Pilonidal Disease
Fig. 6.1 Classical position for pilonidal sinus Fig. 6.2 Hair from pilonidal sinus (courtesy of Pankaj Garg, India) 6.4 Differential Diagnosis Furuncle, carbuncle, anal fistula (Fig. 6.3a, b), hidradenitis suppurativa,…
Benign Ulcers of the Anorectum
(i) Anal fissures (xvi) Rectal endometriosis (ii) Hemorrhoidal and varicose ulcer (xvii) Injury: (iii) Ulcer with mucosal prolapse Self-inflicted (iv) Crohn’s disease and ulcerative colitis Iatrogenic (v) Proctitis: Anal intercourse…
Anorectal Injuries
Grade Type of injury Description of injury I Hematoma Contusion or hematoma without devascularization Laceration Partial-thickness laceration II Laceration Laceration <50% of circumference III Laceration Laceration >50% of circumference IV…
Surgical Anatomy of Anal Canal and Rectum
Fig. 1.1 Anatomy of anorectum It is angulated at junction with the rectum because the pull of the sling-like action of puborectalis muscle forms anorectal angle (Fig. 1.2). It lies…
Physiology of Defecation
Fig. 2.1 Reflex mechanisms involved in defecation process The internal sphincter, the external sphincter, and the levator ani constitute the motor components. The internal sphincter unconsciously maintains continence by its…
