46 Year Old Female with a Rapidly Spreading Rash
Figure 23.1 Tinea corporis (one hand, two feet sign), the palm of the hand and both the bottom of the feet are scaly Figure 23.2 Tinea corporis, multiple round/oval rash…
53 Year Old Female with Multiple Areas of Erythema on Scalp
Figure 33.1 Head lice Clinical Differential Diagnosis Seborrheic dermatitis Insect bite Pediculosis (Lice) Eczema Psoriasis Piedra Histopathology Multiple strands of gray hair were removed and submitted for microscopic evaluation. Examination…
50 Year Old Male with Dark Red Rash Inside Mouth and Left Axillae
Figure 29.1 Candidiasis, whitish material attached to the tongue (thrush) Figure 29.2 Candidiasis, beefy red plaque at the axillae Clinical Differential Diagnosis (Skin Fold Rash) Intertrigo Tinea Psoriasis Erythrasma Seborrheic…
46 Year Old Female with Multiple Slightly Eroded Reddish Papules on Her Arm
Figure 15.1 Mycobacterium tuberculosis Figure 15.2 H&E 40× discrete subcutaneous nodule Figure 15.3 H&E 100×, outer wall consists of lymphocytes and histiocytes while the center is necrotic Figure 15.4 H&E…
9 Year Old Black Female with Multiple, Small Round, Firm Papules
Figure 9.1 Verruca vulgaris Figure 9.2 Verruca vulgaris Clinical Differential Diagnosis Epidermal nevus Actinic keratosis Seborrheic keratosis Verruca vulgaris Histopathology The shave biopsy of the left knee was performed and…
48 Year Old Hiv + Male with Multiple Papules and Nodules on Arms
Figure 19.1 H&E 40×, Histoplasmosis, most of the entire punch biopsy specimen contains dense inflammation Figure 19.2 H&E 100×, Histoplasmosis, confluent granulomas with scattered giant cells (arrow) Figure 19.3 H&E…
56 Year Old with a Widespread, Slightly Itchy Rash with Discoloration
Figure 22.1 Tinea versicolor, hypopigmented round-oval flat lesions Clinical Differential Diagnosis (Pigmentation changes with minimal erythema) Vitiligo Post inflammatory hypopigmentation Idiopathic guttate hypomelanosis Tinea versicolor Histopathology Sections showed minimal inflammation…
67 Year Old with Slight Erythema of the Nose
Figure 31.1 Demodex mite. A circular lesion marked by ink dots was biopsied Clinical Differential Diagnosis Fibrous papule Basal cell carcinoma Sebaceous hyperplasia Cyst Demodex folliculitis Histopathology Sections showed a…
46 Year Old Black Male with Multiple Growths on Penis
Figure 1.1 Bowenoid Papillosis arising in Condyloma acuminate Clinical Differential Diagnosis (Multiple red-brown, pigmented papules or plaque on genital skin) Junctional Nevus Seborrheic keratosis Psoriasis Bowenoid papulosis arising adjacent to…
95 Year Old White Female with a Reddish, Nodule on Temple
Figure 2.1 Merkel cell carcinoma Clinical Differential Diagnosis (Raised erythematous lesion on sun exposed skin) Squamous cell carcinoma Actinic keratosis Merkel cell carcinoma Lymphoma Angiosarcoma Metastasis Histopathology The lesion on…
