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. 2021 Jul 8;22(14):7342. doi: 10.3390/ijms22147342

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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CD34+SCs/TCs around sweat glands, hair follicles and sebaceous glands. (A,B,E) Double immunochemistry for CD34 (brown) and αSMA (red). Hematoxylin counterstain. (C,F) Immunochemistry for CD34. Hematoxylin counterstain. (D) Ultrathin section. Uranyl acetate and lead citrate. (A,B) CD34+SCs/TCs (brown) are observed around the sweat glands at different magnifications. Myoepithelial cells are stained red. (C) Several layers of CD34+SCs (brown) around a hair follicle. (D) Ultrastructural image of telopodes of two telocytes (arrows) surrounding a hair follicle. (E) CD34+SCs/TCs (brown) around a sebaceous gland. (F) A cluster of very small, densely grouped CD34+ stromal cells with multiple intricate processes between the bulge region of a hair follicle and a sebaceous gland. Note CD34+SCs/TCs (arrows) interposed between the cluster of small CD34+ stromal cells and the hair epithelium. Bar; (A–C,F) 25 µm, (D) 3 µm, (E) 80 µm.