[Metastatic cervical fasciitis revealing invasive lobular breast carcinoma].

Background: We describe the case of a 71-year-old woman presenting cervical metastatic fasciitis with invasive lobular carcinoma (ILC) of the breast.

Patients And Methods: The patient consulted for a deep and painless skin infiltration of the neck associated with dysphagia and restricted cervical mobility. Skin and muscle biopsies were normal. Muscle fascia biopsy showed a linear infiltration of metastatic cells in "single file", revealing ILC of the right breast.

Discussion: ILCs have a particular metastatic pattern. They can permeate through tissue planes, infiltrate solid organs and spread on serous membranes in an insidious fashion.

Conclusion: Our case shows that ILC can metastasise into muscular fascia, causing "fasciitis-like" symptoms. Dermatologists should be aware of this particular pattern of dissemination.