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Melanonychia associated with subungual follicular inclusions: report of three cases. 2020

Marina Câmara de Oliveira, and Carlos Baptista Barcaui, and Elisa de Oliveira Barcaui, and Juan Piñeiro-Maceira
Dermatology Service, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Electronic address: marina__co@hotmail.com.

Melanonychia is the change in the coloration of the nail plate resulting from the deposition of melanin. Among its causes are melanocytic hyperplasia, melanocytic activation and nail melanoma. Subungual follicular inclusions are histological findings of unknown etiology, possibly related to trauma. We present three cases of melanonychia of different etiologies with subungual follicular inclusions, an association that has not been well described and with an indefinite pathogenesis.

UI MeSH Term Description Entries
D008297 Male Males
D008548 Melanosis Disorders of increased melanin pigmentation that develop without preceding inflammatory disease. Chloasma,Freckles,Melanism,Melasma,Chloasmas,Freckle,Melanoses,Melasmas
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009260 Nail Diseases Diseases of the nail plate and tissues surrounding it. The concept is limited to primates. Disease, Nail,Diseases, Nail,Nail Disease
D009262 Nails The thin, horny plates that cover the dorsal surfaces of the distal phalanges of the fingers and toes of primates. Fingernails,Toenails,Fingernail,Nail,Toenail
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D014463 Ultrasonography The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz. Echography,Echotomography,Echotomography, Computer,Sonography, Medical,Tomography, Ultrasonic,Ultrasonic Diagnosis,Ultrasonic Imaging,Ultrasonographic Imaging,Computer Echotomography,Diagnosis, Ultrasonic,Diagnostic Ultrasound,Ultrasonic Tomography,Ultrasound Imaging,Diagnoses, Ultrasonic,Diagnostic Ultrasounds,Imaging, Ultrasonic,Imaging, Ultrasonographic,Imaging, Ultrasound,Imagings, Ultrasonographic,Imagings, Ultrasound,Medical Sonography,Ultrasonic Diagnoses,Ultrasonographic Imagings,Ultrasound, Diagnostic,Ultrasounds, Diagnostic
D046169 Dermoscopy A noninvasive technique that enables direct microscopic examination of the surface and architecture of the SKIN. Dermatoscopy,Epiluminescence Microscopy,Skin Surface Microscopy,Dermatoscopies,Dermoscopies,Epiluminescence Microscopies,Microscopies, Epiluminescence,Microscopies, Skin Surface,Microscopy, Epiluminescence,Microscopy, Skin Surface,Skin Surface Microscopies,Surface Microscopies, Skin,Surface Microscopy, Skin
D018859 Hair Follicle A tube-like invagination of the EPIDERMIS from which the hair shaft develops and into which SEBACEOUS GLANDS open. The hair follicle is lined by a cellular inner and outer root sheath of epidermal origin and is invested with a fibrous sheath derived from the dermis. (Stedman, 26th ed) Follicles of very long hairs extend into the subcutaneous layer of tissue under the SKIN. Follicle, Hair,Follicles, Hair,Hair Follicles

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