Acne Keloidalis
Figure 4.1 Acne keloidalis. Hyperpigmented follicular papules and pustules, along with hyperpigmented firm keloidal nodules, are present on the occipital scalp with associated areas of patchy alopecia Figure 4.2 Acne…
Dermatology
Tinea Capitis
Figure 12.1 Tinea capitis. A 2 × 3 cm oval patch of alopecia with short hair ends and black dots Clinical Differential Diagnosis The physical examination and clinical history is…
Pityriasis Alba
Figure 17.1 Ill-defined, hypopigmented slightly scaly patches on the right cheek Clinical Differential Diagnosis The findings were thought to be most consistent with pityriasis alba. The differential diagnosis for pityriasis…
Hidradenitis Suppurativa
Figure 6.1 Hidradenitis suppurativa. Tender erythematous nodules and sinus tracts with pustular drainage along the axilla The pathogenesis of hidradenitis suppurativa involves an interplay of genetics, hormones, infection, and social,…
Dissecting Cellulitis of the Scalp
Figure 5.1 Dissecting cellulitis. Scattered erythematous papules and pustules are noted on the vertex with alopecia and tufted hairs Clinical Differential Diagnosis The patient’s presentation is most consistent with dissecting…
27 Year Old Black Male with a Widespread Recurrent Rash Which Occasionally Forms Vesicles
Figure 18.1 Syphilis, left lower arm Figure 18.2 Syphilis, small dark, vesicular lesions on the median of the patient’s left leg Figure 18.3 Syphilis, hyperpigmented patches found throughout the lower…
56 Year Old Central American Male Immigrant with a Persistent Cough and Chest Pain
Figure 27.1 H&E 100×, Coccidiodomycosis, inflammation with scattered multinucleated giant cells Coccidioidomycosis does not affect all ethnicities equally. Those of African, Filipino, Mexican or Native American heritage are more likely…
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…
