Introduction
Folliculitis keloidalis (also called folliculitis keloidalis nuchae) is better grouped as one of the neutrophilic scarring alopecia.
Histology folliculitis keloidalis nuchae
The low power view exhibits a dense surface and depth. inflammatory process with dermal scars and follicular interruption (Figure 1). There may be varying degrees of overlap scale Cortex with tufts hair follicles evident as multiple hair shafts within enlarged follicular infundibulae (Figures 1 and 2). In the dermis are altered hair follicles with scattered bare hair shafts seen within a fibrotic dermis (Figures 2 and 3). There is a dense lymphoplasmacytic infiltrate with scattered neutrophils (Figure 4).
Pathology of acne keloidalis nuchae
Figure 1
Figure 2
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Figure 4
Special spots in folliculitis keloidalis nuchae
PAS stain should always be performed to exclude a fungus infection.
Differential diagnosis folliculitis keloidalis nuchae
Folliculitis decalvanus: Although many features are shared, there are usually significantly fewer fibrosis in this condition. Clinical discrimination is reliable.
Hidradenitis suppurativa: Although the location and clinical details are discriminating, this condition will show breast treaties and large areas of abscess training.
Deep infectious folliculitis: in these cases, the inflammatory infiltrate tends to strongly form around the affected area. follicle with less extensive follicular disruption or dermal scarring. Special spots are also helpful here. In case of doubt, culture Studies should be recommended.