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what is this bony lump on my tailbone

A 30-year-old female asked:
Dr. William Singer
50 years experience Pediatric Neurology
Inion: You are describing the bone at the back of the head at the midline base called the inion. A normal finding.

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A male asked:
Dr. Richard Zimon
58 years experience Internal Medicine
I assume you meant: :Bone not "phone and it sound like an exostosis (bony spur) from one of your ribs. Get it checked out but it sounds benign! Hope this helps Dr Z
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A 73-year-old female asked:
Dr. Frank Kuitems
38 years experience Internal Medicine
Many: Could be a cyst or tumor abscess. Need doctor visit to diagnose and treat
A 30-year-old female asked:
Dr. Louis Gallia
44 years experience Oral and Maxillofacial Surgery
Probably benign: Probably benign osteoma. However, see ENT doc for exam/recommendations.
A 46-year-old member asked:
Dr. Ahmad M Hadied
48 years experience Orthopedic Surgery
Healing of the bone: A large bump over the fracture site may develop as the fracture heals. This usually gets smaller over time, but a small bump may remain permanently.
A 55-year-old member asked:
Dr. Ronald Krauser
51 years experience Rheumatology
See details: It depends of which joint. It may be bony enlargement secondary to osteoarthritis. It may be a synovial cyst. If you are concerned have it evaluated a ... Read More
A 30-year-old female asked:
Dr. Anuj Sonawala
18 years experience Pathology
See Dermatologist: A hard bump in the head could in fact be one a several things such as: lipoma, benign cysts, foreign body granuloma, Various bony/soft tissue tumors, ... Read More
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A 44-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Don't know. Maybe a: Cyst or a pimple. There are a # of possible causes. The best way to get an accurate diagnosis would be dermatological evaluation.
A member asked:
Dr. Edward Hellman
28 years experience Orthopedic Surgery
Possibly: Several different possibilities, consider being seen. Among the more common causes is a pilonidal cyst. An exam can usually determine the cause.
A 22-year-old female asked:
Dr. Tariq Niazi
42 years experience Orthopedic Surgery
Could be a Bony les-: Ion, like an ecchondroma ( benign condition). It could be the healing bone (callus) as some pts do get a fx without realising it. Have yourself seen b ... Read More
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A 41-year-old member asked:
Dr. Robert Henderson
46 years experience Orthopedic Spine Surgery
Lipoma: If it is in the midline fairly symmetrical, non-tender.
A 56-year-old member asked:
Dr. John Munshower
29 years experience Family Medicine
?pilar cyst: Without an exam, it is impossible to tell exactly what your "squishy bump" is. Cysts are common though. Get checked by dr., good luck.
A 42-year-old member asked:
Dr. Robert Kornfeld
40 years experience Podiatry
Bakers Cyst: It may be a bakers cyst which is associated with arthritis.
A 35-year-old female asked:
Dr. Ellen Altenburg
30 years experience Pediatrics
? lymph node: Could be a lymph node or cyst if it moves around. Hard to tell without an examination. If it's on the other side as well, could just be a prominence o ... Read More
A 41-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Medical evaluation.: Please see a dermatologist for evaluation. Take care.
A 22-year-old male asked:
Dr. Edward Hellman
28 years experience Orthopedic Surgery
Probably: I do have a lot of patients that come to my office complaining of a "boney lump" as you call it at the back of the neck. It is usually the spinous pr ... Read More
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A 27-year-old female asked:
Dr. Erik Borncamp
24 years experience Wound care
Growing?: Hard to say without examining you. Possibilities include fatty tumors(benign), cysts, abscesses? Calcified lesions? Cancer is very rare. If it ha ... Read More
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A 30-year-old female asked:
Dr. Camilla Graham
26 years experience Infectious Disease
Lymph node: This sounds like a reactive lymph node. It can be swollen from a small cut (like from shaving) or other infection in the groin or leg area. It should ... Read More
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A 23-year-old male asked:
Dr. Raymond Wittstadt
35 years experience Hand Surgery
Costochondritis?: IF this bump is associated with one of your ribs, it could be due to separation of the costochondral junction. Usually this is due to a trauma. If no ... Read More
A 30-year-old male asked:
Dr. Ayisha Gani
Specializes in Internal Medicine
Knee cap: Patella is another name for knee cap, Do you have it below or at the lower part of the knee cap. It may be bony spicule. If it does not get bigger and ... Read More
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A 28-year-old female asked:
Dr. Heidi Fowler
24 years experience Psychiatry
This could be an: Enlarged lymph node (a cyst is also a possibility) - if not resolving within several weeks or if it becomes red, hot, more enlarged or tender - seek m ... Read More
A 50-year-old member asked:
Dr. Mueeza Zafar
46 years experience Family Medicine
Get this checked out: You need to get this looked at, by your doctor, especially if this has not always been there. When did you notice it, and is it painless or painful ?
A 29-year-old female asked:
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
Infection?: If it hurts, it is mostly likely an infection. At your age, cancer is not on the top of possibilities.
A 38-year-old female asked:
Dr. Donald Colantino
60 years experience Internal Medicine
Cartilage: This protuberance at the lower tip of the sternum is a cartilage structure called the xiphoid process and in some people it is very prominent. It shou ... Read More

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