Search Results for: isthmic-catagen cyst

Histologic Diagnosis of Inflammatory Skin Diseases

Telogen effluvium

…of common baldness. It may pose a problem in differentiation from normal scalp, not only because the number of follicles in catagen may be so few, but because, episodically, a single follicle in catagen may be seen in a section from a 4.0 mm…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…osed parallel to the skin surface, as well as to one another. Laminated orthokeratosis is found, too, in a type of epidermal cyst, i.e., an infundibular cyst, and in a “pseudocyst,” i.e., an infundibular tunnel in a lesion of seborrheic…

Histologic Diagnosis of Inflammatory Skin Diseases

Alopecia areata, totalis, universalis

…icles, i.e., 5 or 6 in a particular section of a 4.0-mm biopsy specimen, are in anagen; only two or three, at most, being in catagen or telogen. In alopecia areata, in contrast, follicles are unaffiliated with trichomalacia and most of them are…

Differential Diagnosis in Dermatopathology

Discussions

…dermis. The cornified cells within the cyst may be arranged in basket-woven, laminate, and compact fashion. In contrast, the cyst of steatocystoma is lined by epithelium just like that of a normal sebaceous duct. The lining is much thinner than that…

Histologic Diagnosis of Inflammatory Skin Diseases

Subcutaneous Fat: Panniculitis

…ipocytes and replacement of them by fine granules of amphophilic staining extracellular lipid) (Fig. 5.401A) Fat “microcysts” (spaces, which are not true cysts because they are not lined by epithelium, of various sizes that mark the site…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…ructures are found in rete ridges of infundibular epithelium 6. Numerous sebaceous ductal structures are found in lobules of isthmic epithelium 7. No cystic structures reside in infundibular rete ridges 7. Cystic structures reside in lobules of…