was suggestive of a malignant mesenchyimal tumour but subsequent cytomorphology and immunophenotyping were consistent with malignant melanoma, with positive S-100, HMB-45 and Melan-A. Dermatological exam indicated two lesions suspicious for the primary site of metastasis but were ultimately diagnosed as benign lesions, one junctional nevus and other one seborrheic keratosis, on biopsies. Ophthalmologic exam showed no other probable sites of origin. PET/CT showed accumulation of tracer in the stomach, jejunum and perigastric lymph nodes. For this reason, primary advanced gastric melanoma was suspected in this patient. Since the patient had recurrent upper gastrointestinal bleeding that required frequent blood transfusion, a total gastrectomy with partial small bowel resection was performed. We report this case to present initial diagnostic challange and discuss performing surgery for recurrent tumour bleeding.

Effect of Dosage and Type of Hepatitis B Immunoglobulin on Hepatitis Antibody Levels in Liver Transplant Recipients

BACKGROUND

The current study aimed to evaluate the effect of dosage and type (intramuscular [IM] vs intravenous [IV]) of hepatitis B immunoglobulin (HBIG) on hepatitis antibody level in liver transplant recipients.

METHODS

Between September 2000 and August 2016, patients who underwent orthotropic liver transplantation for chronic liver failure or hepatocellular carcinoma secondary to chronic hepatitis B virus (HBV) were retrospectively reviewed from a prospectively maintained database. The analyses of risk factors for postoperative short- and long-term anti-hepatitis B surface antibody levels (as classified level I: 0 to 100 U; II: 100 to 500 U; III: 500 to 1000 U; IV: >1000 U) were performed based on demographic characteristics, hepatitis B envelope antigen, hepatitis B core antibody, HBV DNA, delta antigen, HBIG administration dosage during unhepatic phase (5000 or 10,000 I/U; IM or IV), and type of administration in post-transplant period. Patients who were followed for less than 12 months were excluded from long-term analysis.

RESULTS

The mean follow-up of 58 orthotropic liver transplant patients was 72 (±45) months. No adverse events were observed during both IM and IV type of administration. Compared with IM type, IV administration was associated with a significantly higher HBV antibody level in the short term (for IM and IV: level I: 24% vs 6%; II: 49% vs 18%; III: 12% vs 35%; IV: 15% vs 41%, respectively, P = .007). In the long term, IV administration of hepatitis B immunoglobulin (HBIG) was reported as the sole factor causing higher antibody level (P = .002). Longer follow-up was associated with decreased levels of anti-hepatitis B surface antibody.

CONCLUSION

IV HBIG administration in preoperative anhepatic phase and postoperative prophylaxis is associated with higher antibody level both the short and long term without any adverse event.