Causes of right lower quadrant abdominal pain

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Vendhan Ramanujam M.B.B.S [2]

Causes of Right Lower Quadrant Abdominal Pain

Life Threatening Causes

• Acute appendicitis
• Incarcerated inguinal hernia
• Intestinal volvulus
• Intussusception
• Ischemic colitis
• Ovarian torsion
• Septic arthritis
• Strangulation
• Testicular torsion
• Uterine torsion

Common Causes

• Acute appendicitis
• Crohn's disease
• Diverticulitis
• Ectopic pregnancy
• Endometriosis
• Ileitis
• Inguinal hernia
• Intussusception
• Ovarian torsion
• Pelvic inflammatory disease
• Ureteral colic

Causes by Organ System

Cardiovascular	Leaking aortic aneurysm, mesenteric ischemia
Chemical/Poisoning	No underlying causes
Dental	No underlying causes
Dermatologic	Herpes zoster
Drug Side Effect	No underlying causes
Ear Nose Throat	No underlying causes
Endocrine	No underlying causes
Environmental	No underlying causes
Gastroenterologic	Acute appendicitis, adhesions, ascending colon carcinoma, ascending colon obstruction, cecal carcinoma, cecal volvulus, colitis, Crohn's disease, ileal obstruction, ileitis, incarcerated inguinal hernia, inflammatory bowel disease, inguinal hernia, intestinal volvulus, intussusception, Meckel diverticulitis, mesenteric lymphadenitis, mesenteric ischemia, pseudo appendicitis, right sided diverticulitis, strangulation, terminal ileitis, typhilitis, yersinia enterocolitica gastroenteritis
Genetic	No underlying causes
Hematologic	No underlying causes
Iatrogenic	Adhesions
Infectious Disease	Adnexitis, colitis, cystitis, endometritis, herpes zoster, ileitis, lymphogranuloma venereum, pelvic inflammatory disease, psoas abscess, salpingitis, seminal vesiculitis, septic arthritis, terminal ileitis, transient synovitis, tuboovarian abscess, typhilitis, yersinia enterocolitica gastroenteritis
Musculoskeletal/Orthopedic	Hip dislocation, psoas abscess, septic arthritis, transient synovitis
Neurologic	No underlying causes
Nutritional/Metabolic	No underlying causes
Obstetric/Gynecologic	Ectopic pregnancy, endometrial stromal sarcoma, endometrioma, endometriosis, endometritis, fallopian tube torsion, hemorrhagic ovarian cyst, hydrosalpinx, infarction or torsion of ovarian cyst, infarction or torsion of uterine leiomyoma, malignant mixed Mullerian tumor, ovarian hyperstimulation syndrome, ovarian neoplasm, pelvic inflammatory disease, rupture of ectopic pregnancy, ruptured ovarian cyst, salpingitis, tuboovarian abscess, uterine torsion
Oncologic	Ascending colon carcinoma, cecal carcinoma, endometrial stromal sarcoma, endometrioma, infarction or torsion of uterine leiomyoma, malignant mixed Mullerian tumor, ovarian neoplasm
Ophthalmologic	No underlying causes
Overdose/Toxicity	No underlying causes
Psychiatric	No underlying causes
Pulmonary	No underlying causes
Renal/Electrolyte	Cystitis, Henoch-Schönlein purpura, renal colic, ureteral colic, ureterolithiasis, urolithiasis
Rheumatology/Immunology/Allergy	Colitis, Crohn's disease, Henoch-Schönlein purpura, inflammatory bowel disease
Sexual	Seminal vesiculitis, testicular torsion, torsion of epididymis
Trauma	Collision, falls, visceral laceration or rupture
Urologic	No underlying causes
Miscellaneous	Colonic pseudoobstruction, foreign body ingestion, inguinal lymphadenopathy

Causes in Alphabetical Order

• Acute appendicitis
• Adhesions
• Adnexitis
• Ascending colon carcinoma
• Ascending colon obstruction
• Cecal carcinoma
• Cecal volvulus
• Colitis
• Collision
• Colonic pseudoobstruction
• Crohn's disease
• Cystitis
• Ectopic pregnancy
• Endometrial stromal sarcoma
• Endometrioma
• Endometriosis
• Endometritis
• Fallopian tube torsion
• Falls
• Foreign body ingestion
• Hemorrhagic ovarian cyst
• Henoch-Schönlein purpura
• Herpes zoster

• Hip dislocation
• Hydrosalpinx
• Ileal obstruction
• Ileitis
• Incarcerated inguinal hernia
• Infarction or torsion of ovarian cyst
• Infarction or torsion of uterine leiomyoma
• Inflammatory bowel disease
• Inguinal hernia
• Inguinal lymphadenopathy
• Intestinal volvulus
• Intussusception
• Ischemic colitis
• Leaking aortic aneurysm
• Lymphogranuloma venereum
• Malignant mixed Mullerian tumor
• Meckel diverticulitis
• Mesenteric lymphadenitis
• Mesenteric ischemia
• Mittelschmerz
• Ovarian hyperstimulation syndrome
• Ovarian neoplasm
• Pelvic inflammatory disease

• Pseudo appendicitis
• Psoas abscess
• Renal colic
• Right sided diverticulitis
• Rupture of ectopic pregnancy
• Ruptured ovarian cyst
• Salpingitis
• Seminal vesiculitis
• Septic arthritis
• Strangulation
• Terminal ileitis
• Testicular torsion
• Torsion of epididymis
• Transient synovitis
• Tuboovarian abscess
• Typhilitis
• Ureterolithiasis
• Urolithiasis
• Ureteral colic
• Uterine torsion
• Visceral laceration or rupture
• Yersinia enterocolitica gastroenteritis