Cases reported "hyperplasia"

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1/1975. Giant hyperplasia of the caudate lobe of the cirrhotic liver: correlation with an anomaly of the caudate portal branch.

    Different imaging appearances of giant hyperplastic change of the caudate lobe of the liver are presented in a patient with liver cirrhosis. The mass like caudate lobe was isoechoic on ultrasound, hypodense on postcontrast computed tomography (CT), hyperintense on T1-weighted magnetic resonance, images and isointense on T2-weighted images. These imaging findings are similar to those of dysplastic nodule in cirrhotic liver. The caudate lobe received normal portal flow on CT during arterial portography, but superior mesenteric arteriography showed precocious or early division of the caudate portal branch. We suspect that caudate hyperplastic change may be correlated to anomalous caudate portal vein branch. ( info)

2/1975. Hypergranulotic dyscornification: a distinctive histologic pattern of maturation of epidermal epithelium present in solitary keratoses.

    Hypergranulotic dyscornification is an appellation proposed to designate a newly recognized distinctive pattern of epidermal maturation that is analogous to other epithelial reaction patterns such as epidermolytic hyperkeratosis, focal acantholytic dyskeratosis, cornoid lamellation, pale-cell acanthosis, and follicular mucinosis. The name "benign hypergranulotic keratosis with dyscornification" is proposed to specify solitary keratoses with digitated epidermal hyperplasia that exhibit this exceptional pattern of cornification. This abnormal type of cornification is characterized by hypergranulosis. A pale-staining basophilic substance is present intercellularly within the upper spinous layer and the hyperplastic granular layer. Overlying the thickened granular layer in foci at tips of epidermal papillations are orthokeratotic mounds of large, dull, eosinophilic staining corneocytes that are sharply demarcated from the thickened granular layer. Basophilic keratohyalin granules are focally retained within these corneocytes. There is overlying compact orthokeratosis that extends across the entire lesion. The compact orthokeratosis is slightly basophilic, and lies below a laminated and basket-weave orthokeratotic stratum corneum. There is a predominantly lymphocytic infiltrate at the base of these neoplasms with some spongiosis. There is parakeratosis focally present in the stratum corneum overlying these individual areas of abnormal cornification. The histopathologic and clinical findings in eight lesions that exhibit hypergranulotic dyscornification, a heretofore undescribed unique pattern of epidermal cornification, are presented. ( info)

3/1975. Clear cell acanthoma presenting as polypoid papule combined with melanocytic nevus.

    We report on a case of clear cell acanthoma that developed above a preexisting melanocytic nevus. Although melanocytic nevi can be complicated by the presence of several different types of epithelial or appendageal tumors, there have been no reported case of clear cell acanthoma combined with a nevus. Interestingly, in this case the clear cell acanthoma had a polypoid configuration, an unusual finding. ( info)

4/1975. Endoscopically assisted removal of unilateral coronoid process hyperplasia.

    Coronoid process hyperplasia (CPH) is an uncommon disorder characterized by an enlarged coronoid process impinging against the posterior aspect of the zygomatic arch. Young male adults are usually affected, presenting with limited mouth opening, which is typically painless and progressive in nature. The diagnosis of true CPH is established by the findings of (1) uniform coronoid enlargement on radiographic examination and (2) normal bone structure on histopathological examination (i.e., the specimen should be free of any neoplastic growth, such as the previously reported cases of coronoid osteomas, osteochondromas, or exostoses). The treatment is mainly surgical, by means of a coronoidectomy. An intraoral approach is mostly preferred for this procedure to avoid an external scar. However, to avoid the drawbacks of this approach, such as limited exposure and the risk of hematoma and subsequent fibrosis, an extraoral approach may be indicated. This report describes a case of true unilateral CPH in a 17-year-old boy who presented with progressive limited mouth opening in the absence of any pain. Computed tomography (CT) demonstrated a uniformly enlarged right coronoid process. A coronoidectomy was performed with the aid of endoscopic systems, approaching via two short incisions in the temporal scalp. Histopathological examination of the specimen demonstrated essentially a normal bony structure with no evidence of a neoplasm. The authors present the endoscopically assisted technique of coronoid process excision as an alternative method of surgical treatment of CPH and any mass of the coronoid process in general. With this method, the incision is much shorter than a conventional coronal incision and thus morbidity is diminished considerably. ( info)

5/1975. Electromyographic activity of the jaw-closing muscles before and after unilateral coronoidectomy performed on a patient with coronoid hyperplasia: a case study.

    There have been few reports analyzing the activity of the jaw-closing muscles after coronoidectomy performed on a patient with coronoid hyperplasia. This paper presents a case study using electromyograms (EMGs) to evaluate the effects of unilateral coronoidectomy on the activity of masseter and temporal muscles. The patient was a 25-year-old male whose maximal range of jaw opening was 24 mm. After coronoidectomy of the left region, the range improved to 43 mm. EMGs were recorded in the center of the masseter muscles and the anterior part of the temporal muscles during gum chewing. Preoperatively, no abnormal EMG activity was observed. Eight months after surgery, increase in the ratio of the bilateral temporal muscle activity and a decrease in the ratio of the right masseter muscle activity were observed, and the proportion of activity of jaw closing muscles was out of the normal range. Eighteen months after surgery, there was slight return to the preoperative EMG activity. It was concluded that unilateral coronoidectomy could result in EMG changes of masseter and temporal muscles with a gradual return. ( info)

6/1975. thyroid gland papillary carcinoma with fibromatosis-like stroma: case report.

    Papillary carcinoma of the thyroid may show a variable degree of fibrosis of the stroma, but proliferation of the stromal fibroblasts mimicking fibromatosis is rare. There appears to be a new variant of papillary carcinoma of the thyroid associated with exuberant proliferation of the fibroblasts resembling fibromatosis. We present one such case in a 50 year old woman and succinctly reviewed the relevant literature of this rare variant. The necessity of a diligent search for a papillary carcinoma in thyroid gland which shows a proliferative fibrous lesion is stressed. ( info)

7/1975. lower extremity counterpart of the poland syndrome.

    Below-the-knee right leg hypoplasia and ipsilateral toe brachysyndactyly were observed in a 4-year-old female with an otherwise normal phenotype. Electromyographic and nerve conduction studies were normal. The Doppler evaluation was consistent with a 50% reduction in the blood supply from the femoral artery, suggesting vascular disruption as the pathogenic mechanism. Our observations support the hypothesis that a lower extremity counterpart of the poland syndrome does exist and that the extent of limb involvement is dependent on the level of vascular disruption. ( info)

8/1975. Recurrent stenosis of common carotid-intracranial internal carotid interposition saphenous vein bypass graft caused by intimal hyperplasia and treated with endovascular stent placement. Case report and review of the literature.

    Intimal hyperplasia is a well-known cause of delayed stenosis in vein bypass grafts in all types of vascular surgery. Options for treatment of stenosis in peripheral and coronary artery bypass grafts include revision surgery and the application of endovascular techniques such as balloon angioplasty and stent placement. The authors present a case of stenosis caused by intimal hyperplasia in a high-flow common carotid artery-intracranial internal carotid artery (IICA) saphenous vein interposition bypass graft that had been constructed to treat a traumatic pseudoaneurysm of the intracavernous ICA. The stenosis recurred after revision surgery and was successfully treated by endovascular stent placement in the vein graft. The literature on stent placement for vein graft stenoses is reviewed, and the authors add a report of its application to external carotid-internal carotid bypass grafts. Further study is required to define the role of endovascular techniques in the management of stenotic cerebrovascular disease. ( info)

9/1975. pancreatic polypeptide hyperplasia causing watery diarrhea syndrome: a case report.

    Neuroendocrine tumours of the pancreas can secrete numerous peptides, leading to various recognizable clinical syndromes. The secretion of pancreatic polypeptide has been used as a marker for neuroendocrine tumours but is considered to be a biologically inert peptide. A 37-year-old woman had watery diarrhea syndrome from pancreatic polypeptide hyperplasia. Only 2 other reported cases in the literature have described pancreatic polypeptide hyperplasia; however, this is the first reported case in which the patient was successfully treated by surgical resection, with a 2-year follow-up. This report and review of the literature illustrate that pancreatic polypeptide hypersecretion may present as a clinical endocrinopathy. ( info)

10/1975. persistent hyperplastic primary vitreous with retinal tumor in tuberous sclerosis: report of a case including tumoral immunohistochemistry and cytogenetic analyses.

    OBJECTIVE: The authors describe an ocular lesion combining the characteristics of persistent hyperplastic primary vitreous (PHPV) and a retinal tumor in an infant with tuberous sclerosis complex (TSC). STUDY DESIGN: Case report. methods: immunohistochemistry and cytogenetic studies were performed on TSC cells from an intraocular tumor in a 6-week-old infant. RESULTS: Histopathologic examination showed a thick fibrovascular membrane between the aspect of the lens and the astrocytic component of the mass. glial fibrillary acidic protein (GFAP) showed a variable intracytoplasmic reaction in the astrocytic proliferation, involving approximately 50% of the cells. Tissue culture studies showed a fairly rapid proliferation of fusiform cells, consistent with bipolar astrocytic cells. Cytogenetic studies showed one abnormal clone consisting of three hyperdiploid cells with a loss of chromosome 9 and a gain of chromosomes 6 and 12. CONCLUSION: The atypical localization of the retinal tumor could be explained by the fact that it was trapped during its proliferation by the retinal detachment associated with the PHPV. ( info)
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