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MDCT imaging in Spigelian hernia, clinical, and surgical implications.

Abstract：

OBJECTIVE:Spigelian hernia is an uncommon congenital or acquired defect in the transversus abdominis aponeurosis with non-specific symptoms posing a diagnostic challenge. There is a paucity of radiology literature on imaging findings of Spigelian hernia. The objective of this study is to explore the role of MDCT in evaluating Spigelian hernia along with clinical and surgical implications. MATERIALS AND METHODS:In this IRB approved, HIPAA compliant retrospective observational analysis MDCT imaging findings of 43 Spigelian hernias were evaluated by two fellowship-trained radiologists. Imaging features evaluated were: presence of Spigelian hernia, laterality, relation to "hernia belt" (between 0 and 6 cm cranial to an imaginary axial line between both anterior superior iliac spines), the hernia neck and sac sizes, hernia content, and other coexistent hernias (umbilical, incisional, inguinal). Patient's demographics (age, gender, BMI, conditions with increased intra-abdominal pressure) were also recorded for any correlation. RESULTS:60% (26/43) of Spigelian hernias were located below the hernia belt while 33% (14/43) within the hernia belt and 7% (3/43) above the hernia belt. The most common subtype of Spigelian hernia encountered was interparietal (84%). The mean hernia neck diameter was 3.4 cm, mean hernia sac volume was 329 cc. Hernia content included: fat (43/43) bowel (23/43), fluid (3/43). 3 patients had no clinical history provided, the remaining 37 patients' clinical presentation was asymptomatic in 73% (27/37), acute abdominal pain in 5% (2/37) and chronic abdominal pain in 22% (8/37). None of the hernia were incarcerated and none of the patients underwent emergent surgery. No significant correlation was noted between Spigelian hernia and causes of increased intra-abdominal pressure. 90% of our patients had other abdominal hernias. 30.9 was the mean BMI (20.8-69.1). CONCLUSION:Most of the Spigelian hernia occurred below the traditionally described hernia belt and the majority are of interparietal subtype that can be best diagnosed with MDCT in contrast to physical examination.

journal_name

Clin Imaging

journal_title

Clinical imaging

authors

Azar SF,Jamadar DA,Wasnik AP,O'Rourke RW,Caoili EM,Gandikota G

doi

10.1016/j.clinimag.2020.12.031

subject

Has Abstract

pub_date

2021-01-07 00:00:00

pages

131-138

eissn

0899-7071

issn

1873-4499

pii

S0899-7071(20)30547-7

journal_volume

pub_type

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MDCT imaging in Spigelian hernia, clinical, and surgical implications.