What question did this study set out to answer?

To determine the characteristics and diagnosis of cutaneous lesions observed in the patient.

April 1, 2026Open Access

Catechism (Quiz 27)

Key Points

To determine the characteristics and diagnosis of cutaneous lesions observed in the patient.
Clinical examination of the patient's foot lesions
Biopsy performed on one of the lesions for analysis
Microscopic examination using hematoxylin and eosin staining
Identification of specific microscopic features from biopsy images
Requirement of 2-3 immunostains for accurate diagnosis
Final diagnosis to be established based on observed features

Abstract

Clinical History: An 80 year-old gentleman presented with multiple cutaneous lesions on the dorsal of his foot that he noticed over a period of time. On clinical exemption, there were multiple reddish coloured maculopapular lesions over the dorsal surface of his both feet. A biopsy was performed from one of the lesions over his left foot, for microscopic examination. Hematoxylin and eosin stained slide images provided. Questions: Q1: What are the microscopic features of the lesion seen in the images? Q2: What immunostains (2 to 3) would be required for a diagnosis? Q3: What is the diagnosis?Figure 1Figure 2

Catechism (Quiz 27)

Key Points

Abstract

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