Naevus lipomatosus superficialis is a rare lesion. It is regarded as a connective tissue naevus by most authorities. It can occur as either a single dermal papule or as a cluster of multiple papules and nodules.
Histology of naevus lipomatosus superficialis
Sections of naevus lipomatosus superficialis show mature adipose tissue within the superficial and mid dermis (figure 1). There are frequently foci of fibrosis intermixed with the fat (figure 2).
Naevus lipomatosus superficialis pathology
Special studies for naevus lipomatosus superficialis
None are needed.
Differential diagnosis of naevus lipomatosus superficialis
Fibrolipoma – Solitary naevus lipomatosus superficialis is histologically identical to fibrolipoma.
Normal fat – Unremarkable adipose tissue is not seen in the superficial dermis of normal skin.