摘要:

Recently, we observed three examples of a focal area of increased activity “hot spot” in the region of the porta hepatis. A review of the literature on this observation has identified it with a variety of causes commonly associated with alteration in superior vena cava (SVC) and hepatic circulatory dynamics. To investigate this alteration in hepatic circulatory dynamics, radionuclide99mTc-macroaggregated albumin (MAA)) venacavograms, contrast venacavograms, CT scans, tissue needle biopsy, open surgical biopsy and autopsy were used in these patients. Two additional patients with known mediastinal masses, but with normal or areas of decreased activity on their liver scans, were evaluated by the same methods. The anatomy involved in altered SVC circulation and collateral shunting through the porta hepatis venous circulation producing the “hot spot” was analyzed from radionuclide flow patterns and liver scans. All three patients had SVC or subclavian compression by extrinsic neoplastic masses, creating increased collateral flow through the porta hepatis. Individual variations in collateral shunt patterns were observed. We concluded from our observations that important factors involved in the creation of the liver scan “hot spot” were: 1) site of SVC or subclavian vein compression; 2) degree of SVC or subclavian obstruction; and 3) individual variation in venous collateral patterns.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

A simple method of demonstrating shunt morphology with99mtechnetium diethylene triamine penta-acetic acid (99mTc-DTPA) is described. The anatomic abnormalities are illustrated. Demonstration of the site of obstruction is useful in selecting the neurosurgical approach. The procedure is minimally invasive, accurate, and simple to interpret.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

A rare case of hypertrophic osteoarthropathy (HO) limited to one lower extremity is described in a male with a history of familial polyposis coli and bilateral aortofemoral grafts. The precise etiology remains unknown. Radiography depicted the HO, but99mTc-methylene diphosphonate imaging showed more extensive involvement. An intra-aortic injection of99mTc-macroaggregates of albumin portrayed a larger blood flow to the involved limb compared to the contralateral extremity. The major part of this increase was in bone rather than in the adjacent soft tissue.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Adrenal scintigraphy was performed on 23 patients with low renin essential hypertension (LREH). After baseline scintigraphy was shown not to be helpful, 13 of these 23 patients underwent dexamethasone suppression adrenal scintigraphy. Four adrenal imaging patterns were observed: unilateral imaging with adenoma; bilateral early or late imaging with hyperplasia; no uptake with normal adrenals. These imaging patterns were shown to be predictive of the individual patient's response to spironolactone administration. This demonstration of functional adrenal cortical abnormalities in LREH supplies direct evidence for the hypothesis that LREH has an adrenal mineralocorticoid etiology.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

The authors report a scintigraph of a 76-year-old man interpreted as being of a partially herniated spleen constricted by the diaphragm. The constriction proved illusory.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

A case of99mTc-pyrophosphate uptake in an islet cell tumor of the pancreas is presented. A possible relationship of pyrophosphate uptake in this tumor with uptake in other neuroectodermal tumors which are of neural crest origin is considered.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Osteomalacia presents radiographically as deossification, coarsening of the trabecular pattern, and pseudofractures. Contrary to the usual bone scan manifestation of osteomalacia, consisting of a generalized increase in periarticular radionuclide accumulation and pronounced costochondral junctional uptake, this report describes an unusual bone scan presentation with negative radiographic studies showing only some deossification. Symmetric distribution of the focal lesions is considered a suggestive sign of osteomalacia.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

A family of four patients suffering from Nonne-Milroy disease has been examined by pedal scintilymphangiography. Lower limb edema was present in three patients and was bilateral in two instances. Scintilymphangiographic abnormality was invariably present, ranging from almost total obstruction of lymphatic flow to lymphatic pooling. The inguinal, iliac and para-aortic nodes on the affected sides were also noted to be small and few in number. The examination is safe and simple and may be used to distinguish Nonne-Milroy edema from edema due to other causes.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID