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Surgical pathology of skeletal coccidioidomycosis: a clinical and histopathologic analysis of 25 cases.

骨骼球孢子菌病的外科病理学研究:25例临床和组织病理特征分析

Ricciotti RW,Shekhel TA,Blair JE,Colby TV,Sobonya RE,Larsen BT

Abstract

Skeletal coccidioidomycosis is a rare complication of pulmonary coccidioidomycosis that remains incompletely characterized, and its histopathologic features have not been systematically evaluated. All skeletal coccidioidal infections (2000 to 2012) were retrieved from the University of Arizona and Mayo Clinic in Arizona pathology archives. Clinical history and histologic features were reviewed. Among 25 patients (median age 40 y; 17 men), infections involved bones (2 cases), joints (6), or both (17), usually in the distal extremities (68%), especially the wrist (32%). History included previously documented coccidioidomycosis (13), autoimmune disease (8), diabetes (6), malignancy (4), and iatrogenic immunosuppression (10). Common symptoms (median 3 mo) included pain/arthralgia (21) and swelling (10). Cultures and serology were positive in 15 of 17 (88%) and 19 of 22 patients (86%), respectively. Treatment included surgical debridement(s) and chronic antifungal medication(s). Histologic review showed granulomas in all cases, ranging from poorly to well formed, with or without necrosis. Spherule density varied widely (mean 4.8/HPF; range <0.1 to 13.5/HPF). Composition of inflammatory infiltrates, degree of necrosis, and extent of fibrosis did not significantly differ between immunocompetent and immunocompromised patients. Eosinophils were only seen in one third of cases; when present, eosinophils were almost always rare. 10 patients experienced recurrent infection, 8 of whom were immunocompromised; the remaining patients recovered. In conclusion, distal extremities are the most common sites of skeletal coccidioidomycosis encountered by surgical pathologists. This condition is strongly associated with autoimmune disorders and immunosuppression. Spherules are sometimes rare, and multiple modalities including serology, culture, and histology may be required for diagnosis.

摘要

骨骼球孢子菌病是特征并不完整的肺球孢子菌病罕见并发症,并未系统评估过其组织病理学特征。
复习亚利桑那州大学和梅奥诊所(2000-2012)的所有骨骼球孢子菌病病例,并审查了临床病史和病理特征。25名患者中(中位年龄40岁;男性17例),感染累及骨2例,关节6例,二者均有者17例,通常是在四肢远端(68%),尤其是手腕部(32%)。病史方面以前记录有球孢子菌病者13例,自体免疫疾病8例,糖尿病6例,恶性肿瘤4例,医源性免疫抑制10例。
常见的症状(中位时间3个月)包括疼痛/关节痛(21例)和关节膨大(10例)。细菌培养和血清学阳性者分别为15/17例(88%)、19/22例(86%)。治疗包括手术清创和长期抗真菌的药物。
病理回顾发现所有病例都存在肉芽肿,境界不易,从不清到极为清楚均有,伴或不伴坏死。孢子的密度相差很大(平均4.8个/HPF,自<0.1?13.5/HPF不等)。炎性浸成分、坏死程度和纤维化程度在免疫正常和免疫低下患者之间没有显着不同。嗜酸性粒细胞仅见于三分之一的病例;如果有,嗜酸性粒细胞也几乎都是罕见的。10例患者发生复发性感染,其中8例患者为免疫功能低下;其余患者均痊愈。
总之,四肢远端是外科病理学家遇到骨骼球孢子菌病的最常见发生部位,这与自身免疫性疾病和免疫抑制显着相关。孢子有时罕见,并且可能需要包括血清学、细菌培养和组织学等多学科联合进行诊断。

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