Related Experiment Video
Updated: Dec 31, 2025

Combining Reflectance Confocal Microscopy with Optical Coherence Tomography for Noninvasive Diagnosis of Skin Cancers via Image Acquisition
Published on: August 18, 2022
Dermatoscopy of the Borst-Jadassohn phenomenon in hidroacanthoma simplex
Bruno de Castro E Souza1, Maria Cláudia Alves Luce2, Thais do Amaral Carneiro Cunha3
1Department of Dermatology, Hospital do Servidor Público Estadual, São Paulo, SP, Brazil.
Abstract:
The Borst-Jadassohn phenomenon is a morphological finding that consists of the presence of well-defined nests of cells located in the spiny stratum of an acanthotic epidermis. One of the neoplasms where this phenomenon is found is hidroacanthoma simplex. This neoplasm is considered the intraepidermal form of the eccrine poroma. Despite its benign nature, malignant transformations are reported. The present article reports a case of hidroacanthoma simplex and discusses the dermoscopy of this phenomenon.
Related Concept Videos
Papillary Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
Skin Cancer
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Reticular Dermis
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
Urologic Endoscopic Procedure: Cystoscopic Examination
Multipotency and Niche of Bulge Stem Cell
Accessory Structures of the Skin: Sebaceous Glands
These glands that produce the oils on the skin and hair are holocrine glands. The mature...

