Abdominal Circumference as a Predictor of Operative Time in Retroperitoneal Adrenalectomy for Pheochromocytoma

January 5, 2026 updated by: Byung-Chang Kim, Asan Medical Center

Abdominal Circumference as a Novel Predictor of Operative Time in Retroperitoneal Adrenalectomy for Pheochromocytoma: A Retrospective Observational Study

This retrospective observational study examines whether abdominal circumference is associated with operative time in patients undergoing retroperitoneal adrenalectomy for pheochromocytoma. Data were collected from medical records of patients treated at a single tertiary referral center. The primary outcome is operative time, measured in minutes. The purpose of this study is to evaluate whether abdominal circumference can serve as a practical predictor of operative difficulty in retroperitoneal adrenalectomy.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

159

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population consists of adult patients diagnosed with pheochromocytoma who underwent retroperitoneal adrenalectomy at a single tertiary referral center. Data were collected retrospectively from electronic medical records.

Description

Inclusion Criteria:

  • Adult patients diagnosed with pheochromocytoma
  • Patients who underwent retroperitoneal adrenalectomy
  • Availability of complete operative records

Exclusion Criteria:

  • Patients younger than 18 years
  • Patients who underwent transperitoneal adrenalectomy
  • Incomplete clinical or operative data

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Pheochromocytoma Patients
Patients diagnosed with pheochromocytoma who underwent retroperitoneal adrenalectomy at a single tertiary referral center. All procedures were performed as part of routine clinical care, and no experimental intervention was assigned for the purpose of this observational study.
Procedure: Retroperitoneal Adrenalectomy
Retroperitoneal adrenalectomy performed as part of routine clinical care for patients with pheochromocytoma. No experimental intervention was assigned, and the surgical procedure was not altered for the purpose of this observational retrospective study.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Operative Time
Time Frame: During surgery
Operative time measured in minutes from skin incision to skin closure, obtained from operative records.
During surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Asan Medical Center

Investigators

  • Principal Investigator: BYUNG-CHANG KIM, MD, PhD, Asan Medical Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2017

Primary Completion (Actual)

December 1, 2021

Study Completion (Actual)

December 1, 2021

Study Registration Dates

First Submitted

January 5, 2026

First Submitted That Met QC Criteria

January 5, 2026

First Posted (Actual)

January 14, 2026

Study Record Updates

Last Update Posted (Actual)

January 14, 2026

Last Update Submitted That Met QC Criteria

January 5, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AC-PHEO-RPA

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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