亲毛囊性蕈样肉芽肿伴嗜酸粒细胞增多一例

患者男，69岁。3年来，头、躯干和四肢出现散在红斑、毛囊性丘疹及痤疮样皮损（如粟丘疹、囊肿等）和脱发，病程中伴外周血嗜酸粒细胞增多。皮损组织病理检查示真皮内灶性慢性炎细胞浸润伴毛细血管增生，毛囊周围慢性炎细胞浸润伴血管增生，伴少许嗜酸粒细胞，考虑为毛囊炎，予抗组胺药和抗生素治疗后皮损炎症消退，瘙痒减轻。3个月后，枕部出现斑块伴脱发，组织病理检查示真皮内密集淋巴样细胞、嗜酸粒细胞浸润，毛囊周围大量淋巴样细胞浸润伴较多嗜酸粒细胞，可见不典型淋巴细胞，部分侵入毛囊，毛囊上皮黏液样变性。阿新蓝染色阳性。免疫组化染色：CD20、CD79a、EB病毒（EBV）、CD56、磷酸葡萄糖变位酶-1（PGM-1）、髓过氧化物酶（MPO）、CD7、抗角蛋白单克隆抗体AE1/AE3均阴性，异形细胞CD3、CD4、CD5、CD2、CD43、泛素羧基末端水解酶-L1（UCHL-1）均阳性。T细胞受体基因重排结果为阴性。诊断：亲毛囊性蕈样肉芽肿。予光化学疗法（PUVA）联合阿维A治疗，仍有新发皮损，目前患者在随访中。

Folliculotropic mycosis fungoides complicated by eosinophilia: a case report

A 69-year-old man presented with a 3-year history of scattered erythematous patches, perifollicular papules, acneiform lesions (such as milia, cysts) on the head, trunk and limbs as well as alopecia and peripheral eosinophilia. Histopathological examination revealed chronic focal dermal and perifollicular inflammatory infiltration with vascular proliferation and presence of a small number of eosinophils. He was initially diagnosed with folliculitis, and treated with antihistamines and antibiotics. Thereafter, lesional inflammation and pruritus were attenuated. However, plaques and alopecia developed in the occipital area 3 months later. The second histopathology of biopsy specimens revealed a dense dermal infiltrate of lymphoid cells and eosinophils, perifollicular infiltrate with numerous lymphoid cells, eosinophils and atypical lymphocytes migrating into hair follicles. Alcian blue stain showed epidermal mucinosis in follicles. Immunohistochemical examination showed positive staining of atypical cells for CD3, CD4, CD5, CD2, CD43 and ubiquitin carboxyl-terminal esterase L1 (UCHL1), but negative staining for CD20, CD79a, Epstein-barr virus, CD56, phosphoglucomutase-1, myeloperoxidase, CD7, or AE1 and AE3 monoclonal anti-keratin antibodies. T-cell receptor gene rearrangement was undetected. He was diagnosed with folliculotropic mycosis fungoides. Novel skin lesions still emerged after treatment with photochemotherapy (PUVA) plus acitretin. Follow up of the patient still continued.