Clinical photography of the back using a high‑resolution digital camera under standard white‑light illumination was obtained to document cutaneous skin findings. The view is a posterior trunk (dorsal back) with bilateral, well‑circumscribed hypopigmented macules and patches showing fine surface scaling. Lesions are diffuse across the mid to lower back with mild contrast against surrounding tan skin, consistent with pityriasis versicolor (tinea versicolor). The textural appearance is smooth, with less erythema than inflammatory dermatoses; scaling is subtle and best appreciated on oblique lighting. Pityriasis versicolor is a superficial fungal infection caused by Malassezia species that disrupt epidermal pigmentation, producing hypo‑ or hyperpigmented macules and mild pruritus in some patients. The condition commonly affects the trunk and proximal limbs in warm, humid climates and may be asymptomatic. In the differential diagnosis, vitiligo, pityriasis alba, and postinflammatory hypopigmentation are considerations. If tested, KOH preparation or fungal culture can reveal yeast with short hyphae (“spaghetti and meatballs”) compatible with Malassezia species. Management typically involves topical antifungals; extensive cases may require oral therapy. This photograph serves educational and reference purposes for pattern recognition, trunk involvement, and characterization of pigmented skin lesions in dermatology practice and training.

Clinical photograph of in vivo human forearm skin showing hypopigmented, confluent patches compatible with pityriasis versicolor (tinea versicolor). The image demonstrates localized involvement of the volar forearm with pale, irregularly shaped macules that coalesce into larger hypopigmented patches. The lesions display subtle surface scaling and well-defined but variable borders; surrounding skin is darker, giving a contrast typical for this condition. The distribution is on sun-exposed or humid skin regions and may appear more prominent after tanning. Pathophysiology involves superficial Malassezia yeast colonization of the stratum corneum with production of acids that disrupt melanin synthesis, leading to pigmentary heterogeneity. Clinically, pityriasis versicolor presents as nonpruritic hypo- or hyperpigmented patches that fluoresce under Wood's lamp. Differential diagnoses include vitiligo, postinflammatory hypopigmentation, and pityriasis alba; however, tinea versicolor generally preserves skin texture and shows minimal scale on closer inspection. Diagnostic confirmation is often via KOH preparation revealing the spaghetti-and-meatballs pattern of yeast and hyphae. Management is antifungal (topical azoles, selenium sulfide, or oral therapy for extensive disease). This image is valuable for dermatology education, pigmentary disorder assessment, and search-indexing for clinical skin disease repositories, aiding learners in recognition and differential diagnosis of superficial fungal hypopigmentation.

The image depicts a clinical photograph of axillary and proximal chest skin showing pigmented follicular lesions consistent with pityriasis versicolor. Imaging modality is clinical photography using a standard digital color camera to document cutaneous involvement. Visual features include multiple small brown, slightly scaly papules and patches centered on hair follicles, with fine surface scaling and patchy distribution. Lesions appear hypo- or hyperpigmented relative to adjacent skin, with preserved contour and no overt inflammation. The follicular localization suggests involvement of the follicular ostia and sebaceous-rich zones of the upper trunk. Histopathology (if sampled) would typically reveal Malassezia yeast and hyphae within the stratum corneum; KOH preparation may demonstrate the classic spaghetti-and-meatballs pattern. Clinically, pityriasis versicolor is a superficial fungal infection that can mimic other pigmentary disorders such as seborrheic dermatitis or vitiligo; differential diagnoses include post-inflammatory hyperpigmentation and tinea corporis. This image is valuable for dermatology education, telemedicine, and patient counseling, and supports planning of antifungal therapy (azoles, selenium sulfide) with attention to recurrence in hot, humid environments. For educational indexing, include commonly used synonyms such as tinea versicolor, Malassezia infection, pityriasis versicolor; this enhances recognition in dermatology databases, textbooks, and image banks used by clinicians, students, and researchers.