A Clinical Atlas of 101 Common Skin Diseases

Atypical Mycobacterial Infections

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 punc…

Therapeutic Strategies in Dermatology

Vitiligo: Initial Evaluation

Initial Evaluation Vitiligo Differential diagnosis Tinea versicolor Pityriasis alba Discoid lupus…

Therapeutic Strategies in Dermatology

Erythema Multiforme: Key Points

Key Points Erythema multiforme (EM) is a clinical syndrome marked by either target lesions and/or mucosal erosions. It may be idiopathic or seen in association with infections or medications. EM has been reported in association with herpes simplex…

Dermatology Practical & Conceptual

Enlarging plaque on the face with enlarged supraorbital nerve

…was not performed. What is your diagnosis? Answer: Tuberculoid leprosy with reversal reaction (also called “reactional tuberculoid leprosy” or “low resistant tuberculoid leprosy”). Discussion Leprosy or Hansen disease is a hum…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema nodosum leprosum

…ender nodules in a patient with diffuse or nodular lepromatous leprosy, whereas a diagnosis of Lucio’s phenomenon is established clinically on the basis of hemorrhagic infarcts in a patient with diffuse lepromatous leprosy, i.e., a patient devo…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…them having a bluish cast + 10.57.1C + 10.57.1D = Leprosy, lepromatous When slightly foamy histiocytes have a bluish hue, it means that their cytoplasm houses countless mycobacteria, either those of leprosy of those of infection by atypi…

Differential Diagnosis in Dermatopathology

Discussions

…he similarities, in most instances sarcoidosis and tuberculoid leprosy may be differentiated from one another if the criteria preceding are sought and found. Tuberculoid leprosy is one of the two major manifestations of leprosy, a disease caused by a…

Differential Diagnosis in Dermatopathology

Study By Disease

…nodular histopathologically (Quiz #479) Borderline tuberculoid leprosy in conjunction with type I leprosy reaction (Quiz #845) Borderline tuberculoid leprosy with type I reaction (Quiz #844) Borderline-tuberculoid leprosy in conjunction with type I l…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…ing cohesiveness) are predominant in granulomas of tuberculoid leprosy, whereas foamy histiocytes monopolize in granulomas of lepromatous leprosy; both epithelioid histiocytes and foamy histiocytes are present together in granulomas of dimorphous lep…