This study reveals the need of individualized rehabilitation for these patients, and that the SIP and the SOC scale may serve as evaluation tools in a rehabilitation program.
In a retrospective study of 58 patients from all over Sweden, treated for small squamous cell carcinoma of the mobile tongue (T1N0M0), different prognostic factors were evaluated. A partial glossectomy was performed as primary treatment in all patients. The cancer recurred in 28 (38%) of 58 patients. One of 7 patients with only local recurrence, and 9 of 14 with recurrence in the neck died of their disease. The relative survival rate was 77%. Of the prognostic factors tested, tumor thickness was found to be the most significant. In patients with tumor thickness was found to be the most significant. In patients with tumor thickness exceeding 10 mm, recurrences occurred in 58% (P less than 0.0048), and 87% (P less than 0.0164) died of their cancer. This represents a statistically significant higher degree when compared with tumor thickness of less than 10 mm. Elective treatment of the neck nodes is recommended in epidermoid cancer of the mobile tongue when tumor thickness exceeds 10 mm, even in stage I tumors (i.e., the surface extension diameter is smaller than 20 mm at most).
Cryosectioned biofilm from three depths (0.5, 3.0 and 6.0 m) in a full-scale nitrifying trickling filter (NTF) were studied using fluorescence in situ hybridization (FISH). A large number of sections were used to determine how the biofilm thickness, structure and community composition varied with depth along the ammonium concentration gradient in the NTF, and how the ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) were distributed vertically within the biofilm. Both the biofilm thickness and relative biomass content of the biofilm decreased with depth, along with structural differences such as void size and surface roughness. Four AOB populations were found, with two Nitrosomonas oligotropha populations dominating at all depths. A smaller population of Nitrosomonas europaea was present only at 0.5 m, while a population of Nitrosomonas communis increased with depth. The two N. oligotropha populations showed different vertical distribution patterns within the biofilm, indicating different ecophysiologies even though they belong to the same AOB lineage. All NOB were identified as Nitrospira sp., and were generally more associated with the biofilm base than the surface-associated dominating AOB population. Additionally, a small population of anaerobic ammonia-oxidizers was found at 6.0 m, even though the biofilm was well aerated.
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