PubMed · 2294864
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L P Dehner. 1990. Whence the primitive neuroectodermal tumor?. https://pubmed.ncbi.nlm.nih.gov/2294864/
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Nasolabial flaps are frequently used for reconstruction of nasal and midfacial defects. The donor site and the quality of the skin provided are excellent, though reconstructive results are sometimes hampered by a dog-ear at the base of the flap. Properly designed rhomboid flaps generally rotate into position without a dog-ear. By combining the nasolabial donor site with the rhomboid design, the advantages of both methods of reconstruction can be combined. Nasolabial rhomboid flaps have been used successfully in seven patients. Reconstructions in all instances have been of high quality, and no revisions have been required after at least 6 months of follow-up. The nasolabial rhomboid flap is a refinement of existing techniques that can maximize the aesthetic quality of midfacial reconstructions.
Two cases of eccrine hidrocystoma, one of which is a "classic" Robinson type and the other a Smith type, were reported. The walls of both cysts consisted mainly of two layers of flat or low cuboidal epithelial cells with eosinophilic cytoplasm. Immunostaining for S-100 protein was negative in the cells of the cyst wall of the Robinson type and only weakly positive in the inner luminal layer of the Smith type. Electron microscopically, the Smith type showed double-layered cuboidal lining and cell membrane interdigitations as junctions of neighboring cells without any characteristics of the secretory segment of sweat glands, indicating substantial similarity to those of the intradermal portion of the eccrine sweat duct.
Individuals infected with the human immunodeficiency virus (HIV) have been reported to develop a number of malignant neoplasms. We recently treated an HIV patient who had acute monocytic leukaemia which was first evident in the skin. To our knowledge, this is the first report of a case of acute monocytic leukaemia occurring in a HIV-infected person.