Evaluating Postoperative Outcomes of Mohs Surgery in the Elderly: A Retrospective Review of Large Repairs

May 2025 | Volume 24 | Issue 5 | 8489 | Copyright © May 2025


Published online April 9, 2025

doi:10.36849/JDD.8489

Vy X. Pham BA, Somaira Nowsheen MD PhD, Shaundra Eichstadt MD, Shang I. Brian Jiang MD

University of California, San Diego, Department of Dermatology, San Diego, CA

Abstract
Background: As the geriatric population, defined by the National Institute on Aging as 65 years and older, continues to grow exponentially, understanding how age impacts the treatment of cutaneous malignancies has long been a mainstay in the practice of dermatology. Despite the known immunologic and morphologic deterioration of the skin barrier with time, few studies have assessed the role of advanced age in the outcomes of patients undergoing Mohs micrographic surgery and the associated extensive reconstruction of their cutaneous defect.
Objective: To compare the complication rates of large flaps ≥30 cm2 and complex linear closures (CLC) ≥12.5 cm, between younger (18-64) and older (65+) age groups.
Materials and Methods: A retrospective chart review was conducted on a cohort of patients presenting at our institution’s Mohs Micrographic Surgery Center for tumor removal from January 1, 2010, to December 31, 2022, and whose defects were repaired with large CLCs or flaps. Demographic data and outcomes were collected and analyzed.
Results: For all assessed complications, including infection, hematoma formation, bleeding, dehiscence, and necrosis, we found similarly low and no significant differences in the postoperative rates when comparing younger (18-64 years) and older (≥65 years) age groups.
Conclusion: Our data suggests that large CLC and flaps can be safely performed in elderly patients without a significant increase in complication rates.

J Drugs Dermatol. 2025;24(5) doi:10.36849/JDD.8489

INTRODUCTION

As individuals age, morphological and immunological changes affect the skin's function as a protective barrier. These changes not only influence the skin's appearance but also its capacity to heal after injury, including surgical incisions.1

While Mohs Micrographic Surgery provides high cure rates, excising tumors can lead to complex defects necessitating extensive cutaneous repairs, such as linear closures and flaps. With the increasing number of skin cancer patients, particularly those over 65 undergoing Mohs surgery, assessing the outcomes of these large repairs is crucial.2-3

We conducted a retrospective chart review of adult patients presenting at the UCSD Dermatologic and Mohs Micrographic Surgery Center between January 1, 2010, and December 31, 2022. Of these patients, those who underwent dermatologic surgery with linear closures (LCs) greater than or equal to 12.5 cm or flaps greater than or equal to 30 cm2 were included in this study (n=347).

Demographic data, such as age at the time of surgery, was recorded and all cases were categorized into two age groups: 18 to 64 and 65+ years old. Complications and other characteristic data were documented in Table 1. We utilized Tukey’s multiple comparisons test through GraphPad Prism software to compare the mean differences in complication rates among age groups. Statistically significant differences were defined by an adjusted P-value of less than or equal to 0.05.

There was no significant difference in hematoma rates when comparing patients aged 18-64 and 65+ years old for both flaps (P=0.98, 4.7% vs 5.5%) and LC repairs (P=0.98, 5% vs 0%). The same was true when evaluating bleeding complication rates for flaps (P=0.98, 1.9% vs 2.5%) and LC repairs (P=0.98, 10% vs 0%). For LC cases, anticoagulation rates did not significantly vary (P=0.59, 30% vs 42.1%). However, anticoagulation rates were higher in patients aged 65+ who underwent flap repairs (P=0.0005, 25.2% vs 52.2%; Table 1).