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Wang SQ, Katz B, Rabinovitz H, Kopf AW, Oliviero M, Rao BK. Lessons on dermoscopy: case #10. Diagnosis: the differential clinical diagnoses were dysplastic nevus, malignant melanoma, and lichen planus-like keratosis. Dermatol Surg 2000; 26:1079-80. [PMID: 11096402 DOI: 10.1046/j.1524-4725.2000.0260111079.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- S Q Wang
- The Ronald O. Perelman Department of Dermatology, New York University Medical Center, New York, New York, USA
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Gutsev GL, Rao BK, Jena P, Li X, Wang LS. Experimental and theoretical study of the photoelectron spectra of MnOx−(x=1–3) clusters. J Chem Phys 2000. [DOI: 10.1063/1.481964] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- Gennady L. Gutsev
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - B. K. Rao
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - P. Jena
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
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Patterson WM, Lefkowitz A, Schwartz RA, Lambert WC, Rao BK. Melanoma in children. Cutis 2000; 65:269-72, 275. [PMID: 10826084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- W M Patterson
- Department of Dermatology, New Jersey Medical School, Newark 07103-2714, USA
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Rao BK, Tyryshkin AM, Roberts AG, Bowman MK, Kramer DM. Inhibitory copper binding site on the spinach cytochrome b6f complex: implications for Qo site catalysis. Biochemistry 2000; 39:3285-96. [PMID: 10727220 DOI: 10.1021/bi991974a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The isolated cytochrome (cyt) b(6)f complex from spinach is inhibited by Cu(2+) with a K(D) of about 1 microM at pH 7.6 in the presence of 1.6 microM decyl-plastoquinol (C(10)-PQH(2)) as a substrate. Inhibition was competitive with respect to C(10)-PQH(2) but noncompetitive with respect to horse heart cyt c or plastocyanin (PC). Inhibition was also pH-sensitive, with an apparent pK at about 7, above which inhibition was stronger, suggesting that binding occurred at or near a protonatable amino acid residue. Equilibrium binding titrations revealed ca. 1.4 tight Cu(2+) binding sites with a K(D) of about 0.5 microM and multiple (>8) weak (K(D) > 50 microM) binding sites per complex. Pulsed electron paramagnetic resonance (EPR) techniques were used to identify probable binding sites for inhibitory Cu(2+). A distinct enhancement of the relaxation time constant for the EPR signal from bound Cu(2+) was observed when the cyt f was paramagnetic. The magnitude and temperature-dependence of this relaxation enhancement were consistent with a dipole interaction between Cu(2+) and the cyt f (Fe(3+)) heme at a distance of between 30 and 54 A, depending upon the relative orientations of Cu(2+) and cyt f heme g-tensors. Two-pulse electron spin-echo envelope modulation (ESEEM) and 4-pulse 2-dimensional hyperfine sublevel correlation (2D HYSCORE) measurements of Cu(2+) bound to isolated cyt b(6)f complex indicated the presence of a weakly coupled nitrogen nucleus. The nuclear quadrupole interaction (NQI) and the hyperfine interaction (HFI) parameters identified one Cu(2+) ligand as an imidazole nitrogen of a His residue, and electron-nuclear double resonance (ENDOR) confirmed the presence of a directly coordinated nitrogen. A model of the 3-dimensional structure of the cytochrome b(6)f complex was constructed on the basis of sequences and structural similarities with the mitochondrial cyt bc(1) complex, for which X-ray structures have been solved. This model indicated three possible His residues as ligands to inhibitory Cu(2+). Two of these are located on the "Rieske" iron-sulfur protein protein (ISP) while the third is found on the cyt f protein. None of these potential ligands appear to interact directly with the quinol oxidase (Q(o)) binding pocket. A model is thus proposed wherein Cu(2+) interferes with the interaction of the ISP protein with the Q(o) site, preventing the binding and subsequent oxidation of plastoquinonol. Implications for the involvement of ISP "domain movement" in Q(o) site catalysis are discussed.
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Affiliation(s)
- B K Rao
- Institute of Biological Chemistry, Washington State University, 289 Clark Hall, Pullman, Washington 99164-6340, USA
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Abstract
BACKGROUND Mid-dermal elastolysis is an acquired disorder of elastic tissue clinically characterized by diffuse fine wrinkling, most often of the trunk and arms. Histologically, a clear band of elastolysis is present in the mid-dermis. OBJECTIVE Although examples of diffuse elastolysis are well known, only a small number of patients with mid-dermal elastolysis have been reported to date. We present two patients with clinical and histological evidence of mid-dermal elastolysis, review the literature, and summarize the salient features of some common disorders of elastic tissue. METHODS The first patient presented with fine wrinkles and papules over the upper arms, upper chest, and axillae, and demonstrated increased laxity of the eyelids. The second patient had striking wrinkles extending in a band-like pattern on her arms, upper chest, back, and abdomen. Neither one of our patients had a previous history of skin inflammation, urticaria, or any other underlying diseases related to their skin changes. Skin biopsies were taken from lesional and perilesional skin of both patients, and were stained with hematoxylin and eosin, and with elastic tissue stain. In addition, a tissue sample from Patient 1 was fixed for electron-microscopy. RESULTS Hematoxylin and eosin stains did not demonstrate specific changes or diagnostic patterns. However, elastic tissue stains revealed a band-like loss of elastic tissue in the mid-dermis. Elastic tissue in the remaining superficial and deep dermis stained normally. Electron-microscopy was consistent with these findings and revealed significant loss of elastic tissue limited to the mid-dermis. CONCLUSION We have presented two cases of mid-dermal elastolysis and reviewed the literature. To date, the pathophysiology of mid-dermal elastolysis had not been elucidated and no definitive therapy exists.
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Affiliation(s)
- B K Rao
- Department of Dermatology, New York Presbyterian Hospital-Cornell University Medical College, New York, NY, 10021, USA
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Rao BK, Kesavulu MM, Giri R, Appa Rao C. Antidiabetic and hypolipidemic effects of Momordica cymbalaria Hook. fruit powder in alloxan-diabetic rats. J Ethnopharmacol 1999; 67:103-109. [PMID: 10616966 DOI: 10.1016/s0378-8741(99)00004-5] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study was undertaken to investigate the effect of Momordica cymbalaria fruit powder on blood glucose and other biochemical parameters in alloxan-induced diabetic rats. The treatment was given for 15 days. After the treatment, a significant reduction was observed in fasting blood glucose levels in the treated diabetic rats, but no hypoglycaemic activity in the treated normal rats. M. cymbalaria treatment showed considerable lowering of serum cholesterol and triglycerides in the treated diabetic group. There was a significant improvement in hepatic glycogen level in treated diabetic rats close to normal level after the treatment with M. cymbalaria. These results suggest that the M. cymbalaria fruit powder possesses antidiabetic and hypolipidemic effects in alloxan-induced diabetic rats.
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Affiliation(s)
- B K Rao
- Department of Biochemistry, Sri Venkateswara University, Tirupathi, A.P., India
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Rao BK, Jena P. Evolution of the electronic structure and properties of neutral and charged aluminum clusters: A comprehensive analysis. J Chem Phys 1999. [DOI: 10.1063/1.479458] [Citation(s) in RCA: 313] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- Gennady L. Gutsev
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - S. N. Khanna
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - B. K. Rao
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - P. Jena
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
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Affiliation(s)
- E A Strauss
- Department of Dermatology, New York Weil Cornell Center of The New York Presbyterian Hospital, New York, New York 10021, USA
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Satyanarayana S, Krishnaiah YS, Rao BK. Involvement of nitric oxide (NO) in hypoglycaemic activity of tolbutamide. Indian J Physiol Pharmacol 1998; 42:551-4. [PMID: 10874360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The study was conducted to find the involvement of Nitric Oxide (NO) using L-arginine, a NO precursor and NG-methyl L-arginine a nitric oxide synthase inhibitor on tolbutamide activity in normal rabbits. L-arginine (25-300 mg/kg, body weight, oral) produced transient and dose dependent hypoglycaemia. When combined with tolbutamide (40 mg/kg, oral) it produced early and prolonged action. The effect of tolbutamide was blocked by NG-methyl L-arginine (5 mg/kg, body weight, oral). The results confirm the involvement of NO in tolbutamide activity and the possibility of using L-arginine as a supplement to antidiabetic drugs in blood glucose control.
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Affiliation(s)
- S Satyanarayana
- Department of Pharmaceutical Sciences, College of Engineering, Andhra University, Visakhapatnam
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Sahin S, Levin L, Kopf AW, Rao BK, Triola M, Koenig K, Huang C, Bart R. Risk of melanoma in medium-sized congenital melanocytic nevi: a follow-up study. J Am Acad Dermatol 1998; 39:428-33. [PMID: 9738777 DOI: 10.1016/s0190-9622(98)70319-6] [Citation(s) in RCA: 109] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND The risk of the occurrence of malignant melanoma (MM) in medium-sized (1.5 to 19.9 cm in diameter) congenital melanocytic nevi (CMN) is the subject of controversy. Universally accepted recommendations regarding the management of such lesions have not been made. OBJECTIVE Our purpose was to assess the risk of MM arising in medium-sized CMN. METHODS The study included 230 medium-sized CMN in 227 patients, first seen in a private dermatology practice from 1955 to 1996, who were followed up for MM arising within their CMNs. Criteria for entry into the study included (1) a clinically diagnosed medium-sized CMN, (2) minimum follow-up period of 1 year, and (3) a photograph of the lesion in the patient's medical record. RESULTS No MM occurred in a medium-sized CMN during an average follow-up of 6.7 years (median, 5.8 years) to an average age of 25.5 years (median, 19.1 years). CONCLUSION The results of this short-term follow-up study do not support the view that there is a clinically significantly increased risk for MM arising in banal-appearing medium-sized CMN or that prophylactic excision of all such lesions is mandatory. Lifelong medical observation seems a reasonable alternative for many medium-sized CMN.
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Affiliation(s)
- S Sahin
- Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, USA
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Affiliation(s)
- B. V. Reddy
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - S. K. Nayak
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - S. N. Khanna
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - B. K. Rao
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
| | - P. Jena
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000
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Venu K, Diggikar AD, Rao BK. Carcinoid tumour: laser therapy. Indian J Chest Dis Allied Sci 1997; 39:129-32. [PMID: 9339613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A 31-year-old female, pregnant (I trimester), presented with symptoms and signs of bronchial asthma. Chest roentgenogram and computerized tomography of the chest revealed right mid and lower zone opacity (collapse). Bronchoscopic examination revealed intrabronchial growth in the right middle and lower lobe bronchus. Biopsy and histopathological examination confirmed carcinoid tumour. These symptoms and signs disappeared after laser therapy. The lesion, however, recurred two years later.
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Affiliation(s)
- K Venu
- Department of Tuberculosis and Chest Diseases, A. P. Chest Hospital, Hyderabad
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DeDavid M, Orlow SJ, Provost N, Marghoob AA, Rao BK, Huang CL, Wasti Q, Kopf AW, Bart RS. A study of large congenital melanocytic nevi and associated malignant melanomas: review of cases in the New York University Registry and the world literature. J Am Acad Dermatol 1997; 36:409-16. [PMID: 9091472 DOI: 10.1016/s0190-9622(97)80217-4] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Patients with large congenital melanocytic nevi (LCMN) are at greater risk for the development of malignant melanoma (MM) than are persons in the general population. OBJECTIVE Our purpose was to identify the clinical features of LCMN in those patients in whom MMs actually developed. METHODS The records of 117 patients in the New York University Registry of LCMN and the reports of 172 cases of LCMN in the world literature were studied. RESULTS Of the 289 cases of LCMN studied, 34 patients (12%) had primary cutaneous MMs within their nevi; in two additional patients, MMs developed at cutaneous sites other than within their nevi. All patients in whom MM developed within LCMN had nevi in axial locations; however, 91% of the LCMN were axial. No MM was found that had arisen in any of the 26 LCMN confined to the extremities. In addition, no MM was found that had arisen in thousands of satellite nevi. CONCLUSION When MM develops within an LCMN, it generally does so in those LCMN in an axial location. The absence of cases of MM arising in LCMN confined to the extremities suggests that such nevi represent lower risk lesions, but the number of extremity nevi analyzed was too small to allow definitive conclusions. A striking finding was the absence of MMs arising in satellite nevi.
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Affiliation(s)
- M DeDavid
- Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, USA
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Affiliation(s)
- Saroj K. Nayak
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284
| | - S. N. Khanna
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284
| | - B. K. Rao
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284
| | - P. Jena
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284
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Rao BK, Marghoob AA, Stolz W, Kopf AW, Slade J, Wasti Q, Schoenbach SP, De-David M, Bart RS. Can early malignant melanoma be differentiated from atypical melanocytic nevi by in vivo techniques? Skin Res Technol 1997; 3:8-14. [PMID: 27333167 DOI: 10.1111/j.1600-0846.1997.tb00153.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- B K Rao
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - A A Marghoob
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - W Stolz
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - A W Kopf
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - J Slade
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - Q Wasti
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - S P Schoenbach
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - M De-David
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
| | - R S Bart
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine and the Oncology Section, Charles C. Harris Skin and Cancer Pavilion, New York University Medical Center; the New York University Melanoma Cooperative Group, New York, New York1the Department of Dermatology, the State University of New York at Stony Brook, New York, USA2the Department of Dermatology, University of Regensburg, Germany
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DeDavid M, Orlow SJ, Provost N, Marghoob AA, Rao BK, Wasti Q, Huang CL, Kopf AW, Bart RS. Neurocutaneous melanosis: clinical features of large congenital melanocytic nevi in patients with manifest central nervous system melanosis. J Am Acad Dermatol 1996; 35:529-38. [PMID: 8859278 DOI: 10.1016/s0190-9622(96)90674-x] [Citation(s) in RCA: 187] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND Patients with a large congenital melanocytic nevus (LCMN) may have associated leptomeningeal melanocytosis with or without central nervous system (CNS) melanomas. These patients are considered to have neurocutaneous melanosis, a disorder that, when symptomatic or otherwise manifest neurologically, carries a poor prognosis even in the absence of malignancy. OBJECTIVE Our purpose was to identify typical clinical features in patients who have manifest CNS melanosis in association with LCMN. METHODS The records of 117 patients with LCMN in the New York University Registry of LCMN and the reports of 172 cases of LCMN in the world literature were included for features that might signal a high risk for the development of manifest CNS involvement. RESULTS Of the 289 patients with LCMN, 33 had manifest CNS melanosis. In all 33 in whom symptomatic neurocutaneous melanosis was diagnosed, the LCMNs were present in a posterior axial location on the head, neck, back, and/or buttocks. "Satellite" nevi were known to be present in 31 of the 33 patients. CONCLUSION Patients with LCMN in a posterior axial location, especially when associated with "satellite" melanocytic nevi, are at greater risk for the development of manifest neurocutaneous melanosis than patients with LCMN limited to the extremities or those who are lacking satellite nevi.
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Affiliation(s)
- M DeDavid
- Ronald O. Pereiman Department of Dermatology, New York University School of Medicine, New York, USA
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Pusztai R, Motohashi N, Párkányi C, Aaron JJ, Rao BK, Molnár J. Relationship between tumor (T) antigen expression and substituent effects on benzo [a] phenothiazines. Anticancer Res 1996; 16:2961-4. [PMID: 8917413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Human adenovirus, oncogene-type 12 infected HEp-2 cells were exposed to six benzo[a]phenothiazines. 5-Oxo-5H-benzo[a]phenothiazine (4) and 6-hydroxy-5-oxo-5H-benzo[a]phenothiazine (5) were moderately toxic. 9-Methyl-12H-benzo[a]phenothiazine (2), 10-methyl-12H-benzo[a]phenothiazine (3), 6-methyl-5-oxo-5H-benzo[a]phenothiazine (6), and 12H-benzo[a]phenothiazine (1) were not toxic in the system tested. 6-Methyl-5-oxo-5H-benzo[a]phenothiazine (6) enhanced the expression of viral oncogene product (tumor antigen) in the adenovirus infected cells. 5-Oxo-5H-benzo[a]phenothiazine (4) and 6-hydroxy-5-oxo-5H-benzo[a]phenothiazine (5) reduced this effect. 6-Methyl-5-oxo-5H-benzo[a]phenothiazine (6), with hyperconjugation due to the methyl group, increased the T antigen activity at higher dose concentrations, whereas 6-hydroxy-5-oxo-5H-benzo[a]phenothiazine (5) with a hydroxy substituent had the opposite effect on T antigen expression. The methyl substitution at positions C9 or C10 increased the T antigen expression of adenovirus infected cells.
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Affiliation(s)
- R Pusztai
- Faculty of Medicine, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Abstract
We describe four cases of unusual superficial cutaneous cysts that have a lining epithelium composed of apocrine cells immediately adjacent to keratinizing squamous epithelium with an intact granular layer. Two of the cysts were on the nipple of the breast and two of the cysts were on the face. The lumina of all four cysts contained keratin. Immunoperoxidase staining for carcinoembryonic antigen in the facial cysts showed positive staining within the apocrine cells of the lining epithelium in one case. The pathogenesis of these lesions is uncertain. We suggest that these unusual cysts be called hybrid epidermoid and apocrine cysts.
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Affiliation(s)
- W K Andersen
- Department of Dermatology, Boston University School of Medicine, Massachusetts, USA
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Abstract
This study sought to establish normal dimensions of the fetal gallbladder throughout pregnancy. The gallbladders in 300 normal fetuses between 15 and 40 weeks of gestation were measured prospectively for length, anteroposterior dimension, and transverse dimension. The gallbladder length, anteroposterior diameter, and transverse diameter have a linear relationship with gestational age between 15 weeks and 30 weeks of gestation, after which a plateau is observed. Calculated gallbladder area, volume, and sagittal perimeter have similar rates of growth in utero. The normative dimensions we have established for the fetal gallbladder throughout pregnancy can be expected to serve as a basis against which aberrant growth can be evaluated prenatally.
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Affiliation(s)
- L Chan
- Department of Obstetrics/Gynecology, Jefferson Medical College, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA
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Niu J, Rao BK, Jena P, Manninen M. Interaction of H2 and He with metal atoms, clusters, and ions. Phys Rev B Condens Matter 1995; 51:4475-4484. [PMID: 9979292 DOI: 10.1103/physrevb.51.4475] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rao BK, Freeman RG, Poulos EG, Arbesfeld L, Rendon M. The relationship between basal cell epithelioma and seborrheic keratosis. A study of 60 cases. J Dermatol Surg Oncol 1994; 20:761-4. [PMID: 7962939 DOI: 10.1111/j.1524-4725.1994.tb03201.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Various skin tumors can be seen rarely in association with seborrheic keratosis. We present 60 cases of seborrheic keratosis related to a basal cell epithelioma in the same specimen. OBJECTIVE To report association of basal cell epithelioma with seborrheic keratosis and discuss the possibility of malignant change in seborrheic keratosis. METHODS Sixty cases of seborrheic keratosis associated with basal cell epithelioma were studied. Tissues were fixed in neutral buffered formalin, processed, and stained with standard hematoxylin and eosin techniques. RESULTS Histological evaluation showed a seborrheic keratosis associated with basal cell epithelioma in all of the cases. Basal cell epithelioma was attached with seborrheic keratosis in a majority of the cases (40/60) and appeared to represent a part of the same tumor. Both tumors were lying adjacent to each other in the rest of the cases (20/60). CONCLUSION Malignant change in seborrheic keratosis is controversial. We recommend the histological evaluation of seborrheic keratosis especially when inflamed or atypical in appearance. This should not be taken as a mandate for pathological evaluation or for treatment of every seborrheic keratosis as though it was potentially malignant.
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Affiliation(s)
- B K Rao
- Department of Dermatology, Boston University School of Medicine, Massachusetts
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Niu J, Rao BK, Jena P. Niu, Rao, and Jena reply. Phys Rev Lett 1993; 70:3837. [PMID: 10053978 DOI: 10.1103/physrevlett.70.3837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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84
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Rao BK, Khanna SN, Jena P. Role of excess electrons on the stability of metal-cluster hydrides. Phys Rev B Condens Matter 1992; 45:13631-13635. [PMID: 10001454 DOI: 10.1103/physrevb.45.13631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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85
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Wieselthier JS, Treloar V, Koh HK, Rao BK, Ahmed AR. Multiple crusted plaques in a woman with systemic lupus erythematosus. Pemphigus erythematosus (PE). Arch Dermatol 1991; 127:1572-3, 1575-6. [PMID: 1929469 DOI: 10.1001/archderm.127.10.1572] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- J S Wieselthier
- University School of Medicine, Harvard Medical School, Boston, Mass
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Li Y, Rao BK, McMullen T, Jena P, Khowash PK. Electronic structure of the LiMgH3 class of compounds: Cluster calculations. Phys Rev B Condens Matter 1991; 44:6030-6036. [PMID: 9998464 DOI: 10.1103/physrevb.44.6030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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88
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Fleischer AC, Rogers WH, Rao BK, Kepple DM, Jones HW. Transvaginal color Doppler sonography of ovarian masses with pathological correlation. Ultrasound Obstet Gynecol 1991; 1:275-278. [PMID: 12797059 DOI: 10.1046/j.1469-0705.1991.01040275.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This report describes the correlation of pathological findings with transvaginal color Doppler sonography performed preoperatively on 26 ovarian masses. The pulsatility indices of benign lesions (1.9 +/- 0.7) were higher than those of malignant ones (0.7 +/- 0.2) (p = 0.03). Low pulsatility indices (< 1.0) were found in three relatively vascular benign lesions (one immature teratoma, one cystadenoma containing a dermoid cyst, one endometrioma), causing an overlap between the pulsatility indices of some benign and malignant masses. There appears to be significant potential for discrimination between benign and malignant ovarian masses with transvaginal color Doppler sonography.
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Affiliation(s)
- A C Fleischer
- Section of Diagnostic Sonography, Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee 37232-2675, USA
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89
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Smith SP, Grossman K, Rao BK, Koh HK, Cooley TD. Solitary papule of the lip in recurrent gastroesophageal carcinoma: an unusual presentation of cutaneous metastasis. Arch Dermatol 1991; 127:588-9. [PMID: 2006893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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90
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Rao BK. Color flow Doppler sonography of the abdomen. Curr Opin Radiol 1991; 3:225-9. [PMID: 2049271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This paper reviews recent developments in color flow Doppler sonography of the abdomen reported from October 1989 to September 1990. Areas of focus include instrumentation and technical considerations, and current clinical applications.
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Affiliation(s)
- B K Rao
- Department of Radiology, Vanderbilt University School of Medicine, Nashville, TN 37232
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91
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Rao BK, Khanna SN, Jena P. Energetics and electronic structures of hydrogenated metal clusters. Phys Rev B Condens Matter 1991; 43:1416-1421. [PMID: 9997391 DOI: 10.1103/physrevb.43.1416] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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92
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Rao BK, Sollinger H, Shulak J. DUPLEX DOPPLER EVALUATION OF PANCREAS TRANSPLANTS. Invest Radiol 1990. [DOI: 10.1097/00004424-199012000-00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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93
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Fleischer AC, Rao BK, Koch MO. New developments in transrectal sonography of the prostate. Curr Opin Radiol 1990; 2:777-84. [PMID: 2282253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- A C Fleischer
- Vanderbilt University Medical Center, Medical Center North, Nashville, Tennessee
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94
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Abstract
A women had annular lesions of subacute cutaneous lupus erythematosus that slowly resolved and were replaced by plaques of morphea. The immunologic implications of this unique transitional case of subacute cutaneous lupus erythematosus to morphea are discussed.
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Affiliation(s)
- B K Rao
- Division of Dermatopathology, University of Texas Southwestern Medical Center, Dallas
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Rao BK, Jena P, Darsey JA. Theoretical study of muon-induced solitons in polyacetylene. Phys Rev B Condens Matter 1990; 42:3052-3056. [PMID: 9995799 DOI: 10.1103/physrevb.42.3052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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96
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Rao BK, Fleischer AC. Sonography of the gastrointestinal tract. Curr Opin Radiol 1990; 2:207-12. [PMID: 2202389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- B K Rao
- Vanderbilt University Medical Center, Nashville, Tennessee
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Darsey JA, Kuehler JF, Rao BK. Scf-Mo Studies of the Rotational Potential Energy Surface of Trans-Cisoidal Polyacetylene. J of Macromolecular Sc , Part A 1990. [DOI: 10.1080/10601329008544736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
Twenty-five cases of fibrous papule of the nose were studied by light microscopy and by immunohistochemistry using a panel of 4 cell markers. These included polyclonal antibodies against S100 protein and Factor XIII-a (FXIII-a), and 2 monoclonal antibodies, MAC 387 which labels monocyte derived macrophage cells and Ulex Europaeus Agglutinin-1 (UEA-1) a pan endothelial cell marker. An increase in the number of S100 protein positive cells, particularly in the upper dermis, was observed in 3 lesions. Melanin was identified in phagocytes in the superficial dermis in 6 lesions, including those with S100 protein positive cells. In all of the papules there was a marked increase in FXIII-a labelling of dendritic connective tissue cells, including spindle, stellate and multinucleate stellate cells. Immunoreactivity with FXIII-a was especially strong in the increased mononuclear dendritic cell population (greater than 80%) seen in the mid- and upper dermis. However, only 15% of the larger multinucleate stellate cells were immunostained with FXIII-a. The results achieved with markers to the macrophage cell series (MAC 387) or endothelial cells (UEA-1) showed no significant increase in labelling of the dermal cell population compared to normal skin taken from the nose. Our study suggests that fibrous papule of the nose, a lesion of uncertain histogenesis, probably represents a proliferative reactive process consisting mainly of dermal dendritic cells as identified by FXIII-a in most of the lesions. There is some evidence that a small percentage of the dendritic cells may represent involuted naevi and be of melanocytic origin.
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Affiliation(s)
- R Cerio
- Department of Histopathology, St. John's Hospital for Disease of the Skin, London, England
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Khanna SN, Jena P, Rao BK. Charge-exchange reactions in metal clusters: Role of magic numbers. Phys Rev B Condens Matter 1989; 40:966-969. [PMID: 9991915 DOI: 10.1103/physrevb.40.966] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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100
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Balasubramanian R, Aroor AR, Gopalakrishnan K, Shenoy UD, Rao AV, Rao BK. A case of pre-leukaemia masquerading as haemolytic anaemia due to multi-enzymopathy of the red cell. J Assoc Physicians India 1989; 37:239-40. [PMID: 2768172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A 19 year old woman presented as a case of haemolytic anaemia due to multi-enzyme deficiency of the erythrocyte. After a transient improvement with folic acid therapy, she developed acute myeloblastic leukaemia. This is the second reported case of a myelodysplastic syndrome presenting with a haemolytic picture and subsequently developing an acute myeloblastic leukaemia.
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