A 45-year-old woman had no idea anything was wrong with her tongue. She had no pain, no bleeding, no trouble swallowing, and no feeling of something stuck in her throat. A dentist noticed a small bump near the back of her tongue during a routine checkup.
Specialists who examined her suspected a fibroma, one of the most common harmless growths in the mouth, or an irritated taste bud. When surgeons removed the lump and examined it under a microscope, they found something else entirely: mature bone sitting in the soft tissue of her tongue.
Émile Blanchette and Laurent Fradet of the Université de Sherbrooke and the CIUSSS de l’Estrie-CHUS in Quebec described the case on May 22, 2026, in SAGE Open Medical Case Reports. The condition is called lingual osseous choristoma, and the authors say just over 100 cases have been reported in the medical literature.
A Lump Small Enough to Pass for a Taste Bud
The growth sat on the left side of the back surface of her tongue. It measured about 0.6 by 0.5 by 0.3 centimeters, roughly the size of a pencil eraser, and had grown slowly.
On examination, it was firm, whitish, and well-defined, attached by a broad base. It was not ulcerated or tender, and she had no swollen lymph nodes in her neck.
Its location helped explain the first impression. The back of the tongue holds the circumvallate papillae, a V-shaped row of large bumps that house many of the tongue’s taste buds. People sometimes mistake them for abnormal growths when they first notice them. An irritated papilla was one of the doctors’ two leading guesses, along with a fibroma.
Because the lump was small, caused no symptoms, and looked benign, the team skipped imaging before surgery. The authors note that in selected cases, a CT scan can show these growths as a well-defined bright spot.
Bone Where It Has No Business Being
Surgeons removed the entire lump in an outpatient procedure under local anesthesia, without complications. The pathology report delivered the surprise. Beneath the tongue’s normal surface lining lay mature cortical bone, the dense type that forms the hard outer shell of the body’s bones. The lining showed no abnormal cells.
A choristoma is normal tissue growing in a place where it does not belong. It is not cancer. In this case, the misplaced tissue happened to be bone. The authors write that «surgical excision is both diagnostic and curative.»
The condition was first described in 1913 by Monserrat, who called it a lingual osteoma, according to the authors. When reviewing the tissue, they also considered a fibroma, a hemangioma and a bone-related condition called osseous dysplasia.
A Silent Case in a Condition That Often Causes Gagging
The woman’s lack of symptoms is part of what makes her case notable. A 2020 systematic review in the Spartan Medical Research Journal analyzed 69 patients from 35 publications. About 45% had no symptoms. Among those who did, about two-thirds reported gagging or a lump-in-the-throat feeling, and about 29% had trouble swallowing.
The same review found that 70% of patients were female, with ages ranging from 5 to 73 and an average of about 28. Most growths sat in the back third of the tongue and measured 0.5 to 2.5 centimeters. About 80% of those with a described base hung from a stalk, which makes this woman’s broad-based lump the less common form. Among the 49 patients treated with surgery, none had a recurrence.
Size can vary dramatically. Earlier this month, MedicalDaily reported on a 9-year-old girl in China whose golf ball-sized lump of bone at the base of her tongue was found after she developed snoring and trouble swallowing. The Quebec case sits at the opposite extreme: a growth small enough that its owner never noticed it.
Two Theories, and This Case Fits Neither Neatly
Researchers still debate why bone forms in the tongue. One theory holds that the growths arise from leftover embryonic tissue from the branchial arches, particularly the third, structures that help shape the head and neck during development. The authors note this does not fully explain growths found away from the foramen caecum, a small pit at the back of the tongue, or those that appear in adulthood.
The other theory proposes that chronic irritation or small injuries trigger nearby tissue to turn into bone. But many patients, including this woman, have no clear history of trauma. The authors suggest the condition may involve both mechanisms.
For her, the outcome was simple. Two years after surgery, her tongue had healed completely, with no recurrence. The authors say recurrence after complete removal is exceedingly rare.
The case also shows the value of a quick look inside the mouth. According to the National Institute of Dental and Craniofacial Research, a regular dental checkup is an excellent time for an oral cancer exam, and anyone with a sore, lump, or thick patch in the mouth that lasts more than two weeks should see a dentist or doctor. Most such lumps are benign, but only an exam, and sometimes a biopsy, can tell them apart.
Key Questions Answered
What did doctors find in the woman’s tongue?
A small lump on the back of her tongue contained mature bone, a rare benign condition called lingual osseous choristoma.
How was it discovered?
A dentist noticed it during a routine dental exam. She had no symptoms.
Is bone in the tongue dangerous?
It is not cancer. It is normal bone tissue in the wrong place, and complete surgical removal is usually curative.
How rare is it?
The authors say just over 100 cases have been reported since the first description in 1913.
Should people worry about bumps at the back of the tongue?
Many are normal taste bud structures or harmless growths. A sore, lump, or thick patch that lasts more than two weeks should be checked by a dentist or doctor.
Published by Medicaldaily.com
