Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Parapsoriasis?

…parapsoriasis- Variant: digitate dermatosis      3. Pityriasis lichenoides           a. Pityriasis lichenoides et varioliformis acuta (Mucha-Habermann)           b. Pityriasis lichenoides chronica (Juliusberg)           c. Lymphomatoid papulosis Woo…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Lichen simplex chronicus Hypertrophic lichen planus 1. Granular zone thickened, but not with periodicity and in wedge shape 1. Granular zone often thickened focally at nearly periodic intervals and in wedge shape, especially in infundibula 2….

Differential Diagnosis in Dermatopathology

Discussions

…r) mucinosis. When pale-cell acanthosis occurs in a seborrheic keratosis, for example, the lesion may simulate pale-cell acanthoma closely, but the seborrheic keratosis may be recognized for what it is by the presence of laminated hyperkeratosis, tun…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Regression of lichen planus-like keratosis Regression of primary cutaneous melanoma 1. Signs of residual solar lentigo or reticulated seborrheic keratosis apparent in sections of tissue sometimes 1. No residual keratocytic neoplasm such as solar…

Dermatology Practical & Conceptual

See Classification of Pigmented Lesions

…sis of the nipple Benign neoplasms Solar lentigo, including lichen planus-like keratosis Seborrheic keratosis Malignant neoplasms Basal cell carcinoma, pigmented Solar keratosis, pigmented Melanocytic lesions Benign Melanosis Simple lenti…

Histologic Diagnosis of Inflammatory Skin Diseases

Fox-Fordyce disease

…ythematosus on one hand and noninflammatory conditions such as keratosis pilaris and phrynoderma on the other. The infiltrates of lymphocytes and the changes in surface epidermis eliminate lichen planus and discoid lupus erythematosus from being conf…

Differential Diagnosis in Dermatopathology

Pale-cell acanthoma vs. Psoriasis, plaque expression

…oided the use of trite expressions that abound in dermatology, like “silvery scales” for psoriasis, “footprints in the snow” for lichen planopilaris of the scalp, and “salmon color” for pityriasis rosea. Those banalities are not helpful to an inquisi…

Histologic Diagnosis of Inflammatory Skin Diseases

Hand-foot-and-mouth disease

…ous membranes, e.g., erythema multiforme, fixed drug eruption, lichen planus, cicatricial pemphigoid, and pemphigus vulgaris. In the case of diseases such as erythema multiforme and fixed drug eruption, blisters in the skin may form within the epider…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Focus of Infection?

…ose considered in some relation with neuropathy:            1, lichen planus; 2, lichen simplex (Vidal); 3, herpes simplex; 4, herpes zoster; 5, eczema (neurotic); 6, alopecia areata; 7, dermatitis herpetiformis; 8, scleroderma; 9, vitiligo. Group 3:…