Sibi Krishna Thiyagarajan

Dr. Sibi Krishna Thiyagarajan

orcid

Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 October 2025 in Complications
Verified
Journal Article
Open access
PDF file
STSibi Krishna Thiyagarajan
Sibi Krishna Thiyagarajan
Alfredo VerasteguiAlfredo Verastegui
Alfredo Verastegui
JSJohn A Stauffer
John A Stauffer
JJJ J
J J
Background: Despite advances in surgical techniques and perioperative care, pancreatic resections such as pancreaticoduodenectomy (PD) and distal pancreatectomy (DP) remain high-risk procedures. Postoperative complications significantly impact morbidity, mortality, and patient quality of life. Methods: This narrative review summarizes recent literature on major complications following pancreatic surgery, including postoperative pancreatic fistula (POPF), delayed gastric emptying (DGE), and post-pancreatectomy hemorrhage (PPH), with an emphasis on incidence, risk factors, outcomes, and current preventive strategies. Results: POPF is a leading complication, occurring in 5–22% of cases and often linked with sepsis and hemorrhage. Key risk factors include high BMI, soft pancreatic texture, and small duct size. Preventive measures like Pasireotide, modified anastomosis techniques, and neoadjuvant therapy show variable success. DGE affects up to 57% of PD patients and is associated with prolonged recovery; antecolic reconstruction and erythromycin may reduce incidence. PPH, though less frequent (3–13%), can be life-threatening, particularly when secondary to POPF. Endovascular approaches are now favored for late arterial bleeding. Other complications include wound infections, abscesses, bile leaks, and pulmonary issues, all contributing to extended hospital stays and diminished quality of life. Conclusions: Pancreatic surgery continues to carry significant risks, with POPF, DGE, and PPH being the most impactful complications. While multiple interventions have shown promise, standardized protocols and predictive tools are still needed. Surgery should be performed in high-volume centers with experienced multidisciplinary teams to optimize outcomes.

8 October 2025 in The American Surgeon™
Verified
Journal Article
Closed access
STSibi Krishna Thiyagarajan
Sibi Krishna Thiyagarajan
SFShalyn Fullerton
Shalyn Fullerton
Alfredo VerasteguiAlfredo Verastegui
Alfredo Verastegui
KPKatherine Poruk
Katherine Poruk
JSJohn A. Stauffer
John A. Stauffer
Background: Whistal (Whipple + Distal) is a rare parenchyma-preserving technique for select patients with disease in both the pancreatic head and tail, sparing a disease-free middle segment. It may also be used after prior partial pancreatectomy. Surgical resection remains the cornerstone of treatment for pancreatic diseases such as PDAC, RCC metastasis, and multifocal IPMN. Whistal may balance oncologic control with pancreatic function preservation. Though infrequent, it is practiced and reported in literature. Methods: With IRB approval, a retrospective review of a prospective database (Aug 1999-Mar 2024) identified Whistal cases, categorized as staged Whistal (SW) or concomitant whistal (CW). Perioperative outcomes were assessed via Clavien-Dindo and ISGPS. A PubMed search identified reported middle segment pancreatectomy (Whistal) cases. Results: Of 2008 resections (Aug 1999-Mar 2024), 5 were Whistals (3 CW, 2 SW) for PDAC (n = 3), RCC (n = 1), IPMN (n = 1), and bile duct stricture (n = 1). Rates for major morbidity, POPF, and DGE were each 40%. Literature review found 26 papers reporting 52 additional Whistal cases. Conclusion: Whistal is safe for select patients, but wider adoption and long-term data are needed to confirm its efficacy.


4 May 2026 in Surgery
Verified
Journal Article
Closed access
Alfredo VerasteguiAlfredo Verastegui
Alfredo Verastegui
STSibi Krishna Thiyagarajan
Sibi Krishna Thiyagarajan
MRMichael S. Rutenberg
Michael S. Rutenberg
AJArielle Jacover
Arielle Jacover
MTMary Tice
Mary Tice
JSJohn A Stauffer
John A Stauffer

2 September 2026 in Updates in Surgery
Verified
Journal Article
Closed access
PDF file
Alfredo VerasteguiAlfredo Verastegui
Alfredo Verastegui
STSibi Krishna Thiyagarajan
Sibi Krishna Thiyagarajan
RLRachel J. Lew
Rachel J. Lew
MTMary Tice
Mary Tice
JSJohn A Stauffer
John A Stauffer
JJJ J
J J

5 December 2025 in Livers
Verified
Journal Article
Open access
PDF file
STSibi Krishna Thiyagarajan
Sibi Krishna Thiyagarajan
AJArielle Jacover
Arielle Jacover
Alfredo VerasteguiAlfredo Verastegui
Alfredo Verastegui
JJJ J
J J
JSJohn A Stauffer
John A Stauffer
Background: Surgical resection (SR) and liver transplantation (LT) are the main curative options for non-hepatocellular carcinoma (non-HCC) liver malignancies, including colorectal liver metastases (CRLMs), intrahepatic cholangiocarcinoma (iCCA), hilar cholangiocarcinoma (hCCA), and neuroendocrine tumor liver metastases (NETLMs). Resection aims for negative margins and adequate hepatic reserve, while LT offers treatment for unresectable disease but is limited by donor scarcity, immunosuppression, and ethical constraints. Methods: A targeted literature search (2005–2025) was conducted using PubMed and Google Scholar with predefined MeSH terms combining “liver resection,” “hepatectomy,” and “liver transplantation” across non-HCC malignancies. Relevant studies, reviews, and guidelines were included. Results: For CRLMs, SR remains standard with 5-year overall survival (OS) up to 58%, while LT offers 60–83% in highly selected unresectable cases. In iCCA, resection achieves median survival around 40 months, and LT yields OS up to 69% in very early or neoadjuvant-controlled disease. For hCCA, the Mayo protocol combining neoadjuvant therapy with LT provides 5-year OS of 65–80%. In NETLMs, LT achieves 63–97% OS under strict criteria. Conclusions: SR remains first-line for resectable non-HCC malignancies, while LT provides superior outcomes in unresectable yet biologically favorable disease, emphasizing careful selection and organ allocation.