Best Medical Oncologists for Targeted Therapy in Bengaluru, India

Colorectal cancer is a malignancy arising from the inner lining of the colon or rectum, most often developing from adenomatous polyps that undergo cancerous change over time. It encompasses both colon cancer and rectal cancer, which share many features but may differ in their surgical and treatment approach.

Common symptoms include a persistent change in bowel habits (such as diarrhoea, constipation, or narrowing of stools), rectal bleeding or blood in the stool, abdominal cramping or discomfort, a feeling that the bowel does not empty completely, unexplained weight loss, and fatigue related to anaemia from chronic blood loss. In earlier stages, many people have no noticeable symptoms at all, which underlines the importance of routine screening for eligible individuals. The presence or absence of these symptoms alone is not sufficient to confirm or rule out a diagnosis, and a thorough clinical evaluation is always required.

Diagnosis typically begins with a detailed medical and family history, a physical examination including digital rectal examination, and laboratory tests such as a full blood count and carcinoembryonic antigen (CEA) level. Colonoscopy is the definitive diagnostic procedure, allowing direct visualisation of the bowel lining and biopsy of any suspicious lesion for histological confirmation. Once cancer is confirmed, staging — commonly using CT scans of the chest, abdomen and pelvis, and sometimes MRI (particularly for rectal cancer) or PET-CT — is carried out to determine whether the disease is localised (Stage I–II), involves regional lymph nodes (Stage III), or has spread to distant sites (Stage IV), which directly guides treatment planning.

Treatment is highly individualised and depends on the cancer's location, stage, histological type, molecular markers (such as KRAS, NRAS, BRAF, and microsatellite instability status), and the patient's overall health. Early-stage disease may be managed with surgical resection alone, while more advanced cases often require a combination of surgery, chemotherapy, targeted therapy, and in some situations immunotherapy or radiotherapy (the latter particularly for rectal cancer). All treatment decisions should be made by a qualified multidisciplinary team following thorough individual assessment.

Non-surgical options play an important role in colorectal cancer care: chemotherapy regimens (such as FOLFOX or FOLFIRI) are used both as adjuvant treatment after surgery and as primary treatment for metastatic disease; targeted therapies (such as anti-VEGF or anti-EGFR agents) and immunotherapy (including checkpoint inhibitors for tumours with high microsatellite instability) may be recommended based on molecular profiling. For some patients with very early, superficial rectal lesions, endoscopic resection without open surgery may be appropriate. However, for the majority of confirmed colorectal cancer cases, surgery is a central component of curative-intent treatment, and whether a non-surgical pathway is suitable must be determined by a specialist team reviewing each individual case.

Targeted Therapy may be considered only when it is appropriate for the confirmed diagnosis and the expected benefit outweighs the individual risks. The decision may depend on symptom severity, investigation results, previous treatment, overall health and the patient's goals. A specialist should discuss alternatives and recovery before any procedure is planned.

Colorectal cancer is typically evaluated and managed by a surgical oncologist with colorectal expertise and a medical oncologist working within a multidisciplinary team that may also include a radiation oncologist, a gastroenterologist, a radiologist, and a pathologist. For rectal cancer in particular, a colorectal surgeon experienced in total mesorectal excision and related techniques is an important consideration.

When comparing providers, look for a surgeon with demonstrable experience in colorectal cancer resection and minimally invasive (laparoscopic or robotic) techniques, and confirm that the centre offers true multidisciplinary tumour board review, access to medical oncology and molecular testing, and a clear plan for post-treatment surveillance and follow-up.

Share a concise medical summary, symptom timeline, previous diagnoses, investigation and imaging reports, procedure or biopsy reports where relevant, current medicines, allergies and related treatment records. Provide clear copies with translations when needed. The reviewing doctor may request additional information before giving an opinion.

Our care coordination team can review the initial information, help identify suitable doctors and hospitals, request a medical opinion where available, explain next steps and indicative cost information, and support practical planning before travel. A remote opinion does not replace an in-person examination or emergency care.