A chemo port is a small, flat disc about the size of a quarter that sits just under your skin, usually on your upper chest below the collarbone. Once healed, it looks like a slight bump or raised area under the skin, with no tubes or hardware visible on the outside. Most people can see or feel it if they know where to look, but it’s easily hidden under clothing.
The Device Itself
Before implantation, a chemo port looks like a small metal or plastic disc with a raised center. That raised center is the septum, a self-sealing silicone rubber pad that a special needle can pierce hundreds of times without losing its seal. Underneath the septum is a small reservoir where medication collects briefly before flowing into your bloodstream.
Attached to the disc is a thin, flexible silicone tube called a catheter. This tube gets threaded into a large vein near your heart during placement. The whole assembly, disc plus catheter, is fully implanted under your skin. Nothing dangles outside your body, which is one of the main differences between a port and other options like a PICC line, where catheter “tails” stick out from your arm.
Some ports are designed to handle the high-pressure injection needed for contrast dye during CT scans. These “power-injectable” ports often have a triangular shape or tiny “CT” lettering stamped into them, visible on X-rays so medical staff can quickly confirm what type you have.
What It Looks Like Once Implanted
After the port is placed and the incision heals, you’ll notice a small bump on your chest. On thinner frames, the outline of the disc can be fairly visible. On larger body types, it may barely show at all. The bump is firm to the touch, and you can usually feel the edges of the disc and the slightly raised septum in the center if you press gently.
Placement typically involves two small incisions. One is at the base of your neck, about 1 to 1.5 inches long, where the catheter enters a vein (usually the jugular or subclavian vein). The second is smaller, roughly half an inch, on your chest below the collarbone. That’s where the surgeon creates a shallow pocket under the skin to hold the port disc in place. Both incisions leave small scars that fade over time. The neck incision scar often becomes nearly invisible within several months, and the chest scar sits right over or near the bump of the port itself.
While the upper chest is the most common location, ports can also be placed in the upper arm or abdomen depending on your treatment plan and anatomy.
What It Looks Like During Treatment
When it’s time for chemo, a nurse “accesses” the port by inserting a Huber needle through your skin and into the septum. A Huber needle has a specially angled tip that slices cleanly through the silicone rather than coring out a piece of it, which is what allows the septum to reseal every time. The needle connects to a short length of tubing taped to your chest, which then hooks up to your IV line.
While accessed, you’ll see a small, clear adhesive dressing over the needle site on your chest, with tubing running from it to the IV bag or pump. It looks similar to a standard IV setup, just located on your chest instead of your hand or arm. Once the infusion is done and the needle is removed, there’s nothing external left behind. Your chest goes back to looking the way it did before the appointment, with just the subtle bump of the port underneath.
How a Port Compares to a PICC Line
The biggest visual difference is what you see day to day. A PICC line leaves one or more catheter tubes hanging outside your upper arm at all times, secured with a dressing that needs regular changing. You have to keep it dry and protected between treatments. A port, by contrast, is completely internal. Between infusions, there’s nothing on the surface of your skin, no tubes, no dressings, no visible hardware. You can shower, swim, and wear whatever you want once the surgical site has healed.
PICC lines are typically used for shorter treatment courses, while ports are better suited for treatments lasting months or longer, partly because they’re lower maintenance and less disruptive to daily life.
Ongoing Care Between Treatments
When a port isn’t being used regularly, it needs to be flushed periodically to prevent blood clots from blocking the catheter. A nurse accesses the port with a Huber needle, pushes a small amount of saline or a saline-heparin solution through it, and removes the needle. The whole process takes just a few minutes. Most oncology teams schedule flushes every four to six weeks if you’re between treatment cycles or done with active chemo but keeping the port in place.
Ports can stay implanted for years if needed. When it’s time for removal, the procedure is similar in scale to placement: a short outpatient surgery with local anesthesia, a small incision over the port site, and a recovery period of about a week before the area fully heals.