Invasive Papillary Breast Carcinoma.

We present the case of a 55-year-old postmenopausal female who presented with complaints of a gradually increasing painless subareolar mass in the left breast of 4 months' duration. Left-sided modified radical mastectomy was performed and the specimen was histopathologically diagnosed as invasive papillary carcinoma. Immunohistochemistry confirmed this diagnosis. All 8 excised axillary lymph nodes were negative for malignant cells. Postoperative chemotherapy was given and for the past 6 months, the patient has maintained a regular follow-up on an outpatient basis. She does not have any evidence of either local or distant recurrence of tumour metastases.

Metaplastic carcinoma with predominant chondrosarcoma of the right breast.

A 45-year-old female presented with complaint of a lump in the right breast for the last 6 months. Excisional biopsy had been performed outside our institution, which was suggestive of a pure mammary chondrosarcoma. Modified radical mastectomy of the right breast was performed and histopathology was suggestive of a pure mammary chondrosarcoma of the right breast. One axillary lymph node was positive for metastasis, the rest of the lymph nodes were free of metastasis. Immunohistochemistry was suggestive of a metaplastic carcinoma with a predominant chondrosarcoma in the right breast. Postoperative radiotherapy was given to the patient with a further plan of chemotherapy.

Pure choriocarcinoma of ovary diagnosed by fine needle aspiration cytology.

Pure ovarian choriocarcinoma is extremely rare and can develop as a germ cell tumor or as a metastasis from uterine or tubal gestational choriocarcinoma or rarely from an ovarian pregnancy. The cytomorphologic findings have been reported previously in different sites. However, this is the first case of pure ovarian choriocarcinoma diagnosed on cytology to the best of our knowledge. The distinction between a gestational and nongestational choriocarcinoma is difficult. A 19-year-old female patient presented with an irregular per-vaginal bleeding and a mass in lower abdomen. Fine needle aspiration cytology smears of the mass were hypocellular and showed large, multinucleated giant cells and malignant mononucleated cells. Background was hemorrhagic. Serum beta hCG level was 3,80,000 mIU/ml. A diagnosis of choriocarcinoma was offered which was later confirmed by histopathology. The diagnosis of choriocarcinoma on fine needle aspiration cytology is based on the presence of large, multinucleated giant cells and malignant mononucleated cells. A high index of suspicion should be maintained and estimation of serum beta hCG plays a key role in supporting the diagnosis.

Sol-gel synthesized semiconducting LaCo0.8Fe0.2O3-based powder for thick film NH3 gas sensor.

Perovskite type LaCo(x)Fe(1-x)O(3) nanoparticles was synthesized by a sol-gel citrate method. The structural, electrical and sensing characteristics of the LaCo(x)Fe(1-x)O(3) system were investigated. The structural characteristics were performed by using X-ray diffraction (XRD) and transmission electron microscopy (TEM) to examine the phase and morphology of the resultant powder. The XRD pattern shows nanocrystalline solid solution of LaCo(x)Fe(1-x)O(3) with perovskite phase. Electrical properties of synthesized nanoparticles are studied by DC conductivity measurement. The sensor shows high response towards ammonia gas in spite of other reducing gases when x=0.8. The effect of 0.3 wt.% Pd-doped LaCo(0.8)Fe(0.2)O(3) on the response and a recovery time was also addressed.

H2S sensing properties of nanocrystalline Sr2Fe(0.6)Ni(0.4)MoO6 thick film prepared by sol-gel citrate method.

Nanocrystalline Sr(2)FeMoO(6) (SFMO) belonging to the group of double perovskite oxides, was prepared by the sol-gel citrate method. The structural and microstructural characterization has been carried out with the help of X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. XRD of Sr(2)Fe(1-x)Ni(x)MoO(6) (SFNMO) shows the formation of solid solution with average grain size of about 40nm. A comparative study of gas sensing behaviour of Sr(2)FeMoO(6) and Sr(2)Fe(1-x)Ni(x)MoO(6) with reducing gases like hydrogen sulfide (H(2)S), liquid petroleum gas (LPG), hydrogen (H(2)), ethanol (C(2)H(5)OH) and carbon monoxide (CO) were also discussed. The sensitivity is calculated by measuring the change the resistance of the sensor material in the presence of gas. Among the different composition of x (x=0.2, 0.3, 0.4, 0.5), Sr(2)Fe(0.6)Ni(0.4)MoO(6) (x=0.4) shows better response to H(2)S gas at 260 degrees C. Incorporation of palladium (Pd) improves the gas response, selectivity, response time and reduced the operating temperature from 260 to 220 degrees C for H(2)S gas.