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Biomedical subjects

M Legros

Publications and source records attributed to M Legros.

At least 73 records · Page 4Linked to original sources
PubMed1985

[Malignant tumor of testicular gonadal stroma. Treatment by combined chemotherapy-radiotherapy].

The authors report the case of a 49-years-old man with an undifferentiated malignant gonadal stromal tumor of the right testis. Malignancy is confirmed by metastasis in the retroperitoneal lymph nodes. After 6 courses of chemotherapy with Cis-platinum, a retroperitoneal lymphadenectomy was performed and the section of the nodes showed a muscular differentiation of the tumor. This drug regimen did nod induce a complete response and an early recurrence occurs after lymphadenectomy which included the right ureter. The renal function was preserved by the way of a double J indwelling ureteral stent. A total remission was obtained with chemotherapy using Cis-platinum and 5-Fluorouracil, associated with a rapid fraction irradiation for six courses. Total response was assessed by scanner and by a laparotomy for bowel radiation sclerosis.

Combined Modality Therapy↗
PubMed1984

Immunohistochemical localization of macromolecules of the basement membrane and the peritumoral stroma in human laryngeal carcinomas.

Forty laryngeal carcinomas were studied by immunofluorescence with specific antisera against components of the basement membrane (type IV collagen and laminin) as well as antisera against connective tissue antigens (type V collagen and fibronectin). The basement membrane surrounding well-differentiated squamous cell carcinomas showed an appearance similar to that seen beneath normal epithelium. In contrast, marked alterations of the basement membrane were constantly observed around infiltrating and poorly-differentiated carcinomas. The staining of connective tissue components in most cases was as intense in carcinomas as in normal laryngeal mucosa. The use of antibodies to basement membrane components may help to elucidate the mechanism of invasion of connective tissues by malignant cells.

Basement Membrane↗
PubMed1984

Variations in committed stem cells (CFU-GM and CFU-TL) in the peripheral blood of cancer patients treated by sequential combination chemotherapy for breast cancer.

The present work compared the blood variations in some committed stem cells (CSC), and corresponding differentiated WBC during the first three courses of a 6-day sequential chemotherapy given to 16 breast cancer patients for 28 days each. The granulomonocytic and lymphocytic colony-forming unit levels in blood were significantly lowered in cancer patients before treatment. These CSC appeared to have cyclic variations following each course of chemotherapy. In granulomonocytic colony-forming units, a nadir was observed by Day 15, followed by a sharp rebound above the initial values by Days 22 to 24, which was not affected in magnitude by the continuation of treatment. In lymphocytic colony-forming units, the Day 1 level increased with the continuation of chemotherapy. The initial decrease was less marked, but by Day 15 a minimal level was also observed, followed by a progressive increase to reach a maximum by Day 28. Leukocytes and granulocytes reached a nadir by Days 16 to 17 and recovered by Day 25. The cyclic evolution of monocytes was less apparent as was that of lymphocytes; however, there was less restoration of monocytes and lymphocytes than of granulocytes at the end of the resting period. This study showed: (a) an apparent relationship between the level of CSC in blood, and subsequent variations in the corresponding mature cells of the same lineage; and (b) a weak interval of time between the nadir and peaks of CSC and the corresponding mature cells, which was more evident in the granulocytic lineage. These observations seemed to be of physiological importance, but the possible prediction value of peripheral granulomonocytic colony-forming unit peak magnitude following treatment remains to be established.

Adult↗
PubMed1983

Hyperfractionated radiotherapy in advanced squamous cell carcinoma of the head and neck.

From January, 1976 to January, 1980, 141 patients (135 males and 6 females) with Stage III and IV squamous cell carcinoma of the head and neck received a split course of hyperfractionated radiotherapy (HFR). In the first group, involving 91 patients, the therapeutic schedule was as follows: first and fourth week, 7.2 Gy per day in 8 sessions of .9 Gy from Monday to Friday, the second and third week no irradiation was given. Thus, patients were given 72 Gy total dose, fractionated into 80 sessions. Mucosal necrosis and severe hemorrhage were responsible for the death of 26 patients (28%). Therefore the therapeutic protocol was altered for the 50 patients of the second group: during the first and sixth week 6.6 Gy per day in 6 sessions of 1.1 Gy from Monday to Friday. The total dose was thus reduced to 66 Gy fractionated into 60 sessions, resulting in the decrease of toxicity. Regardless of the therapeutic protocol and site of primary, 114 patients (80%) achieved a complete remission and 8 showed a partial remission (greater than 50%), whereas no change was seen for the 19 remainders. Local recurrence appeared in 60 patients (48%). Acute mucositis and laryngeal edema regularly occurred a week after every course of HFR and were considered severe in 40 patients. In spite of toxicity, the median survival is 14 months and 22 patients are still alive in November 1981: 19 without disease, and 8 of these patients have a survival time of at least 3 years.

Adult↗