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Background: Repeat renal biopsy is usually done for lupus nephritis (LN) flare or resistant disease. We analyzed the changes between first and repeat biopsy and the contribution of repeat biopsy on renal outcome in LN patients. Methods: This was a retrospective study carried out at a tertiary care center in India. Sixty-two LN patients who underwent repeat biopsy for clinical indications, between January 2012 to December 2016, were included. Clinical and histological parameters at first and second biopsies were compared. Logistic regression analysis was done to determine parameters on repeat biopsy predicting response at last visit. Results: Repeat biopsy was done for relapse in 56% and for resistant disease in 44% patients. Seven (13.7%) out of 51 patients with baseline proliferative histology converted to non-proliferative lesion on second biopsy, while 2 (18.2%) out of 11 with baseline non-proliferative lesion converted to proliferative lesion on second biopsy. On repeat biopsy, the presence of endocapillary proliferation decreased, whereas glomerulosclerosis, interstitial fibrosis/tubular atrophy (IFTA), and glomerular basement membrane thickening increased. At the last visit (median follow-up of 38.6 months after first biopsy and 13.8 months after second biopsy), 79% of patients were in remission and 6.5% needed renal replacement therapy. The presence of IFTA >30% and thrombotic microangiopathy (TMA) on second biopsy independently predicted response at last visit. Conclusion: In Indian patients with LN, chronicity markers and superimposed membranous pattern increased on repeat biopsy done for clinical indications. The presence of IFTA and TMA on second biopsy predicted response at last visit. [ABSTRACT FROM AUTHOR]

Deranged coagulogram is a common problem, which a nephrologist faces before doing a renal biopsy. We describe a rare cause of coagulopathy in a patient with rapidly progressive renal failure due to acquired factor X deficiency caused by systemic light chain amyloidosis (AL). The patient had prolonged prothrombin and activated partial thromboplastin time, which got corrected on mixing with normal plasma, and factor X activity was markedly reduced at 5%. Rectal biopsy and immunofixation electrophoresis established the diagnosis of AL and the patient was started on bortezomib-based chemotherapy. Hence, appropriate coagulation work-up should be conducted in patients with renal dysfunction with prolonged coagulation times, as it can sometimes reveal the underlying diagnosis in situations where renal biopsy could not be done due to high risk of bleeding. [ABSTRACT FROM AUTHOR]

We describe a 45-year-old man, heavy smoker, presenting with 6.5 × 5.3 cm painless solitary growth over right temporal region. Chest radiograph showed opacity over left lung abutting mediastinum. Computed tomogram revealed homogenous ill-defined opacity indicative of bronchogenic carcinoma with metastases to right lung, liver and adrenal glands. The carina was involved with tumor along with partial obliteration of the left main bronchus over bronchoscopy; the biopsy confirmed squamous cell carcinoma. The biopsy from scalp lesion and cervical lymph node also established metastatic squamous cell carcinoma. Although cutaneous metastasis with primary lung cancer has been reported, the scalp lesion as a sole presenting feature of underlying quiescent squamous cell lung cancer, which is described here, has not been reported frequently. [ABSTRACT FROM AUTHOR]