| Jadassohn's nevus | Congenital papillary acanthosis of the epidermis, with hyperplasia of sebaceous glands developing at puberty and presence of apocrine glands in non-apocrine areas of the skin (commonly the scalp). A variety of epithelial tumours may arise from a nevus sebaceus in adult life, most commonly basal cell carcinoma. Synonym: Jadassohn's nevus, organoid nevus. (05 Mar 2000) |
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| Jadassohn-Tieche nevus | A dark blue or blue-black nevus covered by smooth skin and formed by heavily pigmented spindle-shaped or dendritic melanocytes in the reticular dermis. Synonym: Jadassohn-Tieche nevus. (05 Mar 2000) |
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| Borst-Jadassohn type intraepidermal epithelioma | <tumour> Precancerous lesions clinically suggestive of actinic or seborrheic keratosis, with nests of immature or abnormal keratinocytes within the epidermis. (05 Mar 2000) |
| Jadassohn, Josef | <person> German dermatologist in Switzerland, 1863-1936; introduced the patch test for contact dermatitis. See: Jadassohn's nevus, Borst-Jadassohn type intraepidermal epithelioma, Jadassohn-Pellizzari anetoderma, Jadassohn-Tieche nevus, Franceschetti-Jadassohn syndrome, Jadassohn-Lewandowski syndrome. (05 Mar 2000) |
| Jadassohn-Lewandowski syndrome | A syndrome of ectodermal dysplasia of abnormal thickness and elevation of nail plates with palmar and plantar hyperkeratosis; the tongue is whitish and glazed owing to papillary atrophy; autosomal dominant inheritance. Synonym: Jadassohn-Lewandowski syndrome. (05 Mar 2000) |
| Jadassohn-Pellizzari anetoderma | Cutaneous atrophy preceded by erythematous or urticarial lesions of the trunk and upper portions of the extremities, and enlarging to 2-3 cm before undergoing involution. (05 Mar 2000) |
| Franceschetti-Jadassohn syndrome | <syndrome> Reticular skin pigmentation, diminished sweating, hypodontia, and hyperkeratosis of the palms and soles; may be confused with incontinentia pigmenti but is as common in males as in females; autosomal dominant inheritance. Synonym: Franceschetti-Jadassohn syndrome. (05 Mar 2000) |
| acquired nevus | A melanocytic nevus that is not visible at birth, but appears in childhood or adult life. (05 Mar 2000) |
| balloon cell nevus | A nevus in which many of the cells are large, with clear cytoplasm. (05 Mar 2000) |
| basal cell nevus | A hereditary disease noted in infancy or adolescence, characterised by lesions of the eyelids, nose, cheeks, neck, and axillae, appearing as uneroded flesh-coloured papules, some becoming pedunculated, and histologically indistinguishable from basal cell epithelioma; also noted are punctate keratotic lesions of the palms and soles; the lesions usually remain benign, but in some cases ulceration and invasion occur and are evidence of malignant change; autosomal dominant inheritance. (05 Mar 2000) |
| basal cell nevus syndrome | <syndrome> An inherited group of defects which involve abnormalities of the skin, eyes, nervous system, endocrine, glands and bones. The condition is characterised by an unusual facial appearance and a predisposition for skin cancer. (27 Sep 1997) |
| bathing trunk nevus | These large pigmented (often hairy) congenital nevi are important because of their increased risk (10 to 15%) of conversion into malignant melanoma. A biopsy can confirm if cells have turned malignant. Any change in a pre-existing nevus should prompt a physician evaluation. (27 Sep 1997) |
| Becker's nevus | A nevus first seen as an irregular pigmentation of the shoulders, upper chest, or scapular area, gradually enlarging irregularly and becoming thickened and hairy. Synonym: pigmented hair epidermal nevus. (05 Mar 2000) |
| blue nevus | A dark blue or blue-black nevus covered by smooth skin and formed by heavily pigmented spindle-shaped or dendritic melanocytes in the reticular dermis. Synonym: Jadassohn-Tieche nevus. (05 Mar 2000) |
| blue rubber bleb nevus syndrome | <radiology> Bean syndrome, sporadic (some autosomal dominant), rubbery, raised blue-black skin nevi (cavernous haemangiomata, 0.1 - 5 cm), GI mucosal haemangiomata, bowel: polypoid filling defects of varying sizes, visceral haemangiomata (by angio) associated with: leukaemia, medulloblastoma, hypernephroma, Mafucci syndrome More info: blue rubber bleb nevus syndrome (12 Dec 1998) |
| capillary nevus | Capillary haemangioma of the skin. (05 Mar 2000) |