Search Results for: cysts

Differential Diagnosis in Dermatopathology

"Pseudolymphoma," B-cell type vs. Malignant lymphoma, B-cell type

…aceous units, especially infundibula, that may manifest itself 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…

Segmental neurofibromatosis presenting with congenital excessive skin folds

Segmental neurofibromatosis presenting with congenital excessive skin folds

…irth, according to the patient’s parents) was also palpated. Ultrasonographic examination of the lower back was negative for cysts, bony involvement, or muscular abnormalities. Ultrasound of the skull confirmed the presence of a benign bony…

Differential Diagnosis in Dermatopathology

Discussions

…mors that have no distinguishing features. Not uncommonly, clinicians misinterpret both apocrine and eccrine mixed tumors as cysts and incise the lesions rather than attempt to excise them, a maneuver that often results in an artifactual cleft being…

Differential Diagnosis in Dermatopathology

Sebaceous hyperplasia vs. Nevus sebaceus of Jadassohn

…aceous units, especially infundibula, that may manifest itself 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…

Metastatic papillary thyroid carcinoma to the nose mimicking basal cell carcinoma: report and review of cutaneous metastases of papillary thyroid cancer

Metastatic papillary thyroid carcinoma to the nose mimicking basal cell carcinoma: report and review of cutaneous metastases of papillary thyroid cancer

…laques, papules or nodules. They can mimic other conditions such as alopecia, infections (erysipelas and paronychia), benign cysts (epidermoid or pilar), pyogenic granuloma and cutaneous malignant neoplasms (basal cell carcinoma and keratoacanthoma)…

An atypical pigmented lesion

An atypical pigmented lesion

…th dermal dislocation, composed of a well-defined nodule in the middle surrounded by small nests in which multiple keratinic cysts can be identified (red arrows). Some of them are locus of dystrophic calcification (green arrows). The neoplasia is…

Histologic Diagnosis of Inflammatory Skin Diseases

Granuloma annulare

…other inflammatory cells, e.g., lymphocytes in the case of granuloma annulare and neutrophils in the example of infundibular cysts that have ruptured. Parenthetically, authentic elastic fibers also may be phagocytized by mechanisms similar to the…

Non-choroidal yellow melanoma showing positive staining with Sudan Black consistent with the presence of lipofuscin: a case report

Non-choroidal yellow melanoma showing positive staining with Sudan Black consistent with the presence of lipofuscin: a case report

…ital type nevus [10]. In a study of 400 BCCs Bellucci et al. found that 10% displayed yellow structures either as milia-like cysts (7.75%) or lobular structures (4.2%) [11], also presumably due to keratin. There was no accumulation of keratin to…

Differential Diagnosis in Dermatopathology

Discussions

…s benign and malignant neoplasms of sebaceous, eccrine, apocrine, or follicular differentiation, and follicular and apocrine cysts and cystic hamartomas. It used to be a matter of faith that the neoplasm most common in nevus sebaceus is basal-cell…

Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

…aceous units, especially infundibula, that may manifest itself 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…