- A solid tumor forms in a specific organ, y blood cancers, such as leukemia, do not form a mass.
- Whether a tumor is benign or malignant is told by the biopsy, more than by its size or its appearance.
- The site and the stage decide the treatment as much as the cell type.
Solid versus «blood» cancers
Solid tumors form in a specific organ or tissue: breast, thyroid, colon, lung, skin, muscle. They differ from blood cancers, such as Cancer of the blood cells produced in the bone marrow. It does not form a mass. or Cancer of the lymphatic system. It can swell lymph nodes, but it is not a solid tumor of an organ., which affect circulating cells and do not form a localized mass. That difference determines the treatment: solid ones are often operated on, and blood ones are treated by another route.
Benign or malignant
A benign tumor grows slowly, does not invade what surrounds it and does not spread to other organs. A lipoma, a breast fibroadenoma or most thyroid nodules are examples. They are monitored, or removed if they cause symptoms. A malignant tumor is cancer: it invades neighboring tissue and can spread.
Benign
- Grows slowly
- Does not invade its surroundings
- Does not spread to other organs
- Monitored, or removed if it causes symptoms or grows
Malignant
- Invades neighboring tissue
- Can spread to other organs
- Carcinomas arise in the tissue lining organs and skin
- Sarcomas arise in bone, fat, muscle or vessels
From the outside they look much alike, and what allows them to be told apart is the biopsy.
Why the site matters as much as the type
The same diagnosis is treated differently depending on where it is and how much it has grown. A one-centimeter thyroid Cancer arising in the tissue lining organs and skin: breast, lung, colon, prostate, thyroid. and a colon carcinoma with lymph nodes are nothing alike in prognosis or surgery. That is why the first question at the consultation is not «is it cancer?» but «what exactly is it, where, and at what stage?». Biopsy and imaging answer that, not the word tumor.
The signs that get studied
- A new lump or mass, or one that is growing, anywhere in the body.
- Persistent pain in one specific place.
- Unexplained weight loss, tiredness that does not lift, fever without cause.
- Difficulty swallowing, a cough or hoarseness that persists.
- Changes in bowel or urinary habit, or unexplained bleeding.
None of these signs is cancer on its own, and all of them deserve a doctor's assessment. The path is always the same, and it is worth knowing so as not to skip steps or add ones that are not needed.
- 01ExaminationThe doctor examines the area and asks about the symptoms, and often that alone points toward the diagnosis.
- 02Blood testsBlood work and, depending on the site, specific markers.
- 03ImagingUltrasound, CT or MRI, depending on where it is.
- 04BiopsyIt is what confirms the diagnosis. Without it, everything above is a suspicion.
How they are treated
Surgery, usually the first step in localized solid tumors, and radiotherapy, and chemotherapy, and targeted therapies and immunotherapy, depending on the cell type, and hormonal therapy in hormone-dependent cancers, such as some breast cancers. Almost never just one: the combination is decided by a team, and the surgical oncologist is the one who organizes it around the patient.
