funnel-shaped pelvis

pelvis /pel·vis/ (pel´vis) pl. pel´ves   [L.] the lower (caudal) portion of the trunk, bounded anteriorly and laterally by the two hip bones and posteriorly by the sacrum and coccyx. Also applied to any basinlike structure, e.g., the renal pelvis.pel´vic

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android pelvis  one with a wedge-shaped inlet and narrow anterior segment; used to describe a female pelvis with characteristics usually found in the male.

anthropoid pelvis  a female pelvis in which the anteroposterior diameter of the inlet equals or exceeds the transverse diameter.

assimilation pelvis  one in which the ilia articulate with the vertebral column higher (high assimilation p.) or lower (low assimilation p.) than normal, the number of lumbar vertebrae being correspondingly decreased or increased.

beaked pelvis  one with the pelvic bones laterally compressed and their anterior junction pushed forward.

brachypellic pelvis  one in which the transverse diameter exceeds the anteroposterior diameter by 1 to 3 cm.

contracted pelvis  one showing a decrease of 1.5 to 2 cm in any important diameter; when all dimensions are proportionately diminished it is a generally contracted p. (p. justo minor).

dolichopellic pelvis  an elongated pelvis, the anteroposterior diameter being greater than the transverse diameter.

extrarenal pelvis  see renal p.

false pelvis  the part of the pelvis superior to a plane passing through the iliopectineal lines.

flat pelvis  one in which the anteroposterior dimension is abnormally reduced.

funnel-shaped pelvis  one with a normal inlet but a greatly narrowed outlet.

gynecoid pelvis  the normal female pelvis: a rounded oval pelvis with well-rounded anterior and posterior segments.

infantile pelvis  a generally contracted pelvis with an oval shape, high sacrum, and marked inclination of the walls.

pelvis jus´to ma´jor  an unusually large gynecoid pelvis, with all dimensions increased.

pelvis jus´to mi´nor  a small gynecoid pelvis, with all dimensions symmetrically reduced; see also contracted p.

juvenile pelvis  infantile p.

pelvis ma´jor  false p.

mesatipellic pelvis  one in which the transverse diameter is equal to the anteroposterior diameter or exceeds it by no more than 1 cm.

pelvis mi´nor  true p.

platypellic pelvis , platypelloid pelvis one shortened in the anteroposterior aspect, with a flattened transverse oval shape.

rachitic pelvis  one distorted as a result of rickets.

renal pelvis  the funnel-shaped expansion of the upper end of the ureter into which the renal calices open; it is usually within the renal sinus, but under certain conditions a large part of it may be outside the kidney (extrarenal p.) .

scoliotic pelvis  one deformed as a result of scoliosis.

split pelvis  one with a congenital separation at the pubic symphysis.

spondylolisthetic pelvis  one in which the last, or rarely the fourth or third, lumbar vertebra is dislocated in front of the sacrum, more or less occluding the pelvic brim.

true pelvis  the part of the pelvis inferior to a plane passing through the iliopectineal lines.

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funnel-shaped pelvis

n.

A pelvis in which the inlet dimensions are normal, but the outlet is contracted in the transverse diameter or in both transverse and anteroposterior diameters.