Search Results for: suppuration

Histologic Diagnosis of Inflammatory Skin Diseases

Crohn’s disease

…in and subcutaneous fat of persons with Crohn’s disease are related overtly to the infiltrates of neutrophils, as when suppuration in association with pseudocarcinomatous proliferation of infundibular keratocytes is surrounded by epithelioid…

Differential Diagnosis in Dermatopathology

Discussions

…is, nodular vasculitis is associated with extensive lobular panniculitis that demonstrates every aspect of inflammation from suppuration through granulomas to fibrosis. The artery in nodular vasculitis displays extensive necrosis of smooth muscle…

Differential Diagnosis in Dermatopathology

Infundibular cyst vs. Isthmus-catagen cyst

Infection of skin and subcutaneous tissue by atypical mycobacteria, that is, mycobacteria other than those responsible for tuberculosis and leprosy, expressed clinically as keratotic and crusted papules, plaques, nodules, and tumors that may be…

Differential Diagnosis in Dermatopathology

Discussions

…ture, a foreign body reaction ensues in response to contents of the cysts that are spewed into the dermis. At first there is suppuration, then granulomatous inflammation, and, last, fibrosis. Historically, follicular cysts of the isthmus-catagen…

Differential Diagnosis in Dermatopathology

Discussions

…for any infections disease, no matter whether bacterial or fungal, when epithelioid histiocytes monopolize in the absence of suppuration or necrosis. With the assistance of the electron microscope, however, a few lepra bacilli may be detected,…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…ses in the dermis sometimes 6. Granulomas in conjunction with suppurative inflammation 6. Granulomas often in the absence of suppuration 7. No necrosis in association with granulomas 7. Caseous necrosis sometimes in the center of granulomas 8. Few,…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema nodosum

…filtrate of neutrophils mostly around venules and in the interstitium of fibrous septa in the subcutaneous fat; tiny foci of suppuration in septa exceptionally Neutrophils scattered at the periphery of fat lobules, sometimes in conjunction with…

Differential Diagnosis in Dermatopathology

Nodular vasculitis vs. Subcutaneous polyarteritis nodosa

Infection of skin and subcutaneous tissue by atypical mycobacteria, that is, mycobacteria other than those responsible for tuberculosis and leprosy, expressed clinically as keratotic and crusted papules, plaques, nodules, and tumors that may be…

Histologic Diagnosis of Inflammatory Skin Diseases

Polyarteritis nodosa

…lly, is seen at scanning magnification to involve the panniculus adiposus extensively in the form of necrosis of adipocytes, suppuration, granulomatous inflammation, and fibrosis. Rarely, polyarteritis nodosa is accompanied by formidable…

Histologic Diagnosis of Inflammatory Skin Diseases

Tuberculosis

…defenseless in the face of proliferation of tubercle bacilli and of the effects of them. Extensive necrosis (caseation) and suppuration result. Concurrent with these events, the bacilli enter lymphatics and travel to lymph nodes in the region,…