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[Erosive pustulosis of the scalp: 3 cases].

BACKGROUND: Erosive pustulosis of the scalp is a rare entity of unknown etiology mainly affecting elderly people. It is often triggered by local trauma and features chronic pustules of the scalp evolving toward scarring alopecia. Its treatment is not yet codified. OBSERVATIONS: Two patients (66 and 87 years old) presented with crusted and erosive pustules of the scalp following surgical removal of actinic keratosis and total skin graft. In a third patient, similar lesions appeared after hair grafting. Clinical features were consistent with the clinical pattern of erosive pustulosis of the scalp. In all three patients, oral zinc gluconate in combination with topical steroids associated resulted in significant improvement. CONCLUSION: An association of topical steroids and oral zinc gluconate might be an interesting therapeutic option in this chronic, often disabling affection.

Administration, Topical↗

Scalp necrosis with giant cell arteritis.

OBJECTIVE: Giant cell arteritis (GCA) often presents with devastating visual loss in the elderly, yet early diagnosis and treatment can prevent visual loss. The authors report two cases of GCA in which scalp necrosis, a rare finding not reported previously in the ophthalmic literature, played an important role in diagnosis. DESIGN: Observational case reports and literature review. PARTICIPANTS: Two patients with GCA had scalp necrosis. INTERVENTION: Intravenous steroid administration was performed. MAIN OUTCOME MEASURE: Vision and healing of scalp necrosis were measured. RESULTS: One patient had scalp necrosis that was diagnosed incorrectly preceding visual loss. Another patient had visual loss in one eye diagnosed as nonarteritic anterior ischemic optic neuropathy. He had scalp necrosis develop 2 weeks later, leading to the correct diagnosis of GCA. There are 21 previously reported cases of scalp necrosis with GCA, none in the ophthalmic literature, most of which were undiagnosed until the onset of visual loss. In addition, a higher rate of visual loss is seen in GCA with scalp necrosis. CONCLUSIONS: Scalp necrosis is a valuable sign that frequently is misdiagnosed until visual loss occurs. In addition, it may indicate a more severe vasculitis. This finding should be added to the list of signs evaluated in patients for whom GCA is in the differential diagnosis.

Aged↗

Tumors arising in nevus sebaceus: A study of 596 cases.

BACKGROUND: Prophylactic surgical excision of nevus sebaceus (NS) during childhood is often recommended because various neoplasms can occur on NS. The proportion of malignant tumors occurring on NS is highly variable among the published series, and there are controversies on the nature of these neoplasms because many of the previously described basal cell carcinomas could actually be trichoblastomas, which are benign follicular tumors. OBJECTIVE: We retrospectively analyzed all cases of NS of our collection, excised during the period from 1932 through 1998, and recorded all associated epithelial and nonepithelial changes. We especially differentiated basal cell carcinomas from trichoblastomas by silhouette analysis and examination of the stroma. These findings were analyzed according to gender, age, and localization. METHODS: Microscopic analysis of NS by two examiners was performed independently of clinical data. RESULTS: A total of 596 cases were included from 290 females and 306 males, mean age 25.4 years (range, 1 month to 87 years); 232 were excised in children younger than 16 years. NSs were located on the scalp in 49.8% of cases. Basal cell carcinomas were found in 5 cases (0.8%, mean age 39.3 years) and benign tumors in 81 cases (13.6%, mean age 46.3 years). Syringocystadenoma papilliferum (n = 30, 15 males, 15 females) and trichoblastoma (n = 28, 7 males, 21 females) were the most frequent benign tumors. NS with associated tumors were located on the scalp in 79% of cases. Only 4 benign tumors (1.7%) and 2 warts were observed in patients younger than 16 years. Various types of epithelial hyperplasia were noted that could not be considered neoplasms, as well as epidermal and apocrine cysts. CONCLUSION: The rate of malignant tumors arising on NS was very low and we did not observe such cases in children, who had associated benign tumors in only 1.7% of cases. Benign neoplasms were common and most of them occurred on the scalp; this was not a bias resulting from a longer duration before surgery. Trichoblastoma and not basal cell carcinoma was the most frequent follicular tumor associated with NS and showed a striking female predominance. Most trichoblastomas had previously been misdiagnosed but could actually be easily recognized by typical histologic features. Because most tumors occurred in adults older than 40 years, our study suggests that prophylactic surgery in young children is of uncertain benefit. Clinical follow-up is probably sufficient, and even those cases with clinical changes often proved to be benign tumors or warts.

Adolescent↗

Subcutaneous nodules of the scalp: preoperative management.

The differential diagnosis of subcutaneous lesions of the scalp is extensive and includes many tumors with intracranial and intraosseous extension. The vast majority of lesions seen by the dermatologist will be benign. However, certain lesional characteristics increase the likelihood of a serious disorder and these must be evaluated preoperatively. We review the important features of subcutaneous scalp lesions and suggest a systematic approach to diagnosis based on patient age, lesion morphology, location, and radiographic findings.

Adult↗

Subcutaneous necrobiotic granulomas of the scalp.

Nine biopsy specimens taken from the scalps of five children and four adults with subcutaneous necrobiotic granulomas were reviewed. This histopathologic features were similar in both groups. Four of the five children presented clinically with multiple, firm, bound-down subcutaneous nodules limited to the scalp but no associated systemic disease. In addition to the scalp nodules, one child had typical cutaneous lesions of granuloma annulare over the acral areas. Two of the adult patients, however, had severe rheumatoid arthritis with multiple rheumatoid nodules on the arms in addition to the scalp nodules; one of them had rheumatoid vasculitis. Another adult patient had allergic granulomatosis,and one had granuloma annulare lesions involving the scalp, face, and left ankle. Excision biopsy specimens should be taken in all patients--both children and adults--with multiple, deep, bound-down nodules of the scalp. If the specimen shows subcutaneous necrobiotic granuloma, probably no treatment is indicated in children because, in our experience, there is no associated systemic disease. However, in the adult patient with similar scalp lesions, the possibility of systemic disease should be explored.

Adult↗