{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,29]],"date-time":"2025-10-29T06:07:55Z","timestamp":1761718075238,"version":"build-2065373602"},"reference-count":27,"publisher":"BMJ","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Med Genet"],"published-print":{"date-parts":[[1989,3]]},"abstract":"<jats:p>Disturbed spermatogenesis and azoospermia are reported in a man with a deleted Y chromosome. The anomalous Y chromosome appears in the karyotype as a small metacentric marker. In situ hybridisation using three different Y specific DNA probes shows that deletion at Yq11 has resulted in loss of all distal heterochromatin. The sterility of the patient indicates loss also of the azoospermia factor (AZF) located at the Yq distal euchromatic\/heterochromatic interface. Microspread and air dried meiotic preparations show a severe impairment of spermatogenesis but rare cells are seen to be progressing to the late prophase stage. The testicular histology shows most of the seminiferous tubules to be completely hyalinised. The father and a fertile brother of the proband show a satellited Y chromosome (Yqs) in their karyotypes. The case appears to be the first of its kind reported in which a father with a satellited Y chromosome has produced a son carrying a different Y chromosome anomaly. The possible derivation of the one from the other is discussed.<\/jats:p>","DOI":"10.1136\/jmg.26.3.145","type":"journal-article","created":{"date-parts":[[2008,11,10]],"date-time":"2008-11-10T15:11:11Z","timestamp":1226329871000},"page":"145-153","source":"Crossref","is-referenced-by-count":46,"title":["Deleted Yq in the sterile son of a man with a satellited Y chromosome (Yqs)."],"prefix":"10.1136","volume":"26","author":[{"given":"A C","family":"Chandley","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J R","family":"Gosden","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T B","family":"Hargreave","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G","family":"Spowart","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R M","family":"Speed","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S","family":"McBeath","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1989,3,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1007\/BF00278879","article-title":"Localization of factors controlling spermatogenesis in the nonfluorescent portion of the human Y chromosome long arm","volume":"34","author":"Tiepolo, L, Zuffardi 0","year":"1976","unstructured":"Tiepolo L, Zuffardi 0. 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