Comprehensive Proctology Tests and Diagnosis

Complete Range of Proctology Tests

At PACE Hospitals, Hyderabad, we provide advanced diagnostic tests for proctology conditions to accurately evaluate disorders affecting the anus, rectum, and lower digestive tract. The range of proctology diagnostic tests available at our centre is structured below to support early detection, precise diagnosis, and effective treatment planning.

Clinical Examination and Office-Based Assessment

Detailed anorectal examination

A detailed anorectal examination is the first step in diagnosing most proctology conditions. During this evaluation, the doctor carefully inspects the area around the anus and may gently examine inside the anal canal. This helps identify visible problems such as hemorrhoids, fissures, fistula openings, swelling, skin changes, or infections. The test is simple and usually done in the outpatient setting. By directly observing and feeling the area, the doctor can quickly narrow down the possible causes of symptoms like pain, bleeding, or discharge and decide if further tests are needed.

Digital rectal examination (DRE)

Digital rectal examination (DRE) involves the doctor gently inserting a gloved, lubricated finger into the rectum to assess internal structures. This test helps detect abnormalities such as masses, tenderness, tightness of muscles, or impacted stool. It is especially useful in detecting conditions like rectal tumors, enlarged hemorrhoids, anal stenosis, or pelvic floor dysfunction. Although it may feel slightly uncomfortable, it is a quick test and provides valuable information about the anal canal and rectum.

Anoscopy

Anoscopy is a simple procedure where a small tube (called an anoscope) is inserted a short distance into the anal canal to get a clear view of its inner lining. This allows the doctor to directly see internal hemorrhoids, fissures, inflammation, or small growths that may not be visible externally. It is commonly used when a patient has symptoms like rectal bleeding or itching. The procedure is quick, usually painless, and helps confirm the exact source of the problem.

Proctoscopy

Proctoscopy is a diagnostic procedure used to examine the rectum and anal canal by inserting a short, rigid instrument called a proctoscope. It allows direct visualisation of the rectal lining under light, helping doctors identify abnormalities such as hemorrhoids, fissures, polyps, inflammation, infections, or tumors. Through this procedure, the doctor can locate sources of bleeding, detect swelling or ulcers, and assess any abnormal growths. If required, a biopsy can also be taken during proctoscopy to confirm the diagnosis.

Rigid sigmoidoscopy

Rigid sigmoidoscopy is a procedure in which a doctor uses a rigid, hollow tube with a light at the end to look inside the lower part of the colon (specifically the sigmoid colon, which is the last part of the large intestine before the rectum). This test used to detect conditions like inflammation, tumors, or polyps in the lower bowel. It’s commonly used if a person has symptoms like rectal bleeding, abdominal pain, or unexplained changes in bowel habits. The procedure is quick and is done by inserting the tube into the rectum, allowing the doctor to view the colon and possibly take samples of tissue for further testing. 

Endoscopic Evaluation

Colonoscopy

A colonoscopy involves a flexible tube with a camera to examine the inside of the large intestine (colon). It is done to check for signs of conditions like colorectal cancer, polyps, inflammation, or infections. In this procedure, the doctor can also take tissue samples (biopsies) for further testing. The procedure helps diagnose issues that may be affecting the lower part of the digestive system, including conditions like chronic diarrhea, blood in the stool, or unexplained weight loss.

Flexible sigmoidoscopy

This test is the same as a colonoscopy but only examines the lower part of the colon, called the sigmoid colon. It uses a flexible tube with a light and camera to look for abnormalities like tumors, polyps, or areas of inflammation. It is usually used in patients who have symptoms like bleeding or discomfort in the lower abdomen, or if there’s a need to screen for colorectal cancer. It’s less invasive than a full colonoscopy and requires less preparation, but it only looks at part of the colon.

Video proctoscopy

Video proctoscopy is a procedure where a small camera is used to look at the rectum and the lower part of the anus. It is mainly used to diagnose problems like hemorrhoids, anal fissures, or anal tumors. The camera allows the doctor to see detailed images of the area, which helps in diagnosing conditions that cause pain, bleeding, or itching around the anus. This procedure is quick and can help identify any abnormalities in the anal region that may be causing symptoms.

Ultrasound and Cross-Sectional Imaging

Transrectal ultrasound (TRUS)

A transrectal ultrasound (TRUS) is a test where a small probe is gently inserted into the rectum to create images of the prostate and other structures in the pelvic area. It uses sound waves to produce these images. TRUS is mainly used to assess prostate health, including detecting issues like prostate cancer, enlargement, or infection. It can also be helpful in examining the surrounding tissues and muscles in the pelvic area, especially when there’s pain or unusual symptoms in that region.

Endoanal ultrasound

This ultrasound focuses on the anal canal. The doctor uses a small probe inserted into the anus to create images of the muscles and tissues around the anal area. It is hellpful for evaluating problems like anal fistulas, tears in the anal muscles (anal sphincter), or issues with continence (inability to control bowel movements). This test is often done when a patient experiences pain, bleeding, or discomfort in the anal region, and helps identify any structural problems.

Pelvic ultrasound

A pelvic ultrasound is used to create images of the organs inside the lower abdomen, such as the bladder, ovaries, uterus, and rectum. It’s commonly used to check for conditions like fibroids, ovarian cysts, or other pelvic disorders. And for men, it helps assess the bladder and prostate. This test is helpful if there are symptoms like pelvic pain, abnormal bleeding, or urinary issues.

MRI pelvis

An MRI of the pelvis is a detailed imaging test that uses strong magnets and radio waves to create clear images of the soft tissues in the pelvic area. This test helps diagnose a variety of issues, including tumors, inflammatory conditions, pelvic organ prolapse, and problems related to the reproductive organs. It’s especially useful for doctors to get a thorough view of the pelvic region when more detailed images are needed, like in cases of unexplained pain, abnormalities, or cancer screening.

CT scan abdomen/pelvis 

A CT scan of the abdomen and pelvis is an imaging test that takes detailed cross-sectional images of the organs inside the abdomen and pelvis. It is useful for detecting a wide range of conditions, such as infections, tumors, bowel obstructions, or kidney stones. CT scans provide more detailed images and can help the doctor see the size, shape, and position of organs and tissues. It’s commonly done if there’s unexplained pain, trauma, or when other tests are inconclusive.

Fistula and Structural Assessment

MRI fistulogram

An MRI fistulogram is a special imaging test that creates detailed pictures of a fistula, which is an abnormal connection between two parts of the body. In this case, the test is used to examine anal fistulas, which are small tunnels that can form between the anal canal and the skin around the anus. The procedure involves injecting a contrast material into the fistula tract, which helps create clearer images on the MRI scan. It helps the doctor understand the size, shape, and path of the fistula, and whether it affects surrounding tissues. This test is useful for planning treatment, especially when surgery may be required.

Contrast fistulography

Contrast fistulography is an imaging test used to evaluate anal fistulas. A special dye is injected into the fistula to help the doctor see the exact path of the fistula on an X-ray. The contrast makes the fistula more visible on the X-ray images, allowing the doctor to understand its size and how deeply it has affected nearby tissue. This procedure helps the doctor plan the best treatment for the fistula, whether that’s drainage, medication, or surgery.

Functional Anorectal Testing

Anorectal manometry

Anorectal manometry is a test that measures how well the muscles around the rectum and anus are working. During this test, a tube is inserted into the rectum, and a balloon inside the tube is inflated. The test checks the pressure of the anal sphincter muscles and how they respond to different sensations, such as squeezing or pushing. This test is mainly used to diagnose conditions like constipation, faecal incontinence (leakage of stool), or problems with bowel control. This test helps the doctor assess whether the muscles in the area are functioning properly and can help guide treatment for these issues.

Anorectal Electromyography (EMG) 

In anorectal EMG, small electrodes are placed on the skin around the anus to measure the activity of the anal sphincter muscles. It assists doctors in determining how well the muscles are working, particularly when there are issues such as incontinence or difficulties managing bowel motions. The test can also help identify nerve damage or muscle weakness that might be contributing to these issues. The tool is useful for understanding how well the muscles in the pelvic floor are functioning.

Balloon expulsion test

The balloon expulsion test is a simple procedure used to check how well you can expel stool from your rectum. In this test, a balloon is inserted into your rectum and filled with water. You are then asked to try to push the balloon out as if you were having a bowel movement. The test helps evaluate your ability to expel stool and can indicate if there are any issues with rectal emptying, such as constipation or pelvic floor dysfunction. It is often done when a patient is having trouble with bowel movements and can help identify the cause of constipation or incomplete emptying.

Pudendal nerve latency testing

This is a test used to measure how well the pudendal nerve, which controls the muscles of the pelvic floor and anus, is functioning. During the test, small electrodes are placed around the anus or perineum (that is the area between the anus and genitals). These electrodes detect electrical signals and measure how long it takes for the pudendal nerve to respond to stimulation. It aids in the diagnosis of nerve injury or malfunction, which can result in issues such as incontinence and difficulties managing bowel movements.

Defecography

Defecography provides a detailed view of the process of defecation. During the test, patient is asked to sit on a special toilet while a contrast material is inserted into the rectum. X-ray images or sometimes MRI are taken to observe how the rectum and anus function as the patient try to pass the contrast material. The test helps evaluate how well the rectum empties, if there are any blockages, or if there are issues with the muscles or structures that support the rectum. It’s commonly used to investigate problems like chronic constipation, rectal prolapse, or pelvic floor dysfunction, and provides important information about how the body handles bowel movements.

Infection, Inflammation and Tissue Evaluation

Swab cultures for perianal infections

This involves taking a small sample from the skin around the anus using a cotton swab. This sample is then sent to a lab where it is tested for bacteria, fungi, or other pathogens that may be causing an infection. This test is performed to diagnose conditions such as abscesses, cellulitis, or other skin infections around the anal area. If you're experiencing pain, swelling, or discharge near the anus, this test can identify the cause and guide appropriate treatment, such as antibiotics or antifungal medications.

Pus culture for abscesses

A pus culture is used to identify the bacteria or germs that may be causing an abscess, which is a collection of pus that forms when there’s an infection. If a patient has an anal abscess (a painful, swollen lump near the anus), the doctor will drain a sample of the pus and send it to a lab. The lab will test the sample to find out which bacteria or infection is causing the abscess. This helps the doctor choose the most effective treatment, often involving antibiotics or drainage of the abscess, to clear the infection.

Hemorrhoid thrombosis assessment

Hemorrhoid thrombosis is a condition that occurs when a blood clot forms inside an external hemorrhoid, causing severe pain and swelling. In this assessment, the doctor will physically examine the area around the anus and may use imaging (such as an anoscope or proctoscope) to rule out the presence of a clot. The doctor will check for signs like swelling, a hard lump near the anus, or blue coloring, which indicates a clot. Based on the findings, the doctor may recommend treatments like warm baths, medications, or sometimes even a minor procedure to drain the clot if necessary.

Biopsy of suspicious lesions

A biopsy of suspicious lesions involves taking a small sample of tissue from an abnormal growth or lesion found in the anal or rectal area. The doctor will use a needle or small surgical tool to remove the tissue, which is then sent to a lab for examination. This test helps determine if the lesion is non-cancerous or cancerous, or if it has any other concerning characteristics. 

Screening for HPV-related anorectal lesions

Human papillomavirus is a virus that can lead to abnormal growths or lesions in the genital and anal region. Screening for HPV-related anorectal lesions involves checking for changes in the skin or tissues around the anus that might be caused by HPV infection. HPV-related lesions can sometimes lead to anal cancer, so this screening is important for identifying early signs, for people at higher risk due to factors like sexual behavior or a weakened immune system.

Tests for Bleeding Disorders and Associated GI Conditions

Stool occult blood test (FOBT)

FOBT is a simple test used to check for hidden (occult) blood in the stool. Even if a person don’t notice any blood in their stool, this test can detect small amounts that are not visible to the naked eye. It’s commonly used to screen for conditions like colorectal cancer, polyps, or gastrointestinal bleeding. If the test is positive, it doesn’t necessarily mean the patient have cancer, but it means further tests are needed to identify the source of the bleeding.

Stool microscopy and culture

This test involves examining a sample of the stool under a microscope to check for signs of infection or abnormalities. The stool is also cultured to grow and identify parasites, bacteria, or viruses that might be causing symptoms like diarrhea, abdominal pain, or vomiting. This test helps diagnose GI infections or conditions like bacterial gastroenteritis, parasites, or even inflammatory bowel diseases (IBD).

Fecal calprotectin 

Fecal calprotectin is a test that measures the level of a protein called calprotectin in the stool. High levels of calprotectin are a sign of inflammation in the intestines, which can be caused by conditions like inflammatory bowel disease (IBD. This test is useful in diagnosing and monitoring inflammatory conditions of the bowel, especially when symptoms like diarrhea, abdominal pain, or weight loss are present.

Rectal mucosal evaluation

This is a procedure where a doctor examines the lining (mucosa) of the rectum for signs of disease, such as inflammation, infection, or abnormalities. This may be done using an adjustable scope, similar to a colonoscopy but focused on the rectum. It helps diagnose conditions like infections, hemorrhoids, or inflammatory bowel diseases (IBD). The evaluation can also help assess the severity of conditions like proctitis (inflammation of the rectal lining) and guide treatment decisions.

Post-Treatment and Follow-Up Assessments

Healing assessment after fissure, fistula, or abscess treatment

This assessment is performed after treatment for conditions like anal fissures, fistulas, or abscesses, which involves the doctor evaluating how well the area has healed after treatment. For example, after surgery or other treatments for an anal fissure, an anal fistula, or an abscess, the doctor will check the area for signs of healing, such as reduced pain, absence of infection, and closure of any surgical wounds. This assessment helps ensure that the treatment was effective and that the condition has resolved properly.

Wound evaluation after minimally invasive proctology procedures

After a minimally invasive proctology procedure like a hemorrhoidectomy, laser treatment for anal fissures, or stapling, a wound evaluation is done to check how well the surgical site or treatment area is healing. The doctor will inspect the wound for signs of infection, proper tissue healing, or any kind of complications. This follow-up ensures that recovery is progressing as expected and that the procedure has successfully treated the underlying issue.

Follow-up imaging for complex fistula healing

This is used to monitor the healing process of a complicated anal fistula after treatment. Since complex fistulas can have multiple tracts or may involve deeper tissue, imaging tests like ultrasound or MRI are used to check for any remaining infection, abscess formation, or incomplete healing. This is important to ensure that the fistula has healed properly and to guide any additional treatment if necessary.

Anal continence evaluations

This evaluates the ability to control bowel movements. It involves checking the strength and function of the muscles that control the anus (anal sphincters) and evaluating how well the patient can hold in stool. This evaluation is important for patients if they are experiencing symptoms of incontinence or if someone has had surgery or treatment for conditions like anal sphincter damage or prolapse. The test helps determine the underlying cause of any continence issues and guides treatment or therapy to improve bowel control.

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