<prompt> Spigelian hernia is seen in -Lumbar triangleSubumblical regionParaumblical regionSupraumblical region  <response>: A spigelian hernia occurs through the spigelian fascia, which is composed of the aponeurotic layer between the rectus muscle medially and the semilunar line laterally.Nearly all spigelian hernia occur at or below the arcuate line Arcuate line lies midway bw the umbilicus and the pubic symphysisSpigelian hernias are variety of intraparietal hernia with the hernial sac dissecting beneath the internal oblique muscles. More often, it advances through the muscle and spreads out like a mushroom between the internal and external oblique aponeurosis.It is seen in older age group 50 yrs of ageMost spigelian hernias are small and present with localized pain in the area without a bulge because the hernia lies beneath the intact external oblique aponeurosis - Ref. SabistonSpigelian hernias have a high incidence of strangulation because of the narrow rigid neck and should be repaired. 