A strange green bruise on the arm of a woman practicing acrobatic yoga has turned into a rare tumor. Health report published in the journal JAMA Dermatology.
A woman in her 30s went to the doctors two years after a dislocated hand that left a greenish bruise on her arm. Using X-rays, the scientists found a tumor in the soft tissues of the hand, and magnetic resonance imaging (MRI) showed a small mass lying just under the skin.
The tissue taken from the tumor was found to be filled with fat cells, the iron-containing pigment hemosiderin, and long, thin spindle-shaped cells. The latter occurs in various tumors of the skin, mucous membrane of internal organs, bones and soft tissues.
Doctors found that the woman had fibrohistiocytic lipoma, a rare type of tumor that most often occurs in the foot or ankle. This condition was first described in 2000. Studies show that these abnormal growths are usually benign and rarely turn into cancer.
The exact causes of the formation of a rare tumor and the role of trauma in it are not yet known. Doctors who first described fibrohistiocytic lipoma noted that the formations can occur as a result of severe inflammation after an injury. Other scientists have suggested that damage to blood vessels may somehow stimulate tumor formation.