Search Results for: isthmic-catagen cyst

A Clinical Atlas of 101 Common Skin Diseases

Dermatofibroma

An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous…

Therapeutic Strategies in Dermatology

Granuloma Annulare: Key Points

Key Points Granuloma annulare is a reactive inflammatory skin condition, which commonly presents as annular pink, erythematous thin plaques on the distal extremities. Granuloma annulare usually presents as localized disease, generalized plaques or…

Histologic Diagnosis of Inflammatory Skin Diseases

Hair Follicles

…ells arranged in a pattern unique to normal skin, except for that in follicles during the involutional phase of their cycle (catagen) when an appearance indistinguishable from that of isthmic epithelium is assumed by them. That epithelium, both of…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…fundibular cyst” is an epidermal cyst because the infundibulum is a component of the epidermis. In contrast, an “isthmiccatagen cyst” is a follicular cyst, the lining of it being like the isthmus of a follicle and of a follicle…

Differential Diagnosis in Dermatopathology

Infundibulo-folliculo-sebaceous cystic hamartoma vs. Steatocystoma

An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…mere supposition. 10.3.8A: Section of a biopsy specimen from a scalp, all follicles being in the same stage of devolution in catagen + 10.3.8B: Follicle in catagen and numerous melanophages in a fibrous track behind the follicle = Alopecia areata…

Differential Diagnosis in Dermatopathology

Discussions

…normal epithelial structure of skin that the lining of the cyst resembles most closely, e.g., infundibular cyst and isthmus-catagen cyst. Conventionally, cysts of the infundibular type have been termed epidermoid or epidermal cysts, epidermal…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…13. No sebaceous lobules in the lining of the cyst 13. Sebaceous lobules and individual sebocytes often in the lining of the cyst 14. Cyst surrounded often by altered connective tissue, e.g., numerous adipocytes intersected by fibrous septa, an…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Anagen Effluvium?

…gen hair that is formed in the process is shed approximately three months after the event that incited the follicle to enter catagen; when anagen begins anew, a new hair begins to be formed again. Telogen effluvium can be regarded as an…