Search Results for: lymphatics

Differential Diagnosis in Dermatopathology

Metastatic carcinoma from a breast vs. Morpheiform basal-cell carcinoma

Cutaneous and subcutaneous lesions, usually nodules, that have become keratotic, crusted, and ulcerated as a consequence of infection by a variety of deep fungi, i.e., fungi situated in the dermis and subcutis, some of which may be disseminated to o…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…rom a primary site by means of conduits (blood vessels and/or lymphatics) or across serosal surfaces. Error: Mid-dermal elastolysis is a specific type of atrophy distinct in itself. Reason: It is nothing other than a type of anetoderma, the primary p…

Histologic Diagnosis of Inflammatory Skin Diseases

Subcutaneous Fat

…ules. The fibrous septa also house muscle-containing vessels, lymphatics, and nerves. (x25) Arteries and veins in the subcutaneous fat are positioned within the major fibrous septa (Figs. 1.87 and 1.88). Smaller vessels that emanate from large blood…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…part of the dermis 5. Neoplastic cells found sometimes within lymphatics 5. Neoplastic cells are present within lymphatics 6. Neoplastic cells not “basaloid,” i.e., their cytoplasm is abundant 6. Neoplastic cells “basaloid,” i…

Differential Diagnosis in Dermatopathology

Discussions

…ted (similar to that in erysipelas) because of obstruction of lymphatics by the neoplastic cells Telangiectatic: purple papules, nodules, and hemorrhagic patches and plaques that resemble vascular neoplasms Nodular: deep-seated nodules that appear es…

Histologic Diagnosis of Inflammatory Skin Diseases

Blood Vessels

…comes into being because of an imbalance between leakage of serum into tissues and reabsorption of it by lymphatics. A cutaneous vasculature that functions properly is crucial, too, to resolution of inflammatory reactions and restitutio ad integrum….

Histologic Diagnosis of Inflammatory Skin Diseases

Introduction

…, structures of the dermoepithelial interface, blood vessels, lymphatics, collagen, elastic fibers, ground substance, muscles, and nerves. The strategy is to inform about how the skin looks by examination grossly and by inspection using conventional…

Histologic Diagnosis of Inflammatory Skin Diseases

Destombes-Rosai-Dorfman disease

…ltrate of foamy histiocytes Foamy histiocytes in the lumen of lymphatics Differential diagnosis histopathologic Xanthomas lack signs of karyophagocytosis and are devoid of large numbers of plasma cells. Histiocytosis X is constituted of abnormal Lang…

Histologic Diagnosis of Inflammatory Skin Diseases

Tuberculosis

…ation result. Concurrent with these events, the bacilli enter lymphatics and travel to lymph nodes in the region, where they ravage those structures. The combination of the primary site of inoculation and an affected regional lymph node is known as a…