Itching, flaking, or crusting of the scalp may be caused by: 1  Cradle cap, an oily, yellow crusting on a baby's scalp. 2  Dandruff, a shedding of the skin on the scalp that leaves white flakes on the head, neck, and shoulders. 3  Head lice, tiny wingless insects that cause itching and raw patches on the scalp. Head lice are most common in school-age children. Ringworm, a fungal infection of the outer layer of the scalp and in the hair. It usually causes a rash made up of circular patches with raised, red edges that resemble worms.
heteronymous hemianopia. Also found in: Dictionary, Thesaurus. Related to heteronymous hemianopia: bitemporal hemianopsia. hetÂ·erÂ·onÂ·yÂ·mous hemÂ·iÂ·anÂ·oÂ·piÂ·a. attitudinal hemianopia involving the upper field of one eye and the lower field of the other; or a binasal or bitemporal hemianopia.
Overall, heterogeneous marrow is hypointense relative to WM. A subsequent bone scan was diffusely abnormal. Pelvic marrow biopsy revealed metastatic adenocarcinoma. In this patient, alteration of the marrow signal intensity on T1-weighted images was the first indication of metastatic disease.o detect marrow abnormalities on MR images, an understanding of the normal temporal patterns of red bone marrow and yellow bone marrow is important. The composition of marrow varies both with age and anatomic location. At birth and throughout early childhood, marrow is predominantly hematopoietic (red).