Pancreatic Pseudocyst Internal Drainage
4852048540wRVU: 21.39 — Pancreatic cystjejunostomy (Roux-en-Y)48510wRVU: 16.76 — External drainage of pancreatic cyst43240wRVU: 6.97 — EUS-guided cystgastrostomy (endoscopic)
Pancreatic pseudocyst, [X] cm, [body / tail / head region], mature [≥4–6 weeks from onset], symptomatic [pain / gastric outlet obstruction / early satiety / inability to tolerate oral intake], not amenable to or failed endoscopic drainage
Same
Open [cystgastrostomy / Roux-en-Y cystjejunostomy] for internal drainage of pancreatic pseudocyst
[Attending name], MD/DO
[Resident/PA name]
General endotracheal
The patient is a [age]-year-old [male/female] with a [X]-cm pancreatic pseudocyst involving the [body / tail / head] of the pancreas, arising from [acute pancreatitis / chronic pancreatitis / pancreatic trauma] [X] weeks prior. The pseudocyst has been symptomatic with [pain / early satiety / gastric outlet obstruction / failure to thrive]. [Endoscopic ultrasound-guided drainage was [attempted but failed / not feasible due to (no adherent gastric/duodenal wall / intervening vessels)].] Surgical internal drainage was indicated given the maturity, size, and symptoms of the pseudocyst. The risks, benefits, and alternatives were discussed and informed consent was obtained.
A [X]-cm pseudocyst was identified in the [retrogastric / peripancreatic] space, [densely adherent to the posterior stomach wall / adjacent to but not adherent to the stomach / in proximity to the proximal jejunum]. The cyst wall was [thick and mature / fibrous / well-formed]. The cyst contents were [clear amber fluid / turbid fluid / old hemorrhagic fluid]. [No solid necrotic debris was encountered.] The cyst communicated with the [main pancreatic duct on intraoperative pancreatogram / no ductal communication on imaging]. [The adjacent stomach or jejunum was selected as the drainage site based on [proximity / anatomic adherence].]
The patient was positioned supine. General anesthesia was induced. A surgical timeout was performed. The abdomen was prepped and draped. A midline laparotomy was performed. The abdomen was explored; no ascites, no peritoneal metastases.
[CYSTGASTROSTOMY:]
The anterior stomach wall was opened via [a vertical 6–8 cm gastrotomy in the anterior body]. The posterior stomach wall was inspected and the pseudocyst was confirmed to be adherent to the posterior wall and palpable through it. A needle aspiration of the posterior wall confirmed return of [X] mL of [amber / turbid] cyst fluid. The posterior stomach wall was incised over the pseudocyst with electrocautery, creating a [4–6 cm] dependent cystgastrostomy opening. The cyst contents were suctioned and irrigated. The cyst cavity was explored with a finger and a headlight to exclude necrotic debris. [Biopsy of the cyst wall was taken and sent to pathology to exclude cystic neoplasm.] The anastomosis was secured with [running 3-0 Vicryl sutures incorporating both the posterior stomach wall and the pseudocyst wall], creating a dependent internal drainage stoma. The anterior gastrotomy was closed in two layers.
[ROUX-EN-Y CYSTJEJUNOSTOMY:]
The pseudocyst was identified in the lesser sac. The cyst wall was punctured with a needle and [X] mL of fluid was aspirated and sent for amylase and cytology. A Roux-en-Y limb of jejunum [45–60 cm] was constructed by dividing the jejunum [15–20 cm] from the ligament of Treitz. The Roux limb was brought up in a retrocolic fashion to lie adjacent to the pseudocyst. A [6 cm] side-to-side anastomosis was created between the dependent portion of the cyst and the antimesenteric border of the Roux limb using [running 3-0 Vicryl inner layer and interrupted 3-0 silk Lembert outer layer / GIA stapler with suture reinforcement]. The cyst cavity was irrigated and the anastomosis patency confirmed. The jejunojejunostomy was created [45–60 cm] from the cystjejunostomy with a [GIA stapler / hand-sewn anastomosis].
Hemostasis was confirmed. A closed-suction drain was placed adjacent to the anastomosis. The abdomen was irrigated. The fascia was closed with [#1 PDS]. Skin was closed with staples.
None
Cyst fluid sent for amylase, cytology, and culture. [Cyst wall biopsy sent to pathology to exclude neoplasm.]
[X] mL
[Jackson-Pratt drain adjacent to anastomosis]
The patient was taken to the PACU in stable condition. NPO initially; diet advanced per clinical status. Drain amylase sent on POD1 and POD3.
Epic SmartPhrase Version
PREOPERATIVE DIAGNOSIS: Pancreatic pseudocyst *** cm, *** region, *** weeks, symptomatic
POSTOPERATIVE DIAGNOSIS: Same
PROCEDURE PERFORMED: Open [cystgastrostomy / Roux-en-Y cystjejunostomy]
ATTENDING: ***, MD/DO
ASSISTANT: ***
ANESTHESIA: General
INDICATIONS: .PTAGE-year-old .PTSEX with *** cm pancreatic pseudocyst from [acute/chronic pancreatitis / trauma], *** weeks old. Symptomatic: ***. [Endoscopic drainage not feasible: ***.] Consent obtained.
FINDINGS: *** cm pseudocyst, retrogastric/***. Wall mature/fibrous. Contents: ***. [No necrotic debris.] Adherent to [posterior stomach / adjacent to jejunum].
PROCEDURE:
Supine. Midline laparotomy. [CYSTGASTROSTOMY: Anterior gastrotomy. Posterior wall palpated over cyst. Needle aspiration confirmed cyst fluid. Posterior gastrotomy *** cm. Cyst contents suctioned/irrigated. Cyst wall biopsied/not biopsied. Cystgastrostomy anastomosis with running 3-0 Vicryl. Anterior gastrotomy closed 2 layers.] [ROUX-EN-Y: Cyst aspirated; fluid to amylase/cytology. Roux limb *** cm, retrocolic. Side-to-side cystjejunostomy *** cm. Jejunojejunostomy *** cm distal.] JP drain placed. Fascia #1 PDS. Staples.
EBL: *** mL
SPECIMENS: Cyst fluid to amylase/cytology/culture; [cyst wall to pathology]
COMPLICATIONS: None
DISPOSITION: PACU stable. NPO initially. Drain amylase POD1/3.
Signed: .ME, .MYDEGREE
.TODAYVariants
Laparoscopic Cystgastrostomy
A laparoscopic approach was used. Four trocars were placed. The lesser omentum was divided to access the lesser sac [or the lesser sac was entered through the gastrocolic ligament]. The posterior stomach wall adherent to the pseudocyst was identified. An intragastric approach or transgastric approach was used: [intragastric — two trocars placed directly through the anterior stomach wall; posterior gastrotomy created with endoscopic GIA stapler or ultrasonic shears; cyst aspirated and fenestrated; anastomosis reinforced with absorbable suture]. Bill 48520 for laparoscopic cystgastrostomy — same code as open.
Open Necrosectomy for Walled-Off Necrosis
At operation, the cyst cavity contained significant solid necrotic debris in addition to fluid, consistent with walled-off necrosis (WON) rather than simple pseudocyst. After entering the cavity via cystgastrostomy or Roux-en-Y approach, digital and instrument debridement of necrotic material was performed. All loose necrotic pancreatic tissue was removed; no debridement was performed at areas of firm attachment to viable tissue (hemorrhage risk). The cavity was irrigated with [2–3 L] warm saline. Drains were placed for postoperative lavage if needed. Bill 48105 (resection/debridement of peripancreatic tissue) rather than 48520/48540 for WON requiring open necrosectomy.
Charting Tips
- Document cyst maturity. Surgical internal drainage requires a mature pseudocyst with a fibrous wall capable of holding sutures — generally ≥4–6 weeks from the index pancreatitis event. An immature pseudocyst wall will not hold anastomotic sutures. Document the time from onset of pancreatitis to operation and describe the wall as 'mature/fibrous/well-formed' in the findings.
- Send cyst wall biopsy to exclude cystic neoplasm. Mucinous cystic neoplasm (MCN) and intraductal papillary mucinous neoplasm (IPMN) can mimic pseudocysts clinically and radiographically. Always send cyst wall or aspirate for cytology and cyst fluid CEA/amylase analysis. Document that a wall biopsy was taken and sent. Draining an MCN internally rather than resecting it is an oncologic error.
- Document cyst fluid amylase and cytology. Pseudocyst fluid has markedly elevated amylase (often >10,000 U/L) and negative cytology. A low-amylase cyst with positive cytology should prompt frozen section and possible conversion to resection. Document the intraoperative fluid aspiration and what was sent.
- Document dependent drainage. The cystgastrostomy or cystjejunostomy anastomosis must be at the most dependent portion of the cyst to ensure gravity drainage. Document that the anastomosis was placed at the most dependent aspect of the cavity. Non-dependent drainage leads to inadequate emptying and recurrence.
Billing Tips
- Open internal cystgastrostomy: 48520 (17.70 wRVU, 90-day global). Use when the pseudocyst is surgically drained into the posterior stomach wall. This is the most common open internal drainage approach for retrogastric pseudocysts adherent to the posterior stomach.
- Open Roux-en-Y cystjejunostomy: 48540 (21.39 wRVU, 90-day global). Use when the pseudocyst is drained into a Roux limb of jejunum. Higher wRVU reflects the additional intestinal reconstruction. Preferred when the cyst is not adherent to the posterior stomach or when cystgastrostomy is technically not feasible.
- External drainage: 48510 (16.76 wRVU, 90-day global). Use for external surgical drainage — open or laparoscopic marsupializationwith drain placement. This is rarely performed as a primary treatment today; most external drainage is done percutaneously by interventional radiology. Bill 48510 for surgical external drainage only.
- Endoscopic ultrasound-guided cystgastrostomy: 43240 (endoscopic, physician procedure). This is the current first-line approach for most pseudocysts and walled-off necrosis adherent to the stomach or duodenum. It does not use 48520. Document whether the endoscopic approach was attempted and failed before surgical drainage.
- For walled-off necrosis (WON) requiring open necrosectomy, use 48105 (resection or debridement of peripancreatic tissue, 48.03 wRVU, 90-day global). WON with necrotic debris is a different indication and procedure from pseudocyst drainage — document whether the cavity contents were liquid (pseudocyst) or solid/necrotic (WON).