The spilled stone. A potential danger after laparoscopic cholecystectomy

Intra-abdominal abscess from dropped gallstone: A case report

Dropped gallstones are a common complication during a laparoscopic cholecystectomy. The formation of an abdominal abscess related to the dropped gallstones is rare because the majority of these calculi do not cause complications. Ultrasound is a usually used first-line imaging modality to detect gallstones in the abscess. CT scan may be used to confirm the diagnosis of abscess and for topographic analysis. We report the case of a lady presented to the emergency department 2 months after laparoscopic cholecystectomy; for acute cholecystitis; with acute abdomen and fever. Laboratory values revealed an elevated white blood cell count (WBC) and C-reactive protein concentration (CRP). The diagnosis of intra-abdominal abscess was evoked by ultrasound and contrast-enhanced CT, and confirmed by laparoscopy. The purpose of this paper is to illustrate the importance of searching and recognizing dropped gallstone within collection, particularly in the context of previous laparoscopic cholecystectomy.

Fate of lost gallstones during laparoscopic cholecystectomy

Backgrounds/Aims

The fate of gallstones that remain in the peritoneal cavity due to perforation of the gallbladder during laparoscopic cholecystectomy (LC) has been studied vigilantly since the early 1990s when this surgical procedure started to be used. But the complication statistics vary with each report. So we reviewed our 47 cases of lost stones that were traceable from 1998 to 2007.

Methods

Stones entered the peritoneal cavity through the perforation site during dissection of the body or Hartmann's pouch of gallbladder from the liver bed, despite trials of stone removal like irrigation and using a glove finger pouch especially in the case of numerous small stones. There were nine cases of lost stones that were caused by fragments of stone breaking from a large stone during its retrieval.

Results

No patient was forced into revision surgery or intervention for the missing stones but only negative suction drains were inserted, and information to the patients was given. Most of the stones (N=42, 89.4%) remained silent during the follow-up period of 10.4±3.6 years, and 5 patients (10.6%) developed inflammatory complications in the peritoneal cavity and abdominal wall. Two intraperitoneal abscesses were found in the right subhepatic area and a cul-de-sac and these were managed by laparotomy. Subhepatic abscess was later associated with intestinal obstruction. Two patients suffered an umbilical portal site fistula and a right flank portal fistula respectively, requiring prolonged wound care. One patient suffered immediate postoperative peritonitis that was cured by antibiotics.

Conclusions

Lost stones should be retrieved or fragmented as much as possible for removal through a drain, and caution should be exercised during dissection of the gallbladder to avoid perforating the gallbladder. Considering the approximately 10% incidence of serious inflammatory complications of lost stones, the complications should be explained to patients to allow for earlier diagnosis of complications later.

Consequences of spilt gallstones during laparoscopic cholecystectomy

To document the incidence of spilt gallstones during laparoscopic cholecystectomy, the cause and consequences of such spillage. The study included 150 consecutive laparoscopic cholecystectomies performed between October 2007 and November 2008. Data was collected in a prospective manner in accordance to proforma. Follow up were performed at the end of 1 week, 1 month, 6 months and 1 year. The spillage of gall stones during surgery occurred in 19.04 % of the cases. Majority of the spillage occurred due to perforation of the gall bladder during dissection, followed by application of toothed grasper. Although all visible spilt stones were retrieved during surgery, complication rate of 0.66 % was observed. The incidence and complications secondary to the spillage of gall stones during standard laparoscopic cholecystectomy is low but avoidable. Various complications can occur, over a large period of time. Thus it is advisable to retrieve as many gallstones as possible short of converting to a laparotomy Dasari and Loan (JSLS 13(1):73-76, 2009), Daradkeh and Suwan (World J Surg 22:75-77, 1998).

Venocutaneous fistula

This is the first description of venocutaneous fistula, a late complication of elective laparoscopic cholecystectomy that arose 18 months after the initial operation. Postoperatively, the patient twice developed an abscess in the abdominal wall at the former site of the umbilical trocar. The first abscess occurred on the 6th postoperative day; the second, after 14 months. After an additional 4 months, a fistula opening appeared just below the umbilicus. Fistulography revealed a connection with the venous system of the omentum majus. During subsequent resection of the fistula, a pigment gallstone was retrieved from the base of the fistula.

Sonographic features of intra-abdominal abscess caused by spilled stones during laparoscopic cholecystectomy

Spillage of stones into the abdominal cavity resulting from perforation of the gallbladder is one of the common complications of laparoscopic cholecystectomy. Although many surgeons know that stones left in the abdominal cavity can cause late visceral abscess requiring surgical treatment, the sonographic features of such abscesses have not yet to be thoroughly investigated. We investigated the sonographic features of intra-abdominal abscesses caused by spilled stones after laparoscopic cholecystectomy using Hitachi Model EUB-525 (3.5 MHz) and Aloka Model SSD-5500 (3.75 MHz) ultrasound systems. Two thousand thirty-six laparoscopic cholecystectomy procedures were carried out at this institution from 1990 through 2001. During this period, we encountered seven cases of intra-abdominal abscess. Three of these cases were symptomatic, but abscess, granulation, or both, were found incidentally by ultrasonography in the other four patients during routine annual health examinations. Laparotomy and open drainage of pus and gallstones from the intra-abdominal abscess were necessary in five cases. Ultrasonography revealed a mass in six of the seven patients. The abscesses were located in either the right subphrenic or subhepatic space on the surface of the liver and were sometimes difficult to distinguish from liver tumors. Ultrasound showed the abscesses as oval, low-echoic, solid masses with posterior enhancement. They ranged from 20 to 58 mm in diameter, had clear margins and highly echoic peripheral rims, and showed lateral shadowing. The lesions also contained several highly echoic spots with acoustic shadows that were thought to be the spilled stones. We conclude that visceral abscess should be considered after laparoscopic cholecystectomy, and that careful observation using ultrasonography is required, especially when the gallbladder is perforated and bile and stones have spilled out.

Retained gall-stone as a differential diagnosis of acute appendicitis

A52-year-old female suffering repeated attacks of cholecystitis underwent an otherwise straightforward laparoscopic cholecystectomy. At completion the gall bladder was seen through the laparoscope to rupture during its removal via the umbilical incision. A single stone was noted to fall from the gall bladder into the peritoneal cavity and this was easily retrieved. No other spilled stones were seen at completion laparoscopy. The immediate postoperative recovery was uneventful and the patient was allowed home on the following day.

Eight weeks later the patient presented as an emergency with central abdominal pain which radiated to the right iliac fossa. There was associated nausea and vomiting and a tachycardia but no fever or bowel upset. Clinical findings included tenderness and guarding in the right iliac fossa but normal bowel sounds and rectal examination. Chest and abdominal radiographs were normal, as were blood count, glucose, amylase, renal and liver function tests. A clinical diagnosis of acute appendicitis was suspected and the right iliac fossa was explored through a muscle-splitting incision. A normal appendix was found and was removed but there were fibrinous adhesions and inflammation around a gallstone surrounded by the mesentery of the terminal ileum. The adhesions were divided and the gallstone removed, followed by peritoneal lavage. The patient again made an uneventful recovery and was allowed home, free of symptoms, 72 hours later.