Fibroblastic connective tissue naevus pathology

Figure 2

Histology of fibroblastic connective tissue naevus

Fibroblastic connective tissue naevus is situated primarily in the reticular dermis, and often shows extension into the superficial subcutis (figures 1, 2). There may be a mild papillomatous epidermis. The lesional cells are bland spindle-shaped fibroblastic/myofibroblastic cells with indistinct pale eosinophilic cytoplasm and tapering nuclei, with no significant cytologic atypia or pleomorphism (figures 3, 4). These cells form short fascicles with no particular orientation to the overlying epidermis and are associated with a loose stroma composed of mainly delicate or wispy collagen bundles (figures 3, 4).

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