What should you know about cellular dermatofibroma pathology?

A dermatofibroma is a firm skin nodule made from fibrous tissue. The cellular subtype contains a denser concentration of cells and can be larger or deeper than a typical dermatofibroma. Pathologists assess the whole specimen, its borders and its microscopic pattern; the word cellular does not by itself mean cancer. A report may also mention whether the lesion reaches an edge of the sample, which helps the treating clinician decide whether further management is appropriate. A new or changing nodule can be discussed alongside information about [Skin Lumps](/symptoms/skin-lumps/).

Request an explanation of the complete pathology report and keep a copy with your clinical records. Ask whether the specimen was fully removed, whether the edges are clear and whether specialist pathology review is useful. Do not pick at the scar or repeatedly traumatise the area. If additional removal is advised, [Surgical Excision](/treatments/surgical-dermatology/excisional-surgery/) is a procedure the clinician can explain in relation to the lesion’s depth and location.

Seek review if the original nodule grows again, changes rapidly, bleeds without being injured, becomes persistently painful or develops an open area. After excision, increasing redness, warmth, swelling, pus, wound separation or fever can indicate a healing problem or infection. Bring the pathology report to the appointment so the examination and plan address the specific lesion.

What features confirmed cellular dermatofibroma? Were the margins clear? Do you recommend observation, a wider excision or specialist review? How should I monitor the scar, and when should it be examined again?