The tumour is non-encapsulated, moderately circumscribed,  and extends through the whole dermis.

It is composed of spindle and stellate cells with slight nuclear atypia arranged in a loose storiform, partly fascicular growth pattern.

Occasional multinucleated stromal cells are present.

The neoplastic cells are embedded in a myxoid stroma.

There is an increased numbers of small blood vessels.

A few mast cells are noted. There are occasional mitotic figures.

Differential diagnosis: 

Includes benign and malignant myxoid and spindle cells tumours such as:

Fibrous Histiocytoma ;

Dermatofibrosarcoma Protuberans  ;

Acquired (digital) fibrokeratoma ;

Myxoid neurofibroma; Neurofibroma and variants

Sclerosing Perineurioma ;

Cutaneous myxoma (superficial angiomyxoma),and

Acral myxoinflammatory fibroblastic sarcoma.

Immunohistochemical finding:

The tumour cells may show focal positivity with CD34, EMA and CD99 may be positive in some and negative in others.

The tumour is usually negative for S-100 protein, HMB45 and alpha-smooth muscle actin and cytokeratin.

Alcian blue staining reveals abundant mucinous material within the stroma.

Recurrence rate of this tumor may be more than 20%.