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

…hickness from cyst to cyst and even in the same cyst 8. Some cysts may be lined by sebaceous ductal epithelium 8. No cysts are lined by sebaceous ductal epithelium 9. No tubular structures 9. Tubular structures contain homogeneous eosinophilic ma…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…er 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 in…

Histologic Diagnosis of Inflammatory Skin Diseases

Foreign body reaction

…o 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-catag…

Differential Diagnosis in Dermatopathology

Discussions

Trichoadenoma and microcystic adnexal carcinoma at times resemble each other sufficiently to pose a dilemma diagnostic, even though the former is a hamartoma and the latter an adenocarcinoma. Both may have several findings histopathologic in common:…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

Dermatology Practical & Conceptual

Pigmented tumor in the nostril

Abstract A 64-year-old man was noted to have a single pigmented lesion in the nostril of his nose. Clinical examination revealed a 5 mm nodular growth and brown lesion. With a presumed clinical diagnosis of malignant skin tumor, a biopsy was perform…

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…have become bowed with formation thereby of tiny infundibular cysts. When infundibular cysts become larger, they tend to explode, releasing into the dermis the contents of them, to wit, cornified cells, sebaceous secretion, Staphylococcus epidermidi…