A pen was taken out from a 76-yr-old British woman's stomach after 25 years of growth. Doctors were surprised when the pen despite the long stay in the woman's body still works.

The woman's medical case was chronicled by the British Medical Journal Case Reports. She was brought to a GI expert after experiencing a range of symptoms like weight loss.

Doctors discovered a linear unknown body in the stomach after her intestinal tract was scanned. After hearing the doctors' discovery, the woman suddenly remembered that she had swallowed a black felt-tip pen accidentally 25 years ago.

The pen was putrefied due to contact with the stomach acid for two long decades. It, however, still had functional ink which can be used for writing.

The woman explained to Dr. Oliver Richard Waters the incident that made her swallow the pen.

She slithered, fell and unintentionally swallowed the pen while interrogating a speck on her tonsil. Her general physician and husband sacked her story when basic abdominal films were analyzed and found out that everything is normal.

With gastroscopy, however, a felt-tip pen was seen positioning in the stomach's lumen without any signs of gastric problems. Although the pen was not the cause for the woman's health condition, doctors decided to schedule an operation to remove it.

Dr. Waters concluded that the woman's medical case emphasized that basic abdominal x-rays may not be effective enough in figuring out consumed plastic materials. Scan results from abdominal x-rays may be worth trusting, but definitely not adequate.