What's the difference between sphenoid and spheroid?
Sphenoid
Definition:
(a.) Wedge-shaped; as, a sphenoid crystal.
(a.) Of or pertaining to the sphenoid bone.
(n.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.
(n.) The sphenoid bone.
Example Sentences:
(1) The resection included the skin, globe, sphenoid wings, and orbitofrontal bone.
(2) In Patient 2, rhinorrhoea and presumably entry of infection was facilitated by unplugging of a defect in the wall of the sphenoid sinus by bromocriptine-induced shrinkage of the pituitary adenoma.
(3) This difference, however, did not influence the detection of rhythmical ictal activity in cheek and sphenoidal montages in our study, nor the assignment of side, site or time of seizure onset by unbiased readers.
(4) The other structures or regions that were involved, in decreasing order of frequency, were the sphenoid sinus (26.7%), nasal fossa (21.8%), and ethmoid sinus (18.3%).
(5) A case of isolated sphenoidal tumor localization in a child without any endocrinological disorder and revealing an histiocytosis X is reported.
(6) Except when the sphenoid sinus or the middle cranial fossa is involved, it is advisable to set the height of the upper margin of the lateral facial field at a level no higher than the diaphragma sellae.
(7) This paper reviews 14 patients presenting with acute sphenoid sinusitis between 1978 and 1987.
(8) The operative method involves removal of portions of the orbital rim, orbital roof, and sphenoid bone.
(9) the sphenoid, ethmoid, and occipital bones) and to abnormal spatial relationships between the cribriform plate and the crista galli, resulting in a positional disarrangement of the points of basal attachment of the dura matter.
(10) Canal structures, remnants of the craniopharyngeal canal, were observed in specimens showing bilateral centers of ossification in the sphenoid corpus.
(11) Inflammatory disease of the posterior sinuses (sphenoid and posterior ethmoid cells) may not clinically be apparent and might be overlooked.
(12) A new staging system according to the regions involved was used; 31 patients in whom the tumour was limited to the nasopharynx (Stage I) and those with superior spread into the ethmoid or sphenoid sinuses (Stage IIA) had their tumours removed by a transpalatal route, alone or in combination with other approaches.
(13) The common sites of extra-nasopharyngeal extension detected by CT scan are: parapharyngeal space, intracranial invasion, sphenoidal sinus, orbit, ethmoidal sinus, maxillary antrum, oropharynx and the nasal cavity.
(14) A soft reddish brown mass was found in the sphenoid sinus and the bilateral cavernous sinus extending from the sella turcica.
(15) The arteriogram demonstrated supply to the tumor from numerous hypertrophied branches of the cavernous portion of the internal carotid artery and a dense tumor stain within the sphenoid sinus.
(16) Anatomic variations of the sella turcica and sphenoid sinus may complicate surgical intervention in the region of the sella turcica.
(17) A case of primary chondromyxoid fibroma of the petrous and sphenoid bones extending into the posterior clinoid process, sella, and cavernous sinus in a 26-year-old man is reported.
(18) It provides a simple, reliable, rapid technique for exposing the septum and the floor of the nose with excellent exposure to the sphenoid sinus and pituitary gland.
(19) However, the described surgical technique seems to be a good alternative for fistulas to the sphenoidal sinus and should be included in our surgical armamentarium.
(20) The maxillary sinus, the sphenoid sinus and the ethmoid cells were opened on both sides during ten resections of the skull base.
Spheroid
Definition:
(n.) A body or figure approaching to a sphere, but not perfectly spherical; esp., a solid generated by the revolution of an ellipse about one of its axes.
Example Sentences:
(1) Microelectrodes were used to measure the oxygen tension (PO2) profile within individual spheroids at different stages of growth.
(2) Aside from typical nuclear spheroids, irregularly shaped nuclei were frequently seen, associated with increased nuclear folds, transitional stages between nuclear folds and nuclear spheroids were also present.
(3) The nuclei in these typical onocytes appeared oval or spheroid.
(4) The tumor cells of these melanomas are characterized by spheroidal melanosomes and containing pheomelanins.
(5) This is a clinical, histopathological and electron microscopical study on the spheroidal degeneration of the cornea by means of 48 histologically verified cases.
(6) Our results show the feasibility of back-extrapolating multicellular tumour spheroid growth curves to obtain survival estimates that can be applied to establish sublethal damage repair capacity.
(7) HCG, E2 and P4 were secreted into the culture medium throughout the entire culture period, in proportion to spheroid size.
(8) In addition, it was observed that the higher resistance of the V79 spheroid cells than the monolayers to gamma-irradiation is not diminished in the pion peak, suggesting that the underlying phenomenon of intercellular communication influences cell survival even after high-LET irradiation.
(9) Under the 3-dimensional geometry of the spheroid system, there was, however, generally a more extensive ECM.
(10) The spheroids grew exponentially with a volume-doubling time of approximately 24 h up to a diameter of approximately 580 microns and then the growth rate tapered off, more for spheroids grown at the low than at the high oxygen tension.
(11) The cytotoxicity of doxorubicin (DX), 4'-O-methyl-DX (MET-DX), 4'-deoxy DX (DEO-DX), 4'-deoxy-4'-iodo-DX (IODO-DX), daunorubicin (DNR)and 4-demethoxy-DNR (DM-DNR) on LoVo cells cultured as a monolayer (in exponential and stationary phases of growth) and as spheroids, are evaluated following 1-h exposure to the drugs.
(12) Under conditions of severe hypoxia (< 0.01% O2), 2 h of pretreatment or 18 h of simultaneous treatment with SR 4233 did not significantly enhance the effectiveness of 131I-NR-LU-10 in spheroids.
(13) The reported prevalence and severity of primary spheroidal degeneration in Labrador and nothern Newfoundland is based on a survey of 929 patients.
(14) Apparently the latter represented conglomerates of adherent spheroid elements that resembled somewhat "large bodies" of L-forms.
(15) The results of immunotitration and immunodiffusion experiments and of the sodium dodecyl sulfate-polyacrylamide gel electrophoretic analysis of immunoprecipitates revealed: (i) a high degree of immunochemical identity of this enzyme only within the family Enterobacteriaceae; (ii) intermediate-to-weak cross-reaction with the phenylalanyl-tRNA ligases from Pseudomonadaceae, Rhodopseudomonas spheroides, and Bacillus stearothermophilus; (iii) no detectable cross-reaction (with the methods employed) with the enzymes from several gram-positive organisms, Euglena gracilis, and several fungi.
(16) Histological alterations included nerve fibre swelling and degeneration, occasional spheroids, astrocytic gliosis, increased macrophage activity and increased perivascular collagen.
(17) The photosynthetically-incompetent mutant V-2 of Rhodopseudomonas spheroides which is incapable of synthesising bacteriochlorophyll was grown aerobically under conditions of both high and low aeration.
(18) Transplanted spheroids continued to express the growth inhibitory activity.
(19) The outer-layer cells of spheroids and fed plateau monolayers peaked at a similar density; the majority of middle-layer cells banded close to unfed plateau and exponential hypoxic monolayers, while most inner-layer cells banded where fed or unfed plateau hypoxic monolayer peaked in density.
(20) Survival of spheroid and monolayer cells after hypertonic NaCl treatment was identical.