Condition Lookup

Irritable Bowel Syndrome (IBS)

Category: Large Intestine (Colon) Disorders

Symptoms:
abdominal pain or cramping; bloating; gas; diarrhea; constipation; alternating diarrhea and constipation; mucus in stool

Root Cause:
Disruption in the normal function of the gut-brain axis leading to hypersensitivity of the intestines and abnormal motility patterns.

How it's Diagnosed: videos
Clinical history and symptom-based criteria (e.g., Rome IV criteria), exclusion of other conditions through blood tests, stool tests, and sometimes colonoscopy.

Treatment:
Dietary changes (e.g., low-FODMAP diet), stress management, physical activity, and symptom-specific therapies.

Medications:
Antispasmodics (e.g., dicyclomine ), fiber supplements, laxatives for constipation, loperamide for diarrhea, and antidepressants (e.g., tricyclic antidepressants or selective serotonin reuptake inhibitors) for managing pain and hypersensitivity.

Prevalence: How common the health condition is within a specific population.
Affects approximately 10-15% of the global population, with a higher prevalence in women and young to middle-aged adults.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Family history, stress, anxiety, depression, history of gastrointestinal infections, and food intolerances.

Prognosis: The expected outcome or course of the condition over time.
Chronic condition with varying severity; manageable with lifestyle modifications and treatment, but symptoms may persist intermittently.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Impacts quality of life, increased risk of depression and anxiety, and potential overlap with other functional disorders such as fibromyalgia.

Crohn’s Disease

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Inflammatory Bowel Diseases (IBD)

Symptoms:
abdominal pain; persistent diarrhea; fatigue; weight loss; fever; mouth sores; blood in stool; reduced appetite

Root Cause:
Chronic inflammation affecting any part of the gastrointestinal tract, most commonly the ileum and colon, caused by an abnormal immune response to intestinal microbiota.

How it's Diagnosed: videos
Clinical history, colonoscopy with biopsy, capsule endoscopy, CT or MRI enterography, blood tests (e.g., CRP, anemia, hypoalbuminemia), and stool tests.

Treatment:
Treatment involves anti-inflammatory medications, immune modulators, biologic therapies, dietary management, and, in some cases, surgical resection of affected bowel segments.

Medications:
Aminosalicylates (e.g., sulfasalazine , mesalamine ) for mild disease; corticosteroids (e.g., budesonide , prednisone ) for acute flares; immunomodulators (e.g., methotrexate , azathioprine ); biologics (e.g., adalimumab , ustekinumab ) targeting TNF or interleukins; antibiotics (e.g., metronidazole , ciprofloxacin ) for secondary infections or complications.

Prevalence: How common the health condition is within a specific population.
Affects about 780,000 people in the United States; incidence is rising globally, especially in developed nations.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Family history, smoking, urban lifestyle, Western diet, use of nonsteroidal anti-inflammatory drugs (NSAIDs), and younger age (typically diagnosed between 15-30 years).

Prognosis: The expected outcome or course of the condition over time.
Chronic condition with variable severity; periods of remission and exacerbation; not curable but manageable; surgery is often needed in severe cases.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Bowel obstruction, fistulas, abscesses, malnutrition, increased risk of colorectal cancer, osteoporosis, and extraintestinal manifestations like skin disorders and joint inflammation.

Ulcerative Colitis

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Inflammatory Bowel Diseases (IBD)

Symptoms:
persistent diarrhea; abdominal pain; rectal bleeding; urgency to defecate; fatigue; weight loss; fever

Root Cause:
Chronic inflammation and ulceration of the mucosal lining of the colon and rectum, likely due to an autoimmune response triggered by environmental and genetic factors.

How it's Diagnosed: videos
Clinical history, colonoscopy with biopsy, stool tests, blood tests (e.g., CRP, ESR), and imaging studies like CT or MRI enterography.

Treatment:
Treatment includes anti-inflammatory drugs, immune system suppressors, dietary changes, and in severe cases, surgery (proctocolectomy with ileostomy or ileal pouch-anal anastomosis).

Medications:
Aminosalicylates (e.g., mesalamine , sulfasalazine ) to reduce inflammation; corticosteroids (e.g., prednisone ) for acute flares; immunomodulators (e.g., azathioprine ) to suppress the immune response; biologics (e.g., infliximab , adalimumab ) targeting specific inflammatory pathways.

Prevalence: How common the health condition is within a specific population.
Affects approximately 1-2 million people in the United States, with incidence rates rising in many developed countries.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Family history, Caucasian or Ashkenazi Jewish ethnicity, living in urban or industrialized areas, younger age (usually diagnosed before age 30).

Prognosis: The expected outcome or course of the condition over time.
Chronic condition with periods of remission and flare-ups; manageable with treatment; surgery can be curative but has associated risks.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Increased risk of colon cancer, toxic megacolon, perforation, severe bleeding, malnutrition, and extraintestinal manifestations like arthritis and uveitis.

Adenocarcinoma

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Colorectal Cancer

Symptoms:
blood in stool; unintended weight loss; persistent abdominal pain; changes in bowel habits (diarrhea or constipation); fatigue; anemia

Root Cause:
Adenocarcinoma arises from glandular cells lining the colon or rectum, often due to mutations in the APC gene or other tumor-suppressor genes, environmental factors, and lifestyle-related risks.

How it's Diagnosed: videos
Colonoscopy with biopsy for histopathological analysis; imaging studies such as CT scans, MRI, and PET scans for staging; blood tests including CEA (carcinoembryonic antigen) levels.

Treatment:
Treatment involves surgical resection of the tumor, often combined with chemotherapy or radiation therapy based on the stage. Targeted therapies and immunotherapies may also be used.

Medications:
Chemotherapy drugs such as 5-fluorouracil (5-FU) and oxaliplatin (alkylating agent); targeted therapies like bevacizumab (VEGF inhibitor) and cetuximab (EGFR inhibitor); immunotherapies including nivolumab and pembrolizumab (PD-1 inhibitors).

Prevalence: How common the health condition is within a specific population.
The most common type of colorectal cancer, with an incidence of approximately 1.9 million new cases annually worldwide.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Age over 50, family history of colorectal cancer, inflammatory bowel disease (IBD), smoking, high-fat diet, sedentary lifestyle, obesity, alcohol consumption.

Prognosis: The expected outcome or course of the condition over time.
Survival depends on the stage at diagnosis. The 5-year survival rate is over 90% for localized disease but drops significantly for metastatic cases.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Intestinal obstruction, perforation, metastasis to liver or lungs, cachexia, and recurrence.

Chronic Constipation

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Functional Disorders

Symptoms:
infrequent bowel movements (fewer than three per week); hard or lumpy stools; difficulty passing stools; straining during bowel movements; feeling of incomplete evacuation; abdominal discomfort

Root Cause:
Slowed colonic transit or dysfunction of the pelvic floor muscles leading to difficulty in stool passage.

How it's Diagnosed: videos
Clinical history, physical examination, stool tests, colonoscopy (to rule out structural causes), and specialized tests like anorectal manometry or colonic transit studies.

Treatment:
Increased dietary fiber intake, adequate hydration, regular exercise, and behavioral therapy (biofeedback for pelvic floor dysfunction).

Medications:
Bulk-forming laxatives (e.g., psyllium), stool softeners (e.g., docusate), osmotic laxatives (e.g., polyethylene glycol), stimulant laxatives (e.g., bisacodyl ), and prokinetic agents (e.g., prucalopride for severe cases).

Prevalence: How common the health condition is within a specific population.
Affects approximately 15-20% of the population, with higher prevalence in older adults and women.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Low dietary fiber intake, sedentary lifestyle, dehydration, pregnancy, aging, and use of certain medications (e.g., opioids, anticholinergics).

Prognosis: The expected outcome or course of the condition over time.
Manageable with lifestyle and medical interventions; chronic cases may require ongoing management.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Hemorrhoids, anal fissures, fecal impaction, and rectal prolapse.

Clostridium difficile Infection

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Infectious Disorders

Symptoms:
watery diarrhea; abdominal pain or cramping; fever; nausea; loss of appetite; weight loss; fatigue; blood or pus in stool in severe cases

Root Cause:
Overgrowth of Clostridium difficile bacteria in the colon, often after disruption of normal gut flora due to antibiotic use. This leads to toxin production and colonic inflammation.

How it's Diagnosed: videos
Stool tests for C. difficile toxins (toxin A and B), PCR assays for toxin genes, and enzyme immunoassays; sometimes colonoscopy or imaging studies if complications are suspected.

Treatment:
Discontinuation of the offending antibiotic, initiating specific antibiotic therapy targeting C. difficile, fluid replacement for dehydration, probiotics, and in severe cases, fecal microbiota transplantation (FMT).

Medications:
Vancomycin (oral) or fidaxomicin are the primary treatments; metronidazole may be used in mild cases. Vancomycin and fidaxomicin are antibiotics specifically targeting C. difficile. Bezlotoxumab , a monoclonal antibody, may be used to reduce recurrence in high-risk patients.

Prevalence: How common the health condition is within a specific population.
Most common cause of healthcare-associated diarrhea; approximately 500,000 cases annually in the U.S.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Recent antibiotic use, hospitalization, advanced age, weakened immune system, gastrointestinal surgery, or a history of C. difficile infection.

Prognosis: The expected outcome or course of the condition over time.
With prompt treatment, most recover fully; however, recurrent infections occur in about 20% of patients. Severe cases can lead to complications, such as toxic megacolon or death.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Recurrence, dehydration, toxic megacolon, bowel perforation, sepsis, and death in severe cases.

Infectious Colitis (e.g., Viral, Bacterial, Parasitic)

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Infectious Disorders

Symptoms:
diarrhea (often with blood or mucus); abdominal pain; fever; nausea; vomiting; fatigue; dehydration; weight loss

Root Cause:
Infection of the colon by pathogens such as bacteria (e.g., Salmonella, Shigella, E. coli, Campylobacter), viruses (e.g., norovirus, rotavirus), or parasites (e.g., Entamoeba histolytica, Giardia). This leads to inflammation and damage to the intestinal lining.

How it's Diagnosed: videos
Stool tests for pathogens (culture, PCR, or antigen detection), blood tests for inflammatory markers, and colonoscopy in chronic or severe cases to assess mucosal damage.

Treatment:
Supportive care (hydration, electrolyte replacement) and pathogen-specific treatment. Antibiotics for bacterial infections, antiparasitic medications for parasitic infections, and sometimes antiviral therapy for severe viral infections.

Medications:
Antibiotics like ciprofloxacin or azithromycin for bacterial infections; metronidazole or tinidazole for parasitic infections like Giardia or Entamoeba; oral rehydration salts for dehydration. Antibiotics are categorized as antimicrobials, while antiparasitic drugs target protozoa.

Prevalence: How common the health condition is within a specific population.
Infectious colitis is a common cause of diarrhea worldwide, with bacterial pathogens accounting for 85% of foodborne outbreaks in developed countries.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Contaminated food or water, international travel, poor hygiene, immunosuppression, and exposure to infected individuals.

Prognosis: The expected outcome or course of the condition over time.
Most cases resolve within days to weeks with appropriate treatment, but severe infections can lead to prolonged illness or death, particularly in vulnerable populations.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Dehydration, electrolyte imbalances, hemolytic uremic syndrome (HUS, associated with E. coli O157:H7), chronic post-infectious irritable bowel syndrome, and intestinal perforation.

Diverticulosis

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Structural Disorders

Symptoms:
often asymptomatic; may include mild abdominal discomfort, bloating, constipation, or diarrhea.

Root Cause:
Formation of small pouches (diverticula) in the walls of the colon due to increased pressure, often associated with a low-fiber diet.

How it's Diagnosed: videos
Diagnosed through colonoscopy, CT scan, or barium enema; often discovered incidentally during routine screening.

Treatment:
Focus on dietary modifications, particularly a high-fiber diet; adequate hydration and physical activity are also recommended.

Medications:
Fiber supplements like psyllium or methylcellulose; in some cases, mild stool softeners may be prescribed. Antibiotics (e.g., ciprofloxacin , metronidazole ) are used only if diverticulitis occurs.

Prevalence: How common the health condition is within a specific population.
Common in adults over 50, with prevalence increasing with age; affects approximately 35–50% of people in Western countries.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Age, low-fiber diet, sedentary lifestyle, obesity, smoking, and family history of diverticulosis.

Prognosis: The expected outcome or course of the condition over time.
Generally benign; most people remain asymptomatic, though a small percentage may develop diverticulitis or bleeding.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Diverticulitis, perforation, abscess, fistula formation, and colonic bleeding.

Colonic Polyps

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Neoplastic Disorders

Symptoms:
typically asymptomatic; may include rectal bleeding, mucus in stool, or changes in bowel habits if polyps are large.

Root Cause:
Abnormal growths of tissue in the colon lining; can be benign (hyperplastic) or precancerous (adenomatous or serrated).

How it's Diagnosed: videos
Colonoscopy with biopsy, CT colonography, or sigmoidoscopy.

Treatment:
Removal during colonoscopy (polypectomy); regular surveillance based on pathology results.

Medications:
No direct medications; aspirin or NSAIDs may reduce polyp formation risk in high-risk individuals.

Prevalence: How common the health condition is within a specific population.
Affects 15–20% of adults in developed countries; prevalence increases with age.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Age, family history, high-fat diet, low-fiber diet, smoking, alcohol use, obesity, and sedentary lifestyle.

Prognosis: The expected outcome or course of the condition over time.
Good with removal; however, adenomatous or serrated polyps carry a risk of progression to colorectal cancer if untreated.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Potential for bleeding, bowel obstruction, and colorectal cancer if polyps are not removed.

Volvulus

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Structural Disorders

Symptoms:
sudden onset of abdominal pain, bloating, constipation, nausea, vomiting, and signs of bowel obstruction.

Root Cause:
Twisting of a segment of the intestine (commonly sigmoid or cecal), leading to obstruction and potential ischemia.

How it's Diagnosed: videos
Diagnosed via abdominal X-ray, CT scan, or contrast enema, showing a "whirl" or "coffee bean" sign.

Treatment:
Emergency treatment with endoscopic detorsion or surgical intervention (e.g., resection with or without anastomosis).

Medications:
No direct medications; supportive care may include intravenous fluids and antibiotics (e.g., piperacillin-tazobactam or ceftriaxone with metronidazole ) to manage infection risk.

Prevalence: How common the health condition is within a specific population.
Rare; more common in elderly patients, individuals with chronic constipation, or congenital intestinal malrotation.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Chronic constipation, previous abdominal surgery, adhesions, Hirschsprung disease, and elongated sigmoid colon.

Prognosis: The expected outcome or course of the condition over time.
Good with prompt treatment; untreated cases can lead to bowel ischemia, necrosis, and death.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Bowel ischemia, necrosis, perforation, peritonitis, and sepsis.

Lynch Syndrome (Hereditary Nonpolyposis Colorectal Cancer)

Specialty: Gastrointestinal

Category: Large Intestine (Colon) Disorders

Sub-category: Colorectal Cancer

Symptoms:
early onset colorectal cancer; blood in stool; abdominal discomfort; frequent urination (if urologic cancers develop); unexplained fatigue

Root Cause:
Caused by inherited mutations in mismatch repair (MMR) genes such as MLH1, MSH2, MSH6, or PMS2, leading to DNA replication errors and a predisposition to cancers.

How it's Diagnosed: videos
Genetic testing for MMR gene mutations; MSI (microsatellite instability) testing on tumor samples; family history assessment. Colonoscopy is often performed for screening.

Treatment:
Early-stage colorectal cancers are treated with surgery; advanced cases may involve chemotherapy. Prophylactic surgeries and regular surveillance are crucial for risk management.

Medications:
Chemotherapy drugs such as 5-fluorouracil (5-FU) and capecitabine (antimetabolites); immunotherapy options like pembrolizumab and nivolumab (PD-1 inhibitors) for MSI-high tumors.

Prevalence: How common the health condition is within a specific population.
Accounts for 2-4% of all colorectal cancers. Estimated prevalence of 1 in 300 individuals globally.

Risk Factors: Factors or behaviors that increase the likelihood of developing the condition.
Positive family history of Lynch syndrome, history of endometrial or other Lynch-associated cancers, and genetic predisposition through MMR gene mutations.

Prognosis: The expected outcome or course of the condition over time.
Early detection and proactive surveillance significantly improve outcomes. The overall prognosis is good for those who follow rigorous screening protocols.

Complications: Additional problems or conditions that may arise as a result of the original condition.
Development of additional Lynch-associated cancers (e.g., endometrial, ovarian, gastric), bowel obstruction, or metastasis in untreated cases.