๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Follicular ichthyosis
Follicular ichthyosis
Follicular ichthyosis (ichthyosis follicularis) is an umbrella term or histologic pattern that is present in many conditions and is defined by follicular orthohyperkeratosis with or without hypergranulosis in the infundibulum.1 For differential diagnosis see Table 3.3.
76 Disorders of keratinization
A
A
B
B
Fig. 3.56 Conradi-Hรผnermann-Happle syndrome: (A) there is hyperkeratosis, acanthosis, and a reduced granular cell layer. Note the basophilic deposits within the thickened stratum corneum; (B) the basophilic deposits represent calcium as seen in this von Kossa preparation.
Table 3.3 Histologic patterns of ichthyotic skin disorders