Signs and Symptoms 
The characteristic sign of a plantar fibroma is a noticeable lump in the arch that feels firm to the touch. This mass can remain the same size or get larger over time, or additional fibromas may develop.

People who have a plantar fibroma may or may not have pain. When pain does occur, it is often caused by shoes pushing against the lump in the arch, although it can also arise when walking or standing barefoot.

Diagnosis
To diagnose a plantar fibroma, the foot and ankle surgeon will examine the foot and press on the affected area. Sometimes this can produce pain that extends down to the toes. An MRI, biopsy, or diagnosic ultrasound may be performed to further evaluate the lump and aid in diagnosis.

                      MRI                                Microscopic Biopsy                                Ultrasound