a Round Lump on the Sternocleidomastoid Muscle: What to Know

There is a round mass on the sternocleidomastoid muscle in the neck?

Hello Doctor, recently I noticed a round lump above the sternocleidomastoid muscle on the right side of my neck (near the jawline).
It is less than two centimeters in size and initially felt somewhat flat (but had a round sensation).
After I touched it, it became swollen and larger.
If I refrain from touching it for a few days, it shrinks down to a size where I have to search for it.
However, when I touch and press it again, it swells up once more, and this cycle continues.
It has remained in the same location without disappearing.
I would like to ask if this could possibly be a malignant tumor? I am very worried and scared.
Thank you, Doctor!

Miss Zhan, 20~29 year old female. Ask Date: 2022/07/10

Dr. Ji Zhaoyun reply Otolaryngology

Hello, it could be lymphoid hyperplasia, a tumor, or a congenital cyst, among other possibilities.
It is advisable to consult an otolaryngologist if symptoms persist.

Reply Date: 2022/07/10

More Info

When it comes to a round lump on the sternocleidomastoid muscle, there are several factors to consider in order to understand its nature and whether it could be a cause for concern. The sternocleidomastoid muscle is a prominent muscle in the neck that plays a crucial role in head movement and stability. A lump in this area can arise from various conditions, and it’s important to evaluate the characteristics of the lump, associated symptoms, and any relevant medical history.

From your description, the lump is round, less than two centimeters, and exhibits changes in size depending on whether you manipulate it. This fluctuation in size can be indicative of a few possibilities:
1. Lymphadenopathy: One of the most common causes of lumps in the neck is swollen lymph nodes. Lymph nodes can enlarge in response to infections, inflammation, or malignancies. If the lump is soft and tender, it may suggest an inflammatory process, such as an infection.

2. Lipoma: A lipoma is a benign tumor made up of fatty tissue. These are usually soft, movable, and painless. They can vary in size and are generally not a cause for concern unless they grow significantly or cause discomfort.

3. Cyst: A cyst, such as an epidermoid cyst, can also present as a round lump. These are typically benign and can fluctuate in size, especially if they become inflamed or infected.

4. Muscle or Fibrous Tissue: Sometimes, lumps can arise from muscle tissue or fibrous tissue, which may be benign and not indicative of any serious condition.

5. Malignant Tumors: While it is natural to be concerned about the possibility of a malignant tumor, especially given the fluctuating nature of the lump, malignancies in this area are less common. If the lump is hard, fixed, and associated with other symptoms such as weight loss, night sweats, or persistent pain, further evaluation would be warranted.

Given that the lump changes size based on manipulation and returns to a smaller size when left alone, it is less likely to be a malignant tumor, but this does not completely rule it out. The best course of action is to consult a healthcare professional who can perform a physical examination and possibly recommend imaging studies, such as an ultrasound, to better characterize the lump. In some cases, a biopsy may be necessary to determine the exact nature of the lump.

Additionally, if you notice any new symptoms such as difficulty swallowing, persistent pain, or changes in your voice, it is important to seek medical attention promptly.
In summary, while the characteristics of the lump you described may suggest a benign process, it is essential to have it evaluated by a healthcare provider to rule out any serious conditions. Early diagnosis and management are key to addressing any potential issues effectively. Please do not hesitate to reach out to a medical professional for further evaluation and peace of mind.

Similar Q&A

Understanding Thyroid Nodules and Cartilage Issues in the Neck

Hello Doctor: I would like to ask about a solid mass located in front of my left sternocleidomastoid muscle, approximately the size of a ten-dollar coin. It feels like an eraser, and there is no pain whether I press on it or not. An endocrinologist mentioned that it could be an e...

Dr. Ji Zhaoyun reply Otolaryngology
Hello, based on your description, the neck mass could potentially be a thyroid tumor, thyroid calcification, lymphoid hyperplasia, congenital tumor, malignant tumor, among others. If the symptoms persist and the condition is progressing, it is advisable to consult an otolaryngolo...

Is a Prominent Left Sternocleidomastoid Muscle Normal? Insights and Advice

Hello doctor, during this summer in July and August, I noticed that the left side of my neck feels more prominent than the right side, although it is soft and does not feel like a hard lump. When I turn my head, the protruding area seems to be the sternocleidomastoid muscle. Toda...

Dr. Zheng Jueyi reply Otolaryngology
Hello, the two sides may not necessarily be symmetrical and could have slight differences. If you are concerned, it is advisable to visit a hospital or clinic for an examination by an otolaryngologist, or to assess whether an ultrasound examination is needed. Wishing you safety a...

Is That Lump Under My Ribs a Tumor? What You Need to Know

I have a question! There is a round mass located above my abdomen, just below the rib cage, about the size of a takoyaki ball. Could this be a tumor? Or do I need to undergo an examination to find out? Before any tests, what potential harm could this mass cause to my body, such a...

Dr. Cai Jueren reply Family Medicine
Hello: The area you mentioned is anatomically located at the lower edge of the sternum. Some individuals may have a more prominent feature while others may not. There is no need to worry unless you experience tenderness, in which case you should see a doctor. Thank you for your i...

Understanding Chest Lumps: What You Need to Know About Tumors

Hello, I am a middle-aged male. I have a hard lump in my chest, which is larger than a ten-dollar coin. The lump is located at the area of the sternum in a V-shape. It feels as if it is connected to the bone, and its hardness is similar to that of bone. Pressing on the lump cause...

Dr. Fan Sheng reply Oncology
Young man: Not yet forty, why should I be called middle-aged? I prefer to see myself as young. What you are concerned about is the xiphoid process. It is a normal anatomical structure that everyone has; you are not alone in this. Please try to relax.