Dermatology Practical & Conceptual

Dermatoscopic pattern of digital mucous cyst: report of three cases

Abstract Digital mucous cysts are benign ganglion cysts of the digits typically located on the dorsal aspect of the interphalangeal joint and distal phalanx of the digits. Usually the clinical diagnosis is straightforward, though sometimes it may mi…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…at and sometimes into fascia and skeletal muscles 3. “Cysts” always predominates 3. “Cysts” do not always predominate 4. “Cysts” distributed uniformly throughout the lesion 4. “Cysts” not distribute…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…r stage, sebaceous glands were more numerous and infundibular cysts were even more formidable. The cysts ruptured, suppuration and granulomatous inflammation ensued, and fibrosis, seen here, followed. In short, rhinophyma begins with formation of inf…

Histologic Diagnosis of Inflammatory Skin Diseases

Foreign body reaction

…matter how resolute. Corneocytes from ruptured infundibular cysts rival suture as the cause primary of foreign body granuloma in the skin (and subcutaneous fat). Cornified contents of epidermal (infundibular) cysts and of follicular (isthmic-catage…

Differential Diagnosis in Dermatopathology

Discussions

…s, and granulomatous foreign body reaction to ruptured “cysts” in sections of some specimens. Both conditions also tend to involve at least the entire dermis, and both have cornified cells inside cystic spaces. Criteria that allow them to…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

…solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve without residua or with scars of different types, e.g., keloidal or atrophic, including cri…

Dermatology Practical & Conceptual

Pigmented tumor in the nostril

…downward epithelial proliferation containing occasional horn cysts, which consists of two cell types, basal cells located in the periphery and malpighian cells in the center. These structures are named “squamous eddies.” Generally, the b…