Erythromelanosis follicularis faciei et colli is an erythematous pigmentary disease involving the follicles, characterized by a reddish-brown, sharply demarcated, symmetrical discoloration involving the preauricular and maxillary regions.[1]: 775–6
Signs and symptoms
Erythromelanosis follicularis faciei et colli is characterized by patches of erythema (with or without telangiectasia), follicular papules (follicular plugging), and bilateral and symmetrical hyperpigmentation (reddish-brown pigmentation) that start on the preauricular areas and cheeks and can eventually migrate to the submandibular portions of the neck.[2]
Causes
Although the cause of this disorder is unknown, familial cases, spontaneous mutation, and an autosomal recessive pattern of inheritance have all been documented.[3][4]
Diagnosis
Histopathologic observations include vascular dilatation in the upper dermis, hyperkeratosis, follicular plugging, and enhanced basal membrane pigmentation.[5]
^YANEZ, S.; VELASCO, J. A.; GONZALEZ, M. P. (1993). "Familial erythromelanosis follicularis faciei et colli-an autosomal recessive mode of inheritance". Clinical and Experimental Dermatology. 18 (3). Oxford University Press (OUP): 283–285. doi:10.1111/j.1365-2230.1993.tb02190.x. ISSN0307-6938.
