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Biomedical subjects

Alan S Boyd

Publications and source records attributed to Alan S Boyd.

8 recordsLinked to original sources

Protothecosis.

Intravenous amphotericin B remains the most effective drug for eradicating Prototheca infections. It should be used as a first-line agent in cases of disseminated disease and in patients with severe underlying illness or with immunosuppression or immunocompromise. Azole antifungals and surgery should be reserved for patients with more localized disease. Itraconazole appears to be the most effective agent of this drug class, and it should be administered at 200 mg/day for 2 months. Surgical excision should be considered as a first-line therapy in patients who present with olecranon bursal infections.

Amphotericin B↗

Auricular ossificans (ectopic ossification of the auricle).

The petrified auricle is an unusual clinical entity in which the ear becomes partially or totally rigid, which may result from local trauma, inflammation, or systemic diseases. This process is most commonly secondary to ectopic calcification, but rarely ossification is responsible. Severe hypothermia (frostbite) is the most common cause of auricular ossificans. Only 9 cases of histologically proven ossification of the ear have been reported in the English-language literature. Because of its rarity, there is a paucity of articles addressing its treatment. We report a case of unilateral auricular ossificans believed to be secondary to cold injury. Ectopic ossification was detected on both radiologic and histologic examination. The previously reported cases are reviewed and possible causative factors are discussed.

Aged↗

Basal cell carcinoma in young women: an evaluation of the association of tanning bed use and smoking.

Basal cell carcinomas (BCCs) typically occur in middle-aged to elderly patients but less commonly in younger ones. In our experience, most BCCs seen in patients younger than 40 years are found in women. We evaluated 30 women with biopsy-proven BCC and 30 control patients matched for sex, age, and skin type to determine potential risk factors for this population. Tanning bed visits, pack-years of cigarette smoking, recreational sun exposure, number of blistering sunburns, and use of sunscreens were determined for both groups. Among patients with a BCC, the histologic type of tumor, site of involvement, method of treatment, follow-up period, incidence of recurrence, and presence of actinic keratoses were also evaluated. Patients with a BCC had a statistically greater number of pack years of smoking (P =.045), and a greater percentage of these women had experienced blistering sunburns (P =.028). Although women with a BCC had, on average, almost twice as many tanning salon visits (152.2 vs 83.1), this was not statistically significant. Sunscreen use and amount of recreational ultraviolet light exposure were essentially equal between the two groups. Young women with a BCC are more likely to have a past or current history of cigarette smoking and blistering sunburns. Repeated exposure to tanning beds may also be a contributory factor.

Adolescent↗